Estresse hídrico em diferentes fases da cultura da soja

Gava, Ricardo; Snyder, Richard L.; José, Jefferson Vieira; Fraga, E. F.; Perboni, Acácio

doi:10.7127/rbai.v9n600368

Cited by 27 publications

(30 citation statements)

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“…Representing an increase of 60% in relation to the no irrigated (rainfed) condition, corroborating with VIVAN, et al (2013) andGAVA et al (2015) that found increases in productivity of the same order of magnitude for soybean crop.…”

Section: Resultssupporting

confidence: 71%

“…As shown in Table 8, the mean mass of 100 grains of all cultivars planted in the irrigated area exceeded the means of those sown under no irrigated (rainfed ), corroborating with LUDWIG et al (2011) favorable conditions of water availability, tend to increase the grain mass. Grain mass is affected more strongly when water deficit occurs in the grain filling stage (GAVA et al, 2015), explaining the higher averages obtained in irrigated cultivation in relation to the rainfed. However, the mass of 100 grains was not affected by the plant population (Table 7).…”

Section: Resultsmentioning

confidence: 86%

“…The occurrence of water deficit only in the grain filling stage is so severe that the reduction of productivity is equivalent to the reduction with deficits occurring throughout the crop cycle (GAVA, et al, 2015). This is because the plant that suffers deficits from the initial stage adapts to the condition of soil moisture restriction during its cycle, whereas, plants grown in soil that has available water until the stage of grain filling, and at this stage suffers deficit, will result in larger reductions in grain mass and consequently in productivity (Figure 3), corroborating FLUMIGNAN et al 2015.…”

Section: Resultsmentioning

confidence: 99%

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Different Soybean Plant Populations Under Central Pivot Irrigation

et al. 2017

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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 IPRO, Anta 82 RR, M 7110 IPRO, Desafio RR and M 7739 IPRO. Populations indicated by the holders of the seeds were tested, and also population 20% above and 20% below with the hypothesis that in different humidity conditions, different cultivars may have different answers depending on their populations. In rainfed condition productivity and mass of one hundred grains were influenced by water deficit. Cultivar Desafio RR presented the best performance under irrigation, with productivity of 6174 kg ha -1 .

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Section: Resultssupporting

confidence: 71%

Section: Resultsmentioning

confidence: 86%

Section: Resultsmentioning

confidence: 99%

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Different Soybean Plant Populations Under Central Pivot Irrigation

et al. 2017

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“…However, the choice on the best cultivar may not always result in high yields, as reported by Gava et al (2015), who observed that water deficit is a factor that must be taken into consideration in the management of this crop, because it can cause a drastic reduction in yield when it occurs during crop cycle or even in grain filling.…”

Section: Introductionmentioning

confidence: 99%

Water depths for different soybean cultivars in center pivot

Gava

Lima

Santos

et al. 2018

Rev. bras. eng. agríc. ambient.

