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Influência da decomposição de diferentes resíduos vegetais submetidos a lâminas de irrigação no comportamento da vegetação espontânea - DOI: 10.4025/actasciagron.v32i2.3732 Agronomy
Souza, Adilson Pacheco de; UNESP - Faculdade de Ciências Agronômicas; Lima, Márcio Emanoel de; Programa de Pós-Graduação em Fitotecnia, UFRRJ, Seropédica; Carvalho, Daniel Fonseca de; UFRRJ, Seropédica; Guerra, José Guilherme Marinho; Embrapa Agrobiologia, Seropédica; Andrade, Irineu Pedro de Sousa; UFRRJ, Seropédica; Rocha, Hermes Soares da; UFRRJ, Seropédica.
Este trabalho objetivou avaliar o comportamento da vegetação espontânea com relação às taxas de decomposição de diferentes coberturas do solo submetidas à variação de lâminas de irrigação. Foram utilizados resíduos vegetais de Gliricídia (Gliricidia sepium), feijão-guandu (Cajanus cajan), capim Cameroon (Pennisetum purpureum) e Bambu (Bambusa vulgaris ‘vitata’). As lâminas irrigadas foram caracterizadas como T5, T4, T3, T2 e T1, correspondendo a aproximadamente 117, 100, 72, 59 e 38% da ETo. A decomposição dos resíduos vegetais foi analisada por meio de covered litter, em 2, 4, 7, 15, 30, 60, 90, 120 e 150 dias após instalação (DAI). Foram realizadas amostragens da vegetação espontânea aos 26, 64, 92, 124 e 152 DAI, em uma área de 0,0625 m²
Palavras-chave: 5.01.03.00-8 Palhada; Manejo da irrigação; Manejo de plantas daninhas Fitotecnia Straw; Irrigation management; Weed management.
Ano: 2010 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3732
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Hormesis with glyphosate depends on coffee growth stage Anais da ABC (AABC)
CARVALHO,LEONARDO B. DE; ALVES,PEDRO L.C.A.; DUKE,STEPHEN O..
Weed management systems in almost all Brazilian coffee plantations allow herbicide spray to drift on crop plants. In order to evaluate if there is any effect of the most commonly used herbicide in coffee production, glyphosate, on coffee plants, a range of glyphosate doses were applied directly on coffee plants at two distinct plant growth stages. Although growth of both young and old plants was reduced at higher glyphosate doses, low doses caused no effects on growth characteristics of young plants and stimulated growth of older plants. Therefore, hormesis with glyphosate is dependent on coffee plant growth stage at the time of herbicide application.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffea arabica L.; Weed management; Herbicide; Spray drift; Stimulatory effect.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200813
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Germination test as a fast method to detect glyphosate-resistant sourgrass Bragantia
Dias,Marcos Altomani Neves; Obara,Flavio Eduardo Botelhos; Arruda,Natalia; Cursi,Patricia Ribeiro; Gonçalves,Navara Roberto; Christoffoleti,Pedro Jacob.
The occurrence of weed species with different levels of resistance to glyphosate has increasingly spread in agricultural areas. In Brazil, sourgrass is among the main species presenting issues in this regard. Thus, fast and reliable methods to detect glyphosate resistance are of special interest for this specie, either for research or rational management purposes. This study was carried out to verify the feasibility of using the germination test to detect glyphosate resistance in sourgrass. The experiment was conducted with two sourgrass biotypes, with different levels of susceptibility to glyphosate. The seeds were previously imbibed in solutions composed of 0, 0.1875%, 0.25%, 0.75%, 1.5%, 3% and 6% of glyphosate during two periods, five and ten minutes,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digitaria insularis (L.); Herbicide resistance; Weed management; Seed analysis.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000300307
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Residual herbicides in Roundup Ready soybean: A case study in multiple years and locations with Ipomoea triloba Ciência e Agrotecnologia
Ovejero,Ramiro Fernando Lopez; Picoli Junior,Gilmar José; Takano,Hudson Kagueyama; Palhano,Matheus; Westra,Philip.
