Consulta: creatorFacets:"Zarina, Livija"
Registros recuperados: 42
Data/hora: 05/06/2024 06:22:59

Geographical distribution of challenging weed species - Current knowledge in organic arable farming in the Baltic sea region
Provedor de dados: 21
Autores: Hofmeijer, Merel A.J.; Melander, Bo; Krawczyk, Roman; Verwijst, Theo; Zarina, Livija; Salonen, Jukka; Gerowitt, Bärbel.
They create a great source of agro biodiversity, generating habitats and food sources for other organisms; yet weeds have always posed the greatest challenge in Organic Agriculture from the perspective of production.   Because of the specific agricultural management of this farming system, several groups of weed species have naturally adjusted. These can be highly competitive to the crop, acquire high inputs to remove and/or spread rapidly.  In this leaflet we will describe the most challenging weed species in organic spring sown cereals in the geographical area of the Baltic sea, based on existing literature and information provided by extension services.  We will show and discuss their distribution from country to country and propose a classification...
Tipo: Report
Palavras-chave: Education; Extension and communication Weed management.
Ano: 2017
URL: http://orgprints.org/32600/7/Geographical%20distribution%20of%20challenging%20weed%20species%20-%20References%20-%20Hofmeijer.pdf

Can variety mixtures of spring barley benefit weed management?
Provedor de dados: 21
Autores: Sønderskov, Mette; Melander, Bo; Kaczmarek, Sylvia; Zarina, Livija.
Weed suppressing abilities of organic spring barley varieties
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2018
URL: http://orgprints.org/33542/1/EWRS_18_WP3.pdf

Team-up crop diversification and weed  management: PRODIVA. Better utilization of crop diversification for weed management in North European organic arable cropping systems.
Provedor de dados: 21
Autores: Gerowitt, Bärbel; Hofmeijer, Merel A.J.; Melander, Bo; Krawczyk, Roman; Salonen, Jukka; Verwijst, Theo; Zarina, Livija.
The research-network PRODIVA focuses on a better utilization of crop diversification for weed management in North European arable cropping systems. The goal is to maintain diverse arable weed vegetation that is manageable in the long-term and could fulfil other necessary system-functions including support of beneficial organisms. The partners in PRODIVA will synthesize knowledge from terminated and running research projects and set-up selected new experiments on cover crops and variety resp. crop mixtures. Moreover, we will interact with partners from farming practice and extension services in organic agriculture. Regional fields will be surveyed for weeds to safeguard the relevance of the experimental research. Current cropping practices and their...
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds Crop health; Quality; Protection Weed management.
Ano: 2015
URL: http://orgprints.org/29919/1/Poster%20Crop%20diversification%20and%20weeds%20Montpellier%202015.pdf

Crop diversity - a crucial remedy for weed management in organic cropping
Provedor de dados: 21
Autores: Salonen, Jukka; Zarina, Livija; Melander, Bo.
A wide variety of crop species in crop rotations has turned out an essential means to obtain diversification in organic cropping systems. Moreover, the potential of cover crops to assist the main crop in weed suppression has been studied in Denmark, Finland and Latvia. Long-term field experiments in Denmark and Latvia demonstrated that crops with different life cycles and life spans in crop sequence resulted in a relatively low and manageable pressure of annual weeds. The study was part of the PRODIVA project (Core Organic Plus) in which crop diversification for better weed management has been studied and presented in the 18th EWRS Symposium.
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Weed management.
Ano: 2018
URL: http://orgprints.org/33480/1/EWRS2018_OralAbstract_Salonen%20et%20al.pdf

Weed management methods
Provedor de dados: 21
Autores: Zarina, Livija.
Within project PRODIVA activities the best practice on weed management through the diversifying crops and cultural practices were summarized.
Tipo: Other
Palavras-chave: Crop health; Quality; Protection Weed management.
Ano: 2017
URL: http://orgprints.org/33492/2/Nezalu%20ierobezosanas%20metodes%20biologiskaja%20lauksaimnieciba_09.03.2017_L.Zarina.pdf

