Evapotranspiration and crop coefficient for sprinkler-irrigated cotton crop in Apodi Plateau semiarid lands of Brazil

Bezerra, Bergson Guedes; Silva, Bernardo Barbosa da; Bezerra, J. R. C.; Sofiatti, Valdinei; Santos, Carlos Antônio Costa dos

doi:10.1016/j.agwat.2012.01.013

Cited by 46 publications

(56 citation statements)

References 41 publications

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“…The calibrated basal crop coefficient K cb ini " 0.20 was higher than the value of 0.15 (Table 4) proposed by Allen et al [12]. In fact, K cb ini is sensitive to irrigation management [16]. In our study area flood irrigation is usually implemented for approximately two weeks before sowing which rapidly increases the soil moisture and, thus, evaporation.…”

Section: Crop Coefficientsmentioning

confidence: 38%

Partitioning of Cotton Field Evapotranspiration under Mulched Drip Irrigation Based on a Dual Crop Coefficient Model

Tian

Yang

et al. 2016

Water

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Estimation of field crop evapotranspiration (ET c ) and its partitioning into evaporation and transpiration, are of great importance in hydrological modeling and agricultural water management. In this study, we used a dual crop coefficient model SIMDualKc to estimate the actual crop evapotranspiration (ET c act ) and the basal crop coefficients over a cotton field in Northwestern China. A two-year field experiment was implemented in the cotton field under mulched drip irrigation. The simulated ET c act is consistent with observed ET c act as derived based on the eddy covariance system in the field. Basal crop coefficients of cotton for the initial, mid-season, and end-season are 0.20, 0.90, and 0.50, respectively. The transpiration components of ET c act are 96% (77%) and 94% (74%) in 2012 and 2013 with (without) plastic mulch, respectively. The impact of plastic mulch cover on soil evaporation is significant during drip irrigation ranging from crop development stage to mid-season stage. The extent of the impact depends on the variation of soil moisture, available energy of the soil surface, and the growth of the cotton leaves. Our results show that the SIMDualKc is capable of providing accurate estimation of ET c act for cotton field under mulched drip irrigation, and could be used as a valuable tool to establish irrigation schedule for cotton fields in arid regions as Northwestern China.

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Section: Crop Coefficientsmentioning

confidence: 38%

Partitioning of Cotton Field Evapotranspiration under Mulched Drip Irrigation Based on a Dual Crop Coefficient Model

Tian

Yang

et al. 2016

Water

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“…According to Brito et al (2011), the reproductive phases coincide with stages where crop water requirements increased, with water consumption varying between 2.5 and 6 mm day -1 (BEZERRA et al, 2010). Therefore, water deficit in this specific phase has more severe consequences that in other development phases.…”

