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Aspectos nutricionais e fisiológicos em genótipos de soja com diferentes níveis de tolerância à restrição hídrica. Repositório Alice
CEREZINI, P.; FAGOTTI, D. dos S. L.; KUWANO, B. H.; SOUZA, D. I.; PÍPOLO, V. C.; PIPOLO, A. E.; HUNGRIA, M.; NOGUEIRA, M. A..
A fixação biológica de nitrogênio (FBN) é indispensável para a viabilidade da cultura da soja em termos econômicos e ambientais. Entretanto, a ocorrência de veranicos prejudica a cultura e a FBN. O objetivo desse trabalho foi avaliar aspectos nutricionais e fisiológicos em genótipos de soja com capacidade de manter a FBN em condições de restrição hídrica (30% CC), em comparação com a condição normal (70% CC). O experimento foi conduzido em delineamento inteiramente casualizado em esquema fatorial 5 × 2, com sete repetições, com as linhagens R01-581F, R01-416F, R02-1325, com capacidade de manter a FBN em condições de seca, e os padrões CD 215 e BRS 317, sob suprimento adequado de água (70% CC), ou sob restrição hídrica (30% CC) entre 45 e 55 dias....
Tipo: Parte de livro Palavras-chave: Soja; Fixação de nitrogênio; Deficiência hídrica; Relação água-planta; Soybeans; Plant-water relations; Deficit irrigation; Nitrogen fixation.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/934623
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Calibrating and validating AquaCrop model for maize crop in Northern zone of Nigeria CIGR Journal
Ezekiel, Oiganji; Igbadun, H. E.; Mudiare, O.J.; Oyebode, M.A..
Farmers in the northern Guinea Savannah ecological zone of Nigeria have been experiencing declining crop yield due to erratic water supply. In recent times, research on better water management and interaction between effects of climate, soil and field management on crop production is fast gaining grounds with the use of models. Models can be used to predict the impact of long-term climate variability, thus providing an opportunity of better techniques compared with the traditional multi-location trials. This study presents the calibration and validation of AquaCrop model for drip irrigated maize (Zea mays). Calibration was done using data of 2013, while validation across seasons was done with data of 2014. The modelling efficiency of grain yield, biomass...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural Engineering/ soil and water conservation engineering growth stage; Deficit irrigation; Drip irrigation; Water management; Modelling.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3755
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DIFFERENT SOYBEAN PLANT POPULATIONS UNDER CENTRAL PIVOT IRRIGATION REA
Gava,Ricardo; Anselmo,Jefferson L.; Neale,Christopher M. U.; Frizzone,José A.; Leal,Aguinaldo J. F..
ABSTRACT Planting density can influence the competitiveness among plants mainly by water, nutrients and solar radiation, directly affecting yield. The purpose of this study was to evaluate the productivity of different soybean cultivars at different planting populations under irrigated and rainfed conditions. The experiment was conducted during the 2014/15 growing season, under center pivot irrigation in Chapadão do Sul – MS, Brazil. The experimental design was randomized complete block design with split-plot, as follows: Irrigated and Rainfed (plots) x Six cultivars (subplots) x Three Plant Populations (sub-subplots) with 4 replications. The irrigation management was realized by Penman-Monteith-FAO method. The cultivars used were: NA 5909 RR, DM 5958...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Plant density; Irrigated Soybean; Deficit irrigation; Soybean Yield.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300441
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Efeito da irrigação com déficit sustentado e secagem parcial do sistema radicular em coqueiro-anão. Infoteca-e
MOREIRA, C. G.; SILVA, J. B. DA; MIRANDA, F. R. de; BEZERRA, M. A.; CABRAL, J. E. de O.; ROCHA, A. B. DA. S.; GUIMARÃES, V. B..
O estudo objetivou determinar a produtividade, os custos, as receitas e a produtividade da água de irrigação (PAI) do coqueiro-anão irrigado por gotejamento e microaspersão, sob diferentes níveis de irrigação deficitária e secagem parcial do sistema radicular (PRD).