Crop diversification for weed management in North European organic arable cropping systems. Introduction to the study of international research-network on diversification and weed management: PRODIVA.
Provedor de dados: 21
Autores: Hofmeijer, Merel A.J.; Gerowitt, Bärbel; Krawczyk, Roman; Salonen, Jukka; Verwijst, Theo; Zarina, Livija; Melander, Bo.
The international research network PRODIVA aims to improved utilization of crop diversification for weed management in northern European organic arable cropping systems. The over-all aim is to support organic agriculture for the exploitation of crop diversification methods to improve weed management and still maintain a diverse weed flora. Hypothesized is that crop diversification can improve weed management while ensuring a diverse weed flora by the employment of: (I) pertinent crop sequencing that mitigates noxious weed species (II) improved cover crop establishment with selected competitive cover crop species (III) crop mixtures utilizing the resources better than sole crop species resulting in more weed suppression (IV) variety mixtures exerting a...
Tipo: Conference paper, poster, etc.
Palavras-chave: Biodiversity and ecosystem services; Weed management.
Ano: 2016
URL: http://orgprints.org/30633/1/Poster%20PRODIVA%20Praag%20-%20MAJ%20Hofmeijer.pdf

Mixtures of varieties of spring cereals for weed suppression in organic crop production
Provedor de dados: 21
Autores: Zarina, Livija; Kaczmarek, Sylvia; Melander, Bo.
The suppression of weeds exerted by the crop plays a significant role for weed management in organic crop production. Crop species have different competitive abilities against weeds but also crop varieties vary in their suppression of weeds. Previous studies with varieties of spring cereals have demonstrated marked differences in the suppression of weeds caused by different attributes, such as stem height and leaf area index. However, little is known when different varieties of the same cereal species are mixed in different compositions both in terms of the number of varieties included and the seed rates at which they are established. Some studies have focused on yield and disease aspects but this study aimed to identify and select blends of cultivars of...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection Weed management.
Ano: 2016
URL: http://orgprints.org/30747/1/iwsc-2016-abstract-id-321REV_corrected_SK_LZ_BME.pdf

The most success action to manage weeds – proper crop sequence plus harrowing in the right time.
Provedor de dados: 21
Autores: Zarina, Livija.
The best practices for weed control on the farm KELMENI (lATVIA) are summarized.
Tipo: Other
Palavras-chave: Weed management.
Ano: 2018
URL: http://orgprints.org/33576/1/successtory_weeds.pdf

Effect of crop rotation on soil nutrient balance and weediness in soddy  podzolic organic farming fields
Provedor de dados: 21
Autores: Zarina, Livija; Zarina, Liga.
The nutrient balance in different crop rotations under organic cropping system has been investigated in Latvia at the Institute of Agricultural Resources and Economics since 2006. Latvia is located in a humid and moderate climatic region where the rainfall exceeds evaporation (soil moisture coefficient &gt; 1) and the soil moisture regime is characteristic with percolation. The average annual precipitation is 670-850 mm. The average temperature varies from -6.7 ◦ C in January to 16.5 ◦ C in July. The growing season is 175 - 185 days. The most widespread are podzolic soils and mainly they are present in agricultural fields in all regions of Latvia. In a wider sense the goal of the soil management in organic farming is a creation of the biologically active...
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2017
URL: http://orgprints.org/33076/1/EGU2017-13096-1.pdf

Cover crop effect in weed management: project PRODIVA monitoring results
Provedor de dados: 21
Autores: Zarina, Livija; Zarina, Liga.
Weed survey was done in twenty fields of ten organic farms in Latvia in 2015 and 2016 to identify and group weed species due their susceptibility for crop diversification and to fix cover crops effect on weediness. Among the most common species were:TAROF, STEME,TRIIN, CIRAR,VERAR,ELYRE, POAAN, EQUAR.Weed infestation was affected also by cover crop species.
Tipo: Other
Palavras-chave: Weed management.
Ano: 2017
URL: http://orgprints.org/31438/1/posteris_LLU2017_Virsauga_efektiv_Prodiva.pdf

Wykorzystanie potencjału mieszanin odmian owsa jarego i jęczmienia jarego w redukcji zachwaszczenia
Provedor de dados: 21
Autores: Kaczmarek, Sylvia; Zarina, Livija; Melander, Bo; Krawczyk, Roman.
Prezentowane wyniki badań są częścią międzynarodowego projektu PRODIVA - Crop diversification and weeds (http://coreorganicplus.org/research-projects/prodiva) finansowanego przez Narodowe Centrum Badań i Rozwoju i realizowanego w ramach konkursu ,,Core Organic Plus”. Projekt skierowany jest na wspieranie bioróżnorodności jako ważnego elementu kierowania zachwaszczeniem w rolnictwie ekologicznym.    W pracy zaprezentowano wyniki badań polowych prowadzonych w Polsce i Łotwie, które miały na celu uzyskanie informacji na temat cech odmian i mieszanek odmian zapewniających optymalną redukcję zachwaszczenia.  W badaniach zastosowano łącznie  dziesięć odmian jęczmienia jarego oraz sześć odmian owsa jarego.   W badaniach wykonano pomiary masy chwastów, wysokości...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection Weed management.
Ano: 2016
URL: http://orgprints.org/30272/1/abstract.pdf