Section: Resultsmentioning

confidence: 99%

Cotton Response to Water Deficits at Different Growth Stages

et al. 2017

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-Water deficit at certain cotton growth stages can cause severe damage to crop development, affecting physiological processes and reducing reproductive structures, with consequent yield losses. The objective of this study was to evaluate the response of cotton cultivars under water deficit applied at different stages of the crop cycle. We compared the number of bolls per meter, cotton yield, and water use efficiency for eight different cotton cultivars under a water deficit of 15 days. We selected the following growth stages: Emergence (EM), First Square (FS), First Flower (FL), Peak Bloom (PB), and First Open Boll (FOB). The control treatment was irrigated with 100% ETc. The experiment was conducted in Apodi, RN State of Brazil, semiarid region, using a sprinkler irrigation system. The number of bolls per meter, cotton yield, and water use efficiency were influenced by the interaction of cultivars x deficit periods. Lowest values were observed for water suppression in the FL and PB stages. When the water deficit was imposed in the initial stages of growth (EM to FS) or after the FOB stage, the cotton yield reduction was not significant. At the same stage and water deficit, the behavior of the different cultivars was similar. Producers are urged to take this information into account when developing irrigation schemes for cotton crops, thereby avoiding water deficits during the most critical periods of the crop cycle.Key words: Irrigation Management. Shedding. Semiarid. RESPOSTA DO ALGODOEIRO AO DÉFICIT HÍDRICO EM DIFERENTES FASES DE CRESCIMENTORESUMO -O déficit hídrico em determinadas fases do ciclo de cultivo do algodoeiro pode causar severos danos, afetando as estruturas reprodutivas, acarretando perda na produtividade. O objetivo deste trabalho foi avaliar a resposta de cultivares de algodoeiro submetidas ao déficit hídrico em diferentes fases do ciclo de cultivo. Comparou-se o número de capulhos por metro, a produtividade e a eficiência no uso da água em oito cultivares de algodoeiro herbáceo, submetidas a déficit hídrico por 15 dias nos estádios: emergência, emissão do primeiro botão floral, emissão da primeira flor, emissão da primeira maçã, abertura do primeiro capulho e a testemunha irrigada com 100% da ETc. O experimento foi instalado no município de Apodi-RN, região Semiárida do Nordeste, em área irrigada por aspersão. O número de capulhos por metro, a produtividade de algodão em caroço e a eficiência de uso da água foram influenciadas pela interação cultivares x déficit hídrico. Os piores resultados foram observados para o déficit hídrico de 15 dias após a emissão da primeira maçã e da primeira flor. Quando o déficit hídrico foi imposto nas fases de crescimento inicial, após a emissão do primeiro botão floral e após a abertura do primeiro capulho, a perda de produtividade não foi significativa. Dentro de um mesmo período de déficit hídrico, as cultivares se comportaram de maneira similar. Os produtores devem levar essa informação em consideração para ouso da irrigação suplementar e para progr...

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“…This reduction is related to the temperature influence on evapotranspiration (Bezerra et al, 2012). Temperature increase is expected to enhance plant water demand, with direct influence on climatic risk.…”

Section: Resultsmentioning

confidence: 99%

Impacts of climate change on the agricultural zoning of climate risk for cotton cultivation in Brazil

Assad

Martins

Beltrão

et al. 2013

Pesq. agropec. bras.

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-The objective of this work was to evaluate the effect of the temperature increase forecasted by the Intergovernmental Panel on Climate Change (IPCC) on agricultural zoning of cotton production in Brazil. The Northeastern region showed the highest decrease in the low-risk area for cotton cultivation due to the projected temperature increase. This area in the Brazilian Northeast may decrease from 83 million ha in 2010 to approximately 71 million ha in 2040, which means 15% reduction in 30 years. Southeastern and Center-Western regions had small decrease in areas suitable for cotton production until 2040, while the Northern region showed no reduction in these areas. Temperature increase will not benefit cotton cultivation in Brazil because dimension of low-risk areas for economic cotton production may decrease.Index terms: Gossypium hirsutum, evapotranspiration, global warming. Impactos das mudanças climáticas no zoneamento agrícola de risco climático para o cultivo de algodão no BrasilResumo -O objetivo deste trabalho foi avaliar o efeito do aumento na temperatura, previsto pelo Painel Intergovernamental de Mudanças Climáticas (IPCC), sobre o risco climático para a produção de algodão no Brasil. O aumento previsto na temperatura fez com que a região Nordeste apresentasse a maior redução na área de baixo risco para cultivo de algodão, em comparação com as demais regiões do país. Essa área pode diminuir de 83 milhões de ha no ano de 2010 para aproximadamente 71 milhões de ha em 2040, o que significaria 15% de redução em 30 anos. As regiões Sudeste e Centro-Oeste apresentam pequena redução nas áreas aptas para o cultivo de algodão até 2040, enquanto a região Norte não teve redução nessas áreas. A elevação das temperaturas não é benéfica para a produção do algodão no Brasil porque a área de baixo risco para o cultivo econômico pode diminuir.Termos para indexação: Gossypium hirsutum, evapotranspiração, aquecimento global.

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Evapotranspiration and crop coefficient for sprinkler-irrigated cotton crop in Apodi Plateau semiarid lands of Brazil

Cited by 46 publications

References 41 publications

Partitioning of Cotton Field Evapotranspiration under Mulched Drip Irrigation Based on a Dual Crop Coefficient Model

Partitioning of Cotton Field Evapotranspiration under Mulched Drip Irrigation Based on a Dual Crop Coefficient Model

Cotton Response to Water Deficits at Different Growth