ABSTRACT The evolution of glyphosate-resistant and -tolerant weeds has caused changes in weed management around the world. Residual herbicides are crucial tools for weed management, but the rate of adoption by soybean growers remains very low in Brazil. In this research, we used glyphosate tolerant Ipomoea triloba as a model weed species to evaluate the advantages of using residual herbicides on soybeans in multiple years and locations of transition and Cerrado regions of Brazil, rather than relying only on post-emergence control. Most residual herbicides provided enough residual activity to allow a longer application window in post-emergence. Treatments with residual herbicides increased overall weed control, preventing weed interference and increasing...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pre-emergence; Weed management; Glyphosate resistance; Crop yield; Weed interference..
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100206
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Water retention and s index of an oxisol subjected to weed control methods in a coffee crop Ciência e Agrotecnologia
Siqueira,Raphael Henrique da Silva; Ferreira,Mozart Martins; Alcântara,Elifas Nunes de; Silva,Bruno Montoani; Silva,Raphael Comanducci.
Weed control in different crops affects the chemical, physical, and biological properties of the soil and consequently its structural quality. The objective of this study was to evaluate, using water retention characteristics and the S index, the physical quality of an Oxisol (Red-Yellow Latosol), subjected to weed control during the cultivation of coffee. The following weed control methods were evaluated: harrowing, brushcutting, residue crushing, manual weeding, post-emergence herbicide application, pre-emergence herbicide application, and maintenance of soil cover with peanut forage, Brachiaria grass, and spontaneous vegetation (no weed treatment). The following properties were determined for physical characterization of the soil: bulk density, total...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Weed management; Physical quality of the soil; Soil water retention.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000500006
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Drought Tolerance and Perennial Weed Management Organic Eprints
Nkurunziza, Libère; Andreasen, Christian; Liu, Fulai; Streibig, Jens Carl.
The aim of this study was to investigate the effect of controlled soil water deficits on sprouting and shoot growth of Canada thistle, coltsfoots and quackgrass. A gradient of soil water contents was created by establishing different densities of barley. The plants were harvested 14 days after watering was stopped. On Canada thistle and coltsfoots, relative water content (RWC) in leaves was measured prior to harvest and biomass of all weed shoots were recorded at harvest. In terms of shoot biomass and leaf RWC quackgrass was drought tolerant while coltsfoot was drought sensitive and Canada thistle was between the two. The barley cover crop could have had a competitive effect upon the growth of the weeds; the effect, however, was not detrimental compared to...
Tipo: Journal paper Palavras-chave: Weed management.
Ano: 2011 URL: http://orgprints.org/18363/1/Nkurunziza_Drought_Perennial_3.pdf
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Ikke-kemisk ukrudtsbekæmpelse – mekanisk og termisk Organic Eprints
Melander, Bo; Rasmussen, Ilse A.; Holst, Niels.
Kapitlet gennemgår den vigtigste viden omkring brugen af íkke-kemisk ukrudtsbekæmpelse i landbrugs- og havebrugsafgrøder. Der indgår både klassisk viden og helt nye forskningsresultater. Kapitlet anvendes af studerende på landbrugsskoler, men kan også anvendes af andre interesserede.
Tipo: Book chapter Palavras-chave: Weed management.
Ano: 2011 URL: http://orgprints.org/20610/4/20610.pdf
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Principper for ukrudtsbekæmpelse, strategier og tiltag Organic Eprints
Melander, Bo.
Arbejdsnotat til brug som vejledning til landmænd om ukrudtsbekæmpelse.
Tipo: Working paper Palavras-chave: Weed management.
Ano: 2012 URL: http://orgprints.org/22282/7/22282.pdf
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Nye maskiner - nye muligheder Organic Eprints
Bertelsen, Inger; Olsen, Lars Egelund.