Cover crops in cereals – better companions than weeds?
Provedor de dados: 21
Autores: Salonen, Jukka; Zarina, Livija; Melander, Bo.
Cover crops have gained popularity in cereal cropping now that they are one of the subsidized options in agri-environmental schemes of the EU. Several studies on cover/catch crops affecting nutrient leaching have been published but less information is available concerning their applicability for weed management. In our opinion, combinations of crop and cover crop types as well as crop sequencing conform IPM principles and optimize weed management. The PRODIVA project (ERA-Net Core Organic Plus Action, www.coreorganicplus.org) aims at identifying weed community associations with most common crop types in organic crop production systems. We will clarify the characteristics and relative competitiveness of cover crops providing strong weed suppression without...
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2016
URL: http://orgprints.org/30624/1/PRODIVA%20Poster%20Cover%20Crops_IWSC2016Prague_final030516.pdf

Crop diversification and weeds in organic cereal production
Provedor de dados: 21
Autores: Salonen, Jukka; Melander, Bo; Gerowitt, Bärbel; Lundkvist, Anneli; Verwijst, Theo; Krawczyk, Roman; Kaczmarek, Sylvia; Zarina, Livija.
PRODIVA Project introduction
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Weed management.
Ano: 2016
URL: http://orgprints.org/29680/1/PRODIVA%20Poster%20Crop%20diversification%20and%20weeds_SMTP2016Helsinki.pdf

The arable vegetation of Baltic organic cereal fields as shaped by crop management
Provedor de dados: 21
Autores: Hofmeijer, Merel A.J.; Melander, Bo; Salonen, Jukka; Verwijst, Theo; Zarina, Livija; Gerowitt, Bärbel.
Weeds remain to be the main challenge within this agricultural system, especially perennials in the north European realm. Because of increased interest in agrobiodiversity functioning, weeds should be kept within manageable limits, while on the other side encourage a specie rich weed flora. One of the PRODIVA project objectives is to investigate to which extent these two aspects can be addressed through the use of diversified crop management. In order to research this objective, weed and management data were obtained from organic farms in the baltic region over the course of two years (2015-2016) in spring sown cereal crops. The impact of the local environment and management factors on the occurring weed communities was studied in multivariate analysis...
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general; Crop combinations and interactions; Weed management.
Ano: 2018
URL: http://orgprints.org/33428/1/Presentation_ewrs_MHofmeijer.pdf

Spring cereal variety mixtures and their relevance for weed suppression in agroecological conditions of Latvia
Provedor de dados: 21
Autores: Piliksere, Dace; Zarina, Livija.
Good weed suppression ability is required characteristic for crops grown in organic conditions. Some authors report that crop variety mixtures can be more effective in weed suppression than the varieties in pure sowings (DidonandRodriguez,2006). Some other studies show that variety mixtures do not suppress weeds better than their pure components(Kautetal.,2008). The aim of the present study was to evaluate spring cereal(barleyandoat)variety mixtures for their weed suppression ability in agroecological conditions of Latvia. This report includes some results from the ERA-NET CoreOrganicPLUS project “Crop Diversification and Weeds(PRODIVA)”.
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2017
URL: http://orgprints.org/33491/1/Piliksere_Zarina_Poster_Nyon_2017.pdf

Crop diversification and weeds in organic cereal production
Provedor de dados: 21
Autores: Salonen, Jukka; Melander, Bo; Gerowitt, Bärbel; Lundkvist, Anneli; Verwijst, Theo; Krawczyk, Roman; Kaczmarek, Sylvia; Zarina, Livija.
PRODIVA Project introduction and promotion
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Weed management.
Ano: 2016
URL: http://orgprints.org/30107/1/PRODIVA%20Poster%20Crop%20diversification%20and%20weeds_SMTP2016Helsinki.pdf