Tipo: Folhetos Palavras-chave: Irrigação deficitária; Produtividade da água de irrigação; Irrigation water productivity; Cocos Nucifera; Água de Irrigação; Produtividade; Deficit irrigation; Cocos (Arecaceae).
Ano: 2022 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1145483
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EFFECTS OF SALINE WATER ON TOMATO UNDER SUBSURFACE DRIP IRRIGATION: NUTRITIONAL AND FOLIAR ASPECTS J. Soil Sci. Plant Nutr.
Kahlaoui,B; Hachicha,M; Rejeb,S; Rejeb,M.N; Hanchi,B; Misle,E.
A field experiment on the effects of drip irrigation (DI) and subsurface drip irrigation (SDI) with saline water (6.57 dS m-1) on three tomato cultivars (Lycopersicon esculentum Mill., cvs. Rio Tinto, Rio Grande and Nemador) was carried out with the purpose to quantify physiological responses. The aim was to improve irrigation water management under saline conditions of Tunisia. The trial was established in a silt-clayey soil with three regimes of irrigation: 100 %, 85 % and 70 % of crop water requirement. Results evidenced a significant difference between the two irrigation systems for the three cultivars. Growth parameters such as leaf area, chlorophyll content and mineral composition of leaves, petioles, stems and roots were affected significantly by...
Tipo: Journal article Palavras-chave: Salt tolerance; Tomato; Localized irrigation; Deficit irrigation; Tunisia.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162011000100007
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Growth of black pepper plantlets under different substrates and irrigation levels Scientia Agricola
Cruz,Eleandro Silva da; Medici,Leonardo Oliveira; Leles,Paulo Sérgio dos Santos; Ambrozim,Clodoaldo Spadeto; Souza,Wendell Luccas; Carvalho,Daniel Fonseca de.
ABSTRACT Optimization of the use of water and the possibility of using residues as substrate in the black pepper production chain can yield economic and environmental benefits. The objective of this study was to evaluate the biometric and physiological traits of black pepper plantlets (Piper nigrum L.), cv. Bragantina, at different irrigation levels and soilless substrates. Plantlets were grown for 120 days on three substrates [biosolid + crushed coconut fiber (3:1, by volume); biosolid + granitic rock powder (3:1, by volume); and biosolid + crushed coconut fiber + granitic rock powder (2:1:1, by volume)] and at five irrigation levels [36 % (very low); 55 % (low); 85 % (moderate); 100 % (well-irrigated); and 126 % of the reference irrigation level...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Piper nigrum L; Deficit irrigation; Potting mix; Biosolid; Granitic rock powder.
Ano: 2022 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162022000100601
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Introducing deficit irrigation crop techniques derived by crop growth models into a Positive Mathematical Programming model AgEcon
Severini, Simone; Cortignani, Raffaele.
There is a growing policy pressure to reduce water use in agriculture when this generates sufficiently large environmental benefits and increases the well-being of other water users. Several analysis investigate farmers’ response to water policy by means of mathematical programming models including Positive Mathematical Programming (PMP). The originals PMP methods refer only to activities observed in the reference period. However, under the pressure of new water policies, farmers can adjust not only their cropping patterns but also the irrigation techniques they use. In particular, they could introduce water deficit irrigation crop techniques that were not profitable in past conditions. This paper proposes an extension of the Röhm and Dabbert approach...
Tipo: Conference Paper or Presentation Palavras-chave: Positive mathematical programming; Water policies; Deficit irrigation; Crop Production/Industries.
Ano: 2008 URL: http://purl.umn.edu/44010
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Irrigation Water Management in Latin America Chilean J. Agric. Res.
de Oliveira,Aureo S; Trezza,Ricardo; Holzapfel,Eduardo; Lorite,Ignacio; Paz,Vital Pedro S.