Mange landmænd har i de seneste år investeret i radrensere med kamerastyring, og nu dyrkes en del afgrøder på 25 cm rækkeafstand. Den nye dyrkningspraksis er taget op i to projekter, OptiMek og RowCrop, som skal klarlægge mulighederne med de nye radrensere.
Tipo: Newspaper or magazine article Palavras-chave: Weed management.
Ano: 2015 URL: http://orgprints.org/29162/7/29162.pdf
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New ways of stubble cultivation Organic Eprints
Alföldi, Thomas.
Creeping thistles, couch grass and broad-leaved docks cause more and more trouble in organic agriculture. In order to keep them at bay, a stubble cultivation adapted to the soil type and crop rotation needs to be developed. Just after the harvest is the best time to weaken the root weeds. Nowadays, many different machines are available, such as disc harrows, flat cultivators and skimmers. Each of the three types provides a soil-preserving alternative to the plough. However, which machine is best for which soil and crop rotation? The video helps to answer this question. It shows the functionalities as well as the strengths and weaknesses of different machines that can be used for stubble cultivation. Organic farmers talk about their soil type and their...
Tipo: Practice tool Palavras-chave: Soil; Weed management.
Ano: 2010 URL: http://orgprints.org/31183/1/video.php_y%3Dhttps_%252F%252Fwww.youtube.com%252Fwatch_v%3DNc_jZHq2M8w%26index%3D15%26list%3DPL1dOum9RiVPgnHqie0mqIQakpPTWwYfso
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Sandwich-System - die Sache wird konkret Organic Eprints
Schmid, Andi; Weibel, Franco; Allemann, Pius; Santini, Dino.
Aus Gründen einer genügenden Wasser- und Nährstoffversorgung bedarf der Baumstreifen in Niederstammanlagen einer Beikrautregulierung. Erfolgt diese ohne Herbizide wird der Baumstreifen entweder mit organischen Materialien (Baumrinde, Holzhäcksel, Stroh) oder wasserdurchlässigem Kunststoffgewebe abgedeckt oder durch Hacken mit Spezialgeräten offen gehalten. Beide Methoden bergen jedoch gewichtige Nachteile in sich. Bei der Abdeckung sind dies die hohen Materialkosten, der z. T. hohe Kalieintrag (Erhöhung der Stippegefahr) und der erhöhte Mäusedruck. Das herkömmliche Hacken ist zeitintensiv, die Anschaffungs- und Wartungskosten geeigneter Hackgeräte sind hoch. Beim Sandwich-System bleibt ein schmales Band im Zentrum des Baumstreifens unbearbeitet. Links...
Tipo: Book chapter Palavras-chave: Fruit and berries; Weed management.
Ano: 2004 URL: http://orgprints.org/2778/1/schmid%2D2004%2Dsandwich%2Dsystem.pdf
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Aspekte zur Unkrautregulierung im ökologischen Landbau [Aspects for weed management in organic farming] Organic Eprints
Schleuß, Uwe.
Ein zentrales Problem im ökologischen Pflanzenbau ist es, die Schwierigkeiten bei der Regulierung der Unkrautflora in den Griff zu bekommen. Neben den direkten Verfahren der Unkrautregulierung (biologische, thermische oder mechanische Maßnahmen), kommen im ökologischen Landbau vor allem indirekten Maßnahmen eine besondere Bedeutung zu. Neben der Fruchtfolge sind weitere indirekte Unkrautregulierungsmaßnahmen, wie Lichtentzug, Saatgutreinigung, Saatgutqualität, Bodenbearbeitung, Standraum der Kulturpflanzen und Sorteneigenschaften zu nennen.
Tipo: Journal paper Palavras-chave: Weed management; Soil tillage.
Ano: 2003 URL: http://orgprints.org/852/1/852%2Dschleu%C3%9F%2D2003%2Dunkrautregulierung%2Dbb.pdf
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Sumpfkresse – ein lästiges Wurzelunkraut breitet sich aus Organic Eprints
Koller, Martin.