Crop diversification and weeds  Acronym: PRODIVA
Provedor de dados: 21
Autores: Melander, Bo; Gerowitt, Bärbel; Salonen, Jukka; Verwijst, Theo; Lundkvist, Anneli; Zarina, Livija; Hofmeijer, Merel A.J.; Sylwia, Kaczmarek; Roman, Krawczyk.
Diversification of crop sequences (WP 1): Perennial weed species can be managed when cover crops / green manure crops are included in the crop sequence but interventions must be species dependent, e.g. Elytrigia repens can be promoted by green manures because they prevent post-harvest cultivations. Cirsium arvense and Sonchus arvensis are two perennials that can be controlled by full-season grass-clover subjected to regular mowing for green manuring purposes and this measure has immediate application.  Cover crops for diversification (WP 1):   Fast growing cover crops producing copious biomasses are generally useful for the suppression of weeds but need to be abandoned when severe infestations of Elytrigia repens require post-harvest cultivations for...
Tipo: Report
Palavras-chave: Weed management.
Ano: 2018
URL: http://orgprints.org/35024/1/COPlus_2018%20PRODIVA_final_report_Organic%20Eprints.pdf

Crop diversification for weed management in organic arable cropping systems
Provedor de dados: 21
Autores: Zarina, Livija; Gerowitt, Barbel; Melander, Bo; Salonen, Jukka; Krawczuk, Roman; Verwijst, Theo.
Within the ERA-net CORE Organic Plus transnational programmes supported project PRODIVA producing of the information required for a better utilization of crop diversification for weed management in North European organic arable cropping systems was started. To fulfill the goal of this project- not to eradicate weed problems, which is unlikely to happen in any arable farming system, but to maintain a diversified and manageable weed flora that can support beneficial organisms- there were data from ongoing long-termed cropping system experiments from Latvia analyzed.    It is hypothesised that: a) perennial weeds can be suppressed in the post-harvest period by improved cover crop establishment and pertinent selection of cover crop species; b) on-farm...
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2016
URL: http://orgprints.org/29793/1/Zarina%20et%20all%20274-1405-1-PB.pdf

Weed Competitiveness of variety mixtures in an organic cropping system
Provedor de dados: 21
Autores: Sønderskov, Mette; Kaczmarek, Sylvia; Zarina, Livija; Melander, Bo.
Preliminary draft of paper for peer-review. It summarises all the experiments made in WP3 in PRODIVA that dealt with the weed suppressing abilities of spring barley mixtures.
Tipo: Other
Palavras-chave: Weed management.
Ano: 2018
URL: http://orgprints.org/33549/1/Variety%20mixtures%20DRAFT.pdf

Mixtures of varieties of spring cereals for weed suppression in organic crop production
Provedor de dados: 21
Autores: Zarina, Livija; Kaczmarek, Sylvia; Melander, Bo; Sonderskov, Mette.
The suppression of weeds exerted by the crop plays a significant role for weed management in organic crop production. Crop species have different competitive abilities against weeds but also crop varieties vary in their suppression of weeds. Previous studies with varieties of spring cereals have demonstrated marked differences in the suppression of weeds caused by different attributes, such as stem height and leaf area index. However, little is known when different varieties of the same cereal species are mixed in different compositions both in terms of the number of varieties included and the seed rates at which they are established. Some studies have focused on yield and disease aspects but this study aimed to identify and select blends of cultivars of...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Crop husbandry; Weed management.
Ano: 2016
URL: http://orgprints.org/30742/1/IWSC2016_poster_ID_321.pdf

The impact of crop diversification management on weed communities in summer cereals on organic farms in Northern Europe. An introduction to the study.
Provedor de dados: 21
Autores: Hofmeijer, Merel A.J.; Gerowitt, Bärbel; Salonen, Jukka; Verwijst, Theo; Zarina, Livija; Melander, Bo.
This study is a component of the CORE Organic Plus PRODIVA project, a collaboration between international weed research institutions, which aims to improved utilization of crop diversification for weed management in northern European organic arable cropping systems. The overall goal is to maintain a diversified and manageable weed flora that can support beneficial organisms. The objective of this specific research conducted by the Group Crop Health of the University Rostock is: to identify practical weed challenges, to investigate the role of crop diversification management for weed management in the field and to cluster weed species into practical groups. In order to reach this objective a diversity of methods are proposed.  Data collection takes place on...
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds Crop health; Quality; Protection Weed management.
Ano: 2016
URL: http://orgprints.org/29917/1/Hofmeijer%20and%20Gerowitt%20et%20al%202016.pdf