Latin American countries show a great potential for expanding their irrigated areas. Irrigation is important for strengthening local and regional economy and for enhancing food security. The present paper aimed at providing a brief review on key aspects of irrigation management in Latin America. Poor irrigation management can have great impact on crop production and on environment while good management reduces the waste of soil and water and help farmers maximizing their profits. It was found that additional research is needed to allow a better understanding of crop water requirements under Latin American conditions as well as to provide farmers with local derived information for irrigation scheduling. The advantages of deficit irrigation practices and the...
Tipo: Journal article Palavras-chave: Irrigation; Evapotranspiration; Deficit irrigation; Remote sensing.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000500002
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Production of drip irrigated squash (Cucurbita Pepo, L.) under different levels of irrigation and uniformity CIGR Journal
Elnemr, Moataz Kamal; Elmetwalli, Adel Helal.
This study aimed to get the most possible benefit of using deficit irrigation to maximize water productivity of squash, besides investigating the ability of drip irrigation uniformity to reduce the effect of deficit irrigation on squash crop production (Cucurbita pepo - Hybrid Revera). Three levels of irrigation uniformity levels (UL) based on the value of uniformity coefficient (UC) namely excellent (E), very good (VG), and unacceptable (UA) were examined with three irrigation levels based on crop evapotranspiration (ETc) which were full irrigation (FI or 100% ETc) to be compared to two defecit irrigation levels 90% ETc (DI90), and 80% ETc (DI80). Results showed that both UL and DI had significant effect on squash production. There was significant...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Deficit irrigation; Drip irrigation; Levels; Production; Squash; Uniformity..
Ano: 2021 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6277
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Respostas agronômicas e fisiológicas de genótipos de amendoim forrageiro submetidos ao déficit hídrico. Repositório Alice
MENDONÇA, M. S. de.
A obtenção de genótipos de amendoim forrageiro mais produtivos em condições de menor disponibilidade hídrica é um grande desafio para os melhoristas, em função da complexidade dos mecanismos de tolerância à seca associada com a falta de critérios de seleção bem definidos para esta espécie. O objetivo deste estudo foi avaliar as respostas agronômicas e fisiológicas em genótipos de amendoim forrageiro submetidos ao déficit hídrico, assim como analisar a eficiência dos métodos empregados e identificar os caracteres mais adequados para seleção dos genótipos. Foram realizados dois experimentos, conduzidos em casa telada na Embrapa Acre. No Experimento 1, foram avaliados quatro genótipos de amendoim forrageiro com desempenhos agronômicos distintos e conhecidos...
Tipo: Teses Palavras-chave: Amendoim forrageiro; Forage peanut; Cacahuetes forrajeros; Leguminosas forrajeras; Interacción genotipo-ambiente; Irrigación deficitaria; Rendimiento de los cultivos; Embrapa Acre; Rio Branco (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Leguminosa Forrageira; Genótipo; Disponibilidade de Água; Rendimento; Campo Experimental; Forage legumes; Genotype-environment interaction; Deficit irrigation; Crop yield.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1127366
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Sensoriamento remoto como suporte ao monitoramento do déficit hídrico na cultura da soja. Repositório Alice
CRUSIOL, L. G. T.; NANNI, M. R.; FURLANETTO, R. H.; SIBALDELLI, R. N. R.; MERTZ-HENNING, L. M.; NEPOMUCENO, A. L.; NEUMAIER, N.; FARIAS, J. R. B..
Tipo: Parte de livro Palavras-chave: Soja; Deficiência Hídrica; Sensoriamento Remoto; Soybeans; Deficit irrigation; Remote sensing.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1093188
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Simulação do efeito da irrigação na produção do capim-zuri sob diferentes níveis de adubação utilizando modelo agrometereológico. Repositório Alice
GHEDIN, G. M.; CRUZ, P. G. da; SALMAN, A. K. D.; BEZERRA, W. S. M.; SOUZA, E. C. de.