Wurzelunkräuter – insbesondere diejenigen die sich über Wurzelausläufer ausbreiten – sind im biologischen Anbau besonders lästig. An der Forschungsanstalt ACW (Schweiz) wurden Versuche durchgeführt und Erfahrungen gesammelt, wie sich die Wilde Sumpfkresse mit mechanischen Massnahmen, wie der Scheibenegge zurückdrängen lässt.
Tipo: Newspaper or magazine article Palavras-chave: Soil tillage; Weed management.
Ano: 2011 URL: http://orgprints.org/19997/3/Koller%2D2011%2DSumpfkresse.doc
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Landtechnische Lösungen zur Beikrautregulierung im Ökolandbau Organic Eprints
In vielen Kulturen des ökologischen Pflanzenbaus sind die Arbeitserledigungskosten für die Unkrautregulierung eine der wesentlichen Kostenpositionen. Durch geeignete landtechnische Lösungen lässt sich der Handarbeitsaufwand reduzieren. Im Rahmen eines Fachgesprächs sollte erörtert werden, welche landtechnischen Lösungen für die mechanische und thermische Unkrautregulierung im ökologischen Landbau für welche Kulturen und welche Wachstumsstadien geeignet sind, so dass der Handarbeitsaufwand minimiert und das Wachstum der Kulturpflanze optimal unterstützt werden kann. In einer Diskussion mit Beratern, Praktikern, Wissenschaftlern und Herstellern sollte der weitere Forschungs- und Entwicklungsbedarf aufgezeigt werden. Das Fachgespräch fand am 27./28. Januar...
Tipo: Book Palavras-chave: Soil; Weed management.
Ano: 2011 URL: http://orgprints.org/19829/1/2657_Handbuch%20Unkraut%20LR.pdf
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Untersaaten in Kartoffeln: Reduzierung der Spätverunkrautung, Minderung hoher Restnitratmengen Organic Eprints
Stumm, Christoph; Köpke, Ulrich.
Kann im Ökologischen Kartoffelanbau die Verunkrautung bis zum Bestandesschluss mechanisch erfolgreich kontrolliert werden, so bleibt nach Absterben der Bestände durch Krautfäulebefall oder geringe Nährstoffnachlieferung das Problem der einsetzenden Spätverunkrautung. In früheren Untersuchungen von Kainz et al. (1997) und Haas (1999) wurde die Reduzierung von Nährstoffverlagerung und Erosion durch Untersaaten in Kartoffeln geprüft. Im Projekt „Leitbetriebe Ökologischer Landbau in Nordrhein-Westfalen“ wurde in den Jahren 2005 bis 2007 auf insgesamt acht Standorten die Wirkung verschiedener Untersaaten (u.a. Ölrettich, Senf , Buchweizen) zu unterschiedlichen Saatzeitpunkten („letztes Häufeln“ und „Beginn Krautfäule“) auf die Spätverunkrautung insbesondere mit...
Tipo: Report Palavras-chave: Weed management; Root crops; Crop husbandry.
Ano: 2008 URL: http://orgprints.org/7835/1/Beratungsinformation_Untersaaten_Kartoffeln.pdf
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Ukrudt i fugleperspektiv Organic Eprints
Rasmussen, Jesper; Harbo La-Cour, Anders.
The article describes the possibilities for weed monitoring by small Unmanned Aircraft Systems (UAS). It also describes the ASETA project, which is a multidisciplinary project combining cooperating airborne and ground-based vehicles with advanced sensors to identify the positions of weeds in agricultural fields.
Tipo: Newspaper or magazine article Palavras-chave: Weed management.
Ano: 2011 URL: http://orgprints.org/19315/3/19315.pdf
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Incompatibility between fertility building measures and the management of perennial weeds in organic cropping systems Organic Eprints
Melander, Bo; Rasmussen, Ilse A.; Olesen, Jørgen E..