Problematic weed species in organic arable agriculture around the Baltic Sea - An expert database
Provedor de dados: 21
Autores: Hofmeijer, Merel A.J.; Melander, Bo; Krawczyk, Roman; Salonen, Jukka; Verwijst, Theo; Zarina, Livija; Gerowitt, Bärbel.
Weeds are a perpetual challenge in Organic agriculture. However, they serve multiple ecosystem services and a low competitive weed cover can be tolerated. Adding to this, is the fact that only a few species prove problematic for both the crop and the farmer. The international PRODIVA project researches the effect of crop diversity strategies on the diversity of weed communities, hypothesizing that by increasing the weed diversity, the development of problematic weeds will mitigated. A preparatory study was conducted to list the most problematic weed species in spring sown cereals in the countries involved with PRODIVA. For this a literature review was conducted in all participating countries, collecting local sources including grey literature. This was...
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general Cereals; Pulses and oilseeds Weed management.
Ano: 2017
URL: http://orgprints.org/31559/1/170308%20Poster%20Freising%20Hofmeijer.pdf

Crop diversification for weed management in organic arable cropping systems
Provedor de dados: 21
Autores: Zarina, Livija; Gerowitt, Bärbel; Melander, Bo; Salonen, Jukka; Krawczyk, Roman; Verwijst, Theo.
Within the ERA-net CORE Organic Plus transnational programmes supported project PRODIVA producing of the information required for a better utilization of crop diversification for weed management in North European organic arable cropping systems was started. To fulfill the goal of this project- not to eradicate weed problems, which is unlikely to happen in any arable farming system, but to maintain a diversified and manageable weed flora that can support beneficial organisms- there were data from ongoing long-termed cropping system experiments from Latvia analyzed.   It is hypothesised that: a) perennial weeds can be suppressed in the post-harvest period by improved cover crop establishment and pertinent selection of cover crop species; b) on-farm practices...
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2015
URL: http://orgprints.org/30746/1/746

2016. gada projekta rezultāti.
Provedor de dados: 21
Autores: Zarina, Livija.
...
Tipo: Report
Palavras-chave: Weed management.
Ano: 2017
URL: http://orgprints.org/33078/1/Prodiva_rezultati%202016.pdf

Efficiency of different type of vermicompost in potato/DAŽĀDU VERMIKOMPOSTU VEIDU EFEKTIVITĀTE KARTUPEĻU STĀDĪJUMOS
Provedor de dados: 21
Autores: Zarina, Livija.
There were two types of vermicompost (VK1-green manure sward, VK2- sheep manure)compared in Latvia at State Priekuli Plant Breeding Institute compared in potato starting 2013.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality Composting and manuring Crop husbandry Soil Crop health; Quality; Protection.
Ano: 2015
URL: http://orgprints.org/23685/1/Latvia-Lidzsvarota-lauksaimnieciba2015.pdf

Problematic weed species in spring sown cereals around the Baltic Sea - an expert database.
Provedor de dados: 21
Autores: Hofmeijer, Merel A.J.; Melander, Bo; Krawczyk, Roman; Salonen, Jukka; Verwijst, Theo; Zarina, Livija; Gerowitt, Bärbel.
Implications - Specific annual and perennial weeds are a perpetual challenge in the process of tuning up sustainable Organic production. To utilize the perspective of agro-biodiversity would both improve crop yields as well as conserve the ecosystem services of this agriculture system. The successful use of crop diversity strategies provides an additional tool in the toolbox of the farmers, giving them a) an overview of problematic weed species and b) the opportunity to plan their crop diversity based weed management over the course of years in the future.
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds Education; Extension and communication Weed management.
Ano: 2017
URL: http://orgprints.org/31415/7/Hofmeijer%20NJF%20Organic%20Conference%202017_fv.pdf

Atskaite: 2017.gada projekta rezultāti
Provedor de dados: 21
Autores: Zarina, Livija.
2017.GADA PROJEKTA REZULTĀTI
Tipo: Report
Palavras-chave: Weed management.
Ano: 2018
URL: http://orgprints.org/33079/1/Prodiva_Atsk_2017_0.pdf