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A B S T R A C TReductions in soybean yields are mainly linked to the occurrence of dry spells, which are becoming more frequent due to climate change. Thus, the aim of this study was to evaluate soybean cultivars irrigated with different water depths under center pivot. The experiment was conducted during the 2014/15 growing season, under center-pivot irrigation in Chapadão do Sul, MS, Brazil. The design was a randomized block in split plot with four replicates, where plots consisted of 4 water depths (0, 50, 75 and 100% of crop evapotranspiration -ETc) and the subplots of 6 soybean cultivars (NA 5909 RR, DM 5958 IPRO, Anta 82 RR, M 7110 IPRO, Desafio RR, M 7739 IPRO). The cultivar Desafio RR was the one that best responded to irrigation, increasing yield to 6174 kg ha -1 against 3798 kg ha -1 under rainfed condition. The highest yield under rainfed condition was obtained by the cultivar NA 5909 RR, reaching 4806 kg ha -1 . This shows that some cultivars can respond positively to irrigation, resulting in increased yield, depending on the genetic characteristics of each one.Lâminas de irrigação para diferentes cultivares de soja em pivô central R E S U M O As reduções de produção de soja no Brasil estão ligadas principalmente à ocorrência de veranicos, os quais estão cada vez mais frequentes devido às mudanças climáticas. Sendo assim, objetivou-se com este trabalho avaliar diferentes lâminas de irrigação em cultivares de soja irrigadas em pivô central. O trabalho foi realizado no ano agrícola 2014/15, no município de Chapadão do Sul, MS. O delineamento foi em blocos casualizados em esquema de parcelas subdivididas com quatro repetições, onde as parcelas constaram de 4 lâminas de irrigação (0, 50, 75 e 100% da Evapotranspiração da Cultura -ETc), e as subparcelas de 6 cultivares de soja (NA 5909 RR, DM 5958 IPRO, Anta 82 RR, M 7110 IPRO, Desafio RR, M 7739 IPRO). A cultivar Desafio RR foi a que mais respondeu à irrigação, alcançando produtividade de 6174 kg ha -1 com a reposição de 50% da ETc, contra 3798 kg ha -1 na condição de sequeiro. A maior produtividade no sequeiro foi com a cultivar Na 5909 RR, chegando a 4806 kg ha -1 , indicando que a resposta da cultura à irrigação está relacionada principalmente às características genéticas de cada cultivar. Key words:Glycine max (L.) Merrill. drought water deficit Palavras-chave:Glycine max (L.) Merrill. veranico déficit hídrico 1 Universidade Federal do Mato Grosso do Sul. Chapadão do Sul, MS.

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“…O uso de estratégias de irrigação como o déficit hídrico controlado, pode reduzir a utilização de água e de energia elétrica sem prejudicar a produtividade (GAVA et al, 2015).…”

Section: Introductionunclassified

Produção E Características Dos Frutos De Coqueiro-Anão Sob Diferentes Lâminas De Irrigação

Bezerra¹,

Farias²,

Miranda³

et al. 2017

Anais Do IV Inovagri International Meeting - 2017

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RESUMO:O trabalho teve como objetivo avaliar a produção e a qualidade de frutos de coqueiro-anão (Cocos nucifera L) produzidos em condições orgânicas e sob diferentes lâminas de irrigação no litoral Cearense. Os tratamentos consistiram na aplicação de lâminas de diferentes frações de evapotranspiração do coqueiro (T1 50%, T2 75%, T3 100%, T4 125%).O experimento foi de blocos casualizados com 5 repetições de quatro plantas cada, irrigadas por micro-aspersão. As plantas foram avaliadas mensalmente quanto ao número de frutos por cacho, peso dos frutos, volume de água por fruto e teor de sólidos solúveis na água, sempre utilizando o cacho 7. Durante a estação chuvosa (fevereiro-maio) houve aumento no peso e no volume da água dos frutos e diminuição no ºbrix da água no mesmo período. Em relação a produção de frutos foram observados dois picos de produção ao longo do ano, com produtividade média de 6 frutos/cacho em cada coleta. Considerando os meses em que se aplicaram os tratamentos hídricos, não houve diferença entre os mesmos com relação ao peso dos frutos, enquanto houve aumento do volume de água produzida com o aumento da lâmina de irrigação. O número de frutos praticamente não foi afetado pelos tratamentos. PALAVRAS-CHAVE: Cocos nucifera L, produção de frutos, evapotranspiração YIELD AND FRUIT CHARACTERISTICS OF DWARF COCONUT UNDER DIFFERENT IRRIGATION LEVELS SUMMARY:The objective of this work was to evaluate the production and quality of (Cocos nucifera L.) fruits produced under organic conditions and under different irrigation layers in the

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Estresse hídrico em diferentes fases da cultura da soja

Cited by 27 publications

References 0 publications

Different Soybean Plant Populations Under Central Pivot Irrigation

Different Soybean Plant Populations Under Central Pivot Irrigation

Water depths for different soybean cultivars in center pivot

Produção E Características Dos Frutos De Coqueiro-Anão Sob Diferentes Lâminas De Irrigação

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