A irrigação é uma prática que permite suplementar a falta de água no solo em períodos de escassez. O objetivo desse estudo foi avaliar a estimativa de produção de matéria seca (MS) do capim-zuri (Panicum maximum cv. BRS Zuri) simulando condição sem déficit hídrico (sistema irrigado) e com déficit hídrico (não irrigado), sob três níveis de adubação durante o período seco dos anos de 2018 e 2019 em Porto Velho-RO.
Tipo: Anais e Proceedings de eventos Palavras-chave: Panicum maximum cv BRS Zuri; Porto Velho (RO); Rondônia; Amazônia Ocidental; Western Amazon; Gramínea Forrageira; Irrigação; Matéria Seca; Adubação; Estiagem; Temperatura; Rendimento; Forage grasses; Irrigation management; Deficit irrigation; Irrigation; Fertilizers; Dry season; Temperature; Crop yield.
Ano: 2021 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1139587
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Water productivity for sugar and biomass of sugarcane varieties AGRIAMBI
Leal,Daniel P. V.; Coelho,Rubens D.; Barbosa,Fernando da S.; Fraga Júnior,Eusimio F.; Mauri,Robson; Santos,Lucas da C..
ABSTRACT The aim of this study was to evaluate the water productivity into biomass and into sugar for 23 sugarcane varieties (second ratoon crop) under two levels of drip irrigation. Two experiments were conducted in a greenhouse. Experiment 1 comprised nine sugarcane varieties grown in a clay soil and Experiment 2 was composed of 14 varieties in a sandy-loam soil. Moreover, two irrigation treatments were adopted: T100 - full irrigation with 100% crop evapotranspiration replacement, maintaining soil moisture near field capacity for each variety; and T70 - irrigation with 70% T100 water depth. Water productivity was evaluated in terms of stem fresh biomass (WPFB) and sugar (WPGSY). The results showed that WPFB ranged from 11.45 to 18.45 kg m-3. The highest...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Deficit irrigation; Second ratoon; Evapotranspiration.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000900618
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Water relations of field-grown grapevines in the São Francisco Valley, Brazil, under different rootstocks and irrigation strategies Scientia Agricola
Souza,Claudia Rita de; Bassoi,Luís Henrique; Lima Filho,José Moacir Pinheiro; Silva,Fabrício Francisco Santos da; Viana,Leandro Hespanhol; Dantas,Barbara França; Pereira,Maiane Santos; Ribeiro,Paula Rose de Almeida.
There is an increased demand for high quality winegrapes in the São Francisco Valley, a new wine producing area in Brazil. As the grape quality is closely linked to the soil water status, understanding the effects of rootstock and irrigation management on grapevine water relations is essential to optimize yield and quality. This study was carried out to investigate the effects of irrigation strategies and rootstocks on water relations and scion vigour of field-grown grapevines in Petrolina, Pernambuco state, Brazil. The cultivars used as scions are Moscato Canelli and Syrah, both grafted onto IAC 572 and 1103 Paulsen rootstocks. The following water treatments were used: deficit irrigation, with holding water after veraison; and partial root-zone drying,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vitis vinifera L.; Partial rootzone drying; Deficit irrigation; Stomatal conductance.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000400002
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Yield, quality and drought sensitivity of tomato to water deficit during different growth stages Scientia Agricola
Cui,Jintao; Shao,Guangcheng; Lu,Jia; Keabetswe,Larona; Hoogenboom,Gerrit.
ABSTRACT In areas where the supply of water for irrigation is limited, tomato production is often subject to drought stress. In order to investigate the drought sensitivity of tomato (Lycopersicon esculentum Mill.) yield and quality during different growth stages, field and pot experiments were conducted in a high tunnel in southern China during the 2013 and 2016 growing seasons. The experiments consisted of four treatments. Crops were drip-irrigated to 100 % of field capacity at all growth stages divided into treatment T1 (control) and the treatment group T2, T3 and T4 receiving half the amount of irrigation as T1 when the soil water content reached 70 % of field capacity, the vegetative phase (stage I) T2, the flowering and fruit development phase (stage...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Deficit irrigation; Sensitivity index; Irrigation management; High tunnel.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000200601
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