UNDER-SOWING EFFICIENCY FOR WEED MANAGEMENT IN SPRING CEREALS
Provedor de dados: 21
Autores: Zarina, Livija; Piliksere, Dace; Zarina, Liga.
The data on weediness from the ongoing crop rotation experiment at the State Priekuli Plant Breeding institute were analysed on the basis of hypothesis that under-sowing in spring cereals can improve weed management. Grass/clover mixture (Trifolium pratense L. and Phleum pratense L.) as under- sowing in spring barley (Hordeum vulgare L.) was grown for one and two seasons in six field crop rotation. Numbers of weed plants in spring (BBCH 20 – 29) were recorded using 0.1 m2 big frame in 10 places; plant biomass of under-sown crops and weeds were sampled within 1.0 x 1.0 m squares after the first cut in the following year after harvesting of main crop (barley). The total of 28 weed species were registered. The most common species were Chenopodium album L.;...
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2016
URL: http://orgprints.org/33074/1/Livija%20Zarina_conference_paper_2016.pdf

Potential of cover crops for weed management in organic cropping
Provedor de dados: 21
Autores: Salonen, Jukka; Zarina, Livija.
An Abstract offer to the NJF Seminar in Mikkeli
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Weed management.
Ano: 2017
URL: http://orgprints.org/31253/3/Salonen_Potential%20of%20cover%20crops%20for%20weed%20management_reviewed.docx

Farmers deserve credit for contributing to the weed surveys
Provedor de dados: 21
Autores: Salonen, Jukka; Hofmeijer, Merel A.J.; Zarina, Livija; Krawczyk, Roman; Verwijst, Theo; Melander, Bo.
Weed surveys were carried out in the PRODIVA project during 2015-2016 with a smooth collaboration with farmers. More than 200 fields were surveyed in six countries around the Baltic Sea. In addition to the weed observations in spring cereal fields we collected information about the farming practices in organic cropping.
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2018
URL: http://orgprints.org/32534/1/PRODIVA_Poster_SMTP2018Helsinki_final.pdf

Undersown effect in weed management in organic cropping systems
Provedor de dados: 21
Autores: Zarina, Livija; Salonen, Jukka; Hofmeijer, Merel A.J.; Gerowitt, Bärbel; Lundkvist, Anneli; Verwijst, Theo; Sonderskov, Mette; Melander, Bo; Kaczmarek, Sylvia; Krawczyk, Roman.
The main reason for controlling weed abundance in agricultural crops is the risk for qualitative and quantitative reductions in crop yields. Although there are no simple standard solutions available for weed control in organic agriculture, however, some cultural practices—in particular, undersow in spring cereals—can be critical components of weed management. To study this thesis, specific research has been carried out in the CORE Organic Plus PRODIVA project in six northern European countries—Denmark, Finland, Germany, Latvia, Poland &amp; Sweden. Density of weed species were assessed in 109 organic fields situated in different agro–ecological conditions of region. The highest number of weed species fixed in surveyed fields was 93 (in Denmark). The most...
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2017
URL: http://orgprints.org/33077/7/agrosym2017_Abstract_Zarina%26.pdf

Crop diversification for weed management in organic arable cropping systems
Provedor de dados: 21
Autores: Zarina, Livija; Gerowitt, Bärbel; Melander, Bo; Salonen, Jukka; Krawczyk, Roman; Verwijst, Theo.
Within the ERA-net CORE Organic Plus transnational programmes supported project PRODIVA producing of the information required for a better utilization of crop diversification for weed management in North European organic arable cropping systems was started. To fulfil the goal of this project- not to eradicate weed problems, which is unlikely to happen in any arable farming system, but to maintain a diversified and manageable weed flora that can support beneficial organisms- there were data from ongoing long-termed cropping system experiments from Latvia analyzed.  It is hypothesised that: a) perennial weeds can be suppressed in the post-harvest period by improved cover crop  establishment and pertinent selection of cover crop species; b) on-farm practices...
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2015
URL: http://orgprints.org/30741/1/746

Viljelijöillä tärkeä rooli rikkakasvikartoitusten partnerina
Provedor de dados: 21
Autores: Salonen, Jukka; Hofmeijer, Merel A.J.; Zarina, Livija; Krawczyk, Roman; Verwijst, Theo; Melander, Bo.
PRODIVA-hankkeen (”Crop diversification and weeds”, 2015-2018,Core Organic Plus –ohjelma) tutkimusryhmät ovat keränneet yhdessä viljelijöiden kanssa tietoa, miten eri maissa noudatettavat luonnonmukaisen tuotannon viljelykäytännöt vaikuttavat rikkakasvilajistoon ja rikkakasveista aiheutuviin haittoihin. Posterissa kuvataan maatiloilta saatavan tiedon merkitystä kasvinsuojelututkimukselle.
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2018
URL: http://orgprints.org/32548/1/PRODIVA_Poster_KSSpvt2018_final.pdf