Fertility building measures are important components in improving the productivity of organic cropping systems without livestock. However, some measures seem to be incompatible with the control of perennial weeds that can have adverse effects such as significant weed competition. The influence of fertility building measures (N2-fixing crops in the crop sequence, cover crops and manuring) and the abundance of perennial weeds were studied in a long-term crop rotation experiment at two locations in Denmark. The aim was to gain insight into the factors that influence the growth of perennial weed species occurring in mixed stands. Data were obtained from three cycles of four-year arable crop rotations comprising various cash crops in rotations with and...
Tipo: Journal paper Palavras-chave: Weed management.
Ano: 2016 URL: http://orgprints.org/29791/1/Published_paper.pdf
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Kontroll av potatisbladmögel inom ekologisk produktion Organic Eprints
Hannukkala, Asko; Lehtinen, Ari; Lindqvist, Bengt.
År 2003 startade ett forskningsprojekt, finansierat av Jord- och skogbruksministeriet, vars målsättning är att utveckla för ekologisk produktion lämpliga odlingstekniska metoder samt metoder som ökar odlingshygienen, för att kunna rå på potatisbladmögel och brunröta. Målsättningen är att sammanställa klara direktiv, för odling och åtgärder, med vars hjälp det, från år till år, är möjligt att producera ekologiskt odlad potatis av god kvalitet.
Tipo: Conference paper, poster, etc. Palavras-chave: Weed management.
Ano: 2004 URL: http://orgprints.org/11149/1/hannukkala.doc
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Reduktion des Unkrautdruckes durch die Etablierung von Untersaaten in Mais-Bohnen-Gemengen Organic Eprints
Fischer, Jenny; Böhm, Herwart.
Am Thünen-Institut für Ökologischen Landbau (Schleswig-Holstein, sL, 740 mm, 8,7°C) werden von 2014-2016 Parzellenversuche zum Gemengeanbau von Mais mit Phaseolus-Bohnen durchgeführt. In vorangegangen Versuchen hat sich gezeigt, dass Mais und Bohnen infolge der langsamen Jugendentwicklung nur eine sehr geringe Konkurrenzkraft gegenüber Unkräutern aufweisen. Daher erfolgt die Aussaat der Bohnen erst nach Abschluss der mechanischen Unkrautbekämpfung mit Striegel und Hacke, zum 4-Blattstadium (BBCH 14) des Maises. Da mechanische Unkrautbekämpfungsmaßnahmen nach der Aussaat der Bohnen kaum durchgeführt werden können, wird in einem Untersaatenversuch geprüft, ob die Etablierung einer zusätzlichen Untersaat den Unkrautdruck im Gemenge nachhaltig reduzieren kann....
Tipo: Conference paper, poster, etc. Palavras-chave: Crop combinations and interactions; Weed management.
Ano: 2016 URL: http://orgprints.org/31121/1/Fischer-B%C3%B6hm_2016_JKA452_Mais-Bohne-Untersaat.pdf
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VIDEO: Økologiske planteavlere kan med fordel så korn på større rækkeafstand 2 Organic Eprints
Bertelsen, Inger.
Som et led i projektet RowCrop har SEGES Økologi Innovation udført efterafgrødeforsøg, for at undersøge hvilke efterafgrøder, der er egnede til dette dyrkningssystem. Forskellige efterafgrøder er her udlagt efter henholdsvis en, to eller tre radrensninger. Forsøgene viste, at rødkløver er velegnet som efterafgrøde i rækkedyrkningssystemet, da den har god jorddækning i oktober, hvad enten den sås efter 1., 2., eller 3. radrensning. Samtidig giver den ikke udbyttetab eller høstbesvær i hovedafgrøden og har en god genvækst efter høst. Hør Inger Bertelsen, SEGES Økologi Innovation, fortælle om efterafgrødeforsøget.
Tipo: Video Palavras-chave: Production systems; Weed management; Farm nutrient management; Post harvest management and techniques.
Ano: 2018 URL: http://orgprints.org/34959/2/video.php_y%3Dhttps_%252F%252Fwww.youtube.com%252Fwatch_v%3DRiotBvspt_4%26feature%3Dyoutu.be
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