Genotype and environment interaction on field pea cultivars in organic cropping system
Provedor de dados: 21
Autores: Zarina, Livija; Alekse, Ilona.
Like other grain legumes, also field pea globally is important sources of plant protein and their growing have also positive effect on soil fertility. But, there are some constraints in their production, such pests and diseases and unstable yield. A high biodiversity and the selection of appropriate cultivars are important factors for the stability of agricultural systems especially in organic farming. Corresponding genotype choice for pea growing in mixtures with cereals can be one of the possibilities which enhances stable yield through field environment changes based on species diversity.
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions Breeding; Genetics and propagation.
Ano: 2017
URL: http://orgprints.org/31643/1/mikkeli_Abstract_NJF495_2017_Zarina_corrected_3jun.docx

PRODIVA report 2016_Information of public in the Ministry of Agriculture, LATVIA
Provedor de dados: 21
Autores: Zarina, Livija; Piliksere, Dace; Zarina, Liga.
Saskaņā ar projektā PRODIVA plānotajām aktivitātēm 2016. gadā turpināti pētījumi par nezāļu ierobežošanas iespējām izvēloties piemērotas labību sugas, šķirnes un to maisījumus.  Divdesmit zemnieku saimniecību laukos turpināts nezāļu monitorings noskaidrojot izplatītākās nezāļu sugas labību sējumos ar pasēju un nezāļu ierobežošanai efektīvāko lauku kopšanas paņēmienu bioloģiskajā saimniekošanas sistēmā.
Tipo: Other
Palavras-chave: Weed management.
Ano: 2016
URL: http://orgprints.org/30917/1/Prodiva_ZM_2016%208dec.pdf

Efektīvākās nezāļu ierobežošanas metodes – gudri plānota augu maiņa plus ecēšana pareizajā laikā
Provedor de dados: 21
Autores: Zarina, Livija.
Since Kelmeni farm is a good example in field crop management for other organic farms, it was invited to participate in the Core Organic Plus project, named PRODIVA, in which weeds were surveyed in more than 200 fields across regions in Finland, Sweden, Germany, Denmark, Poland and Latvia; all bordering the Baltic Sea (http://projects.au.dk/coreorganicplus/research-projects/prodiva/).  In context of weed control farmer using all possible crop diversity experiences– undersowing, crop mixtures, diverse rotation, winter cover.
Tipo: Other
Palavras-chave: Farming Systems; Weed management.
Ano: 2018
URL: http://orgprints.org/33580/1/successtory_nezalu%20ierobezosana_veiksmes%20piemers.pdf

VIRSAUGĀ SĒTU VASARĀJU LABĪBU EFEKTS NEZĀĻU IEROBEŽOŠANĀ: PROJEKTA PRODIVA MONITORINGA REZULTĀTI BIOLOĢISKAJĀS SAIMNIECĪBĀS
Provedor de dados: 21
Autores: Zarina, Livija; Zarina, Liga.
Viens no projektā PRODIVA (Augu daudzveidība un nezāles) plānotajiem uzdevumiem ir, bāzējoties uz monitoringos iegūtiem, rezultātiem apkopot informāciju par virsaugā sētu vasarāju labību efektu nezāļu ierobežošanā (http://coreorganicplus.org/research-projects/prodiva/). Izvirzītā hipotēze- vasarāju labību lauku ar pasēju nezāļainības līmeni un nezāļu sugu sastāvu ietekmē virsauga suga.
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2017
URL: http://orgprints.org/33075/1/Zarina_PRODIVA_2017_2llu_isais_Virsauga_efektivitate_stenda%20ref_Zarinas.pdf

Weed management methods in organic farming
Provedor de dados: 21
Autores: Zarina, Livija.
Programm and presentation from SPRING SEMINAR in Priekuli, 09.03.2017.
Tipo: Other
Palavras-chave: Farming Systems; Weed management.
Ano: 2017
URL: http://orgprints.org/33080/1/Nez%EF%BF%BD%2581%C4%BCu%20ierobe%C5%BEo%26scaron%3Banas%20metodes%20biolo%C4%A3iskaj%EF%BF%BD%2581%20lauksaimniec%C4%ABb%EF%BF%BD%2581_09.03.2017_L.Zari%EF%BF%BD%2586a.pdf

Problematic weed species in organic arable agriculture around the Baltic Sea - An expert database
Provedor de dados: 21
Autores: Hofmeijer, Merel A.J.; Melander, Bo; Krawczyk, Roman; Salonen, Jukka; Verwijst, Theo; Zarina, Livija; Gerowitt, Bärbel.
Weeds are a perpetual challenge in Organic agriculture. However, they serve multiple ecosystem services and a low competitive weed cover can be tolerated. Adding to this, is the fact that only a few species prove problematic for both the crop and the farmer. The international PRODIVA project researches the effect of crop diversity strategies on the diversity of weed communities, hypothesizing that by increasing the weed diversity, the development of problematic weeds will mitigated. A preparatory study was conducted to list the most problematic weed species in spring sown cereals in the countries involved with PRODIVA. For this a literature review was conducted in all participating countries, collecting local sources including grey literature. This was...
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general Cereals; Pulses and oilseeds Weed management.
Ano: 2017
URL: http://orgprints.org/31816/1/170626%20Poster%20Freising%20revised.pdf

Weed biomass in cereals depending growing in pure stand or mixtures
Provedor de dados: 21
Autores: Zarina, Livija; Vaivode, Aija; Zarina, Liga.
There started field experiments at State Priekuli Plant Breeding Institute, in cooperation with other Nordic countries research institutes from Denmark, Germany, Poland, Sweden and Finland, to fulfil tasks of Core Organic Plus project 'Weeds and Biodiversity'(PRODIVA). One of the research project hypothesis was based on the assumption that crop and variety mixtures have greater suppressive abilities against weeds than the sole crop and variety. The first results confirm this. Between the three studied oat varieties best weed suppresion show variety 'Kalli'; among the four tested spring barley varieties-'Maali’.
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2016
URL: http://orgprints.org/30743/1/Tezes_stenda%20ref_2016.doc

Spring cereal variety mixtures and their relevance for weed suppression in agroecological conditions of Latvia
Provedor de dados: 21
Autores: Piliksere, Dace; Zarina, Livija.
The aim of the present study was to evaluate spring cereal(barley and oat)variety mixtures for their weed suppression ability in agroecological conditions of Latvia.  It was concluded that in two-years tudy,investigated spring cereal variety mixtures did not show better ability to suppress weeds if compared to their pure components.Additional studies would be necessary to evaluate root development and allelopathic activity of crop and weed plants.
Tipo: Other
Palavras-chave: Weed management.
Ano: 2017
URL: http://orgprints.org/31437/1/Piliksere_Zarina_Poster_Nyon_2017.pdf

Problemātisko nezāļu sugu ģeogrāfiskā izplatība - Pašreizējās zināšanas bioloģiskajā zemkopībā Baltijas jūras reģionā
Provedor de dados: 21
Autores: Hofmeijer, Merel A.J.; Zarina, Livija.
Nodrošinot vidi un barību citiem organismiem, nezāles lielisks agrobioloģiskās daudzveidības avots; tomēr, raugoties no ražošanas perspektīvas, tās vienmēr ir radījušas vislielākās problēmas bioloģiskajā lauksaimniecībā.   Vairākas nezāļu sugu grupas ir dabiski pielāgojušās bioloģiskajai saimniekošanas sistēmai. Tās var spēcīgi konkurēt ar laukaugu, prasīt lielus resursus to ierobežošanai, un/vai strauji izplatīties.  Šajā brošūrā, pamatojoties uz esošo literatūru un informāciju, kas apkopota izmantojot  publicēto no konsultāciju dienestu un pētniecisko projektu pārskatiem un publikācijām, aprakstītas problemātiskākās nezāļu sugas bioloģisko vasarāju labību sējumos Baltijas jūras reģionā.  Parādīta un apspriesta šo nezāļu izplatība dažādās  valstīs un...
Tipo: Report
Palavras-chave: Education; Extension and communication Weed management Knowledge management.
Ano: 2017
URL: http://orgprints.org/32597/1/Problem%C4%81tisko%20nez%C4%81%C4%BCu%20sugu%20%C4%A3eogr%C4%81fisk%C4%81%20izplat%C4%ABba_LV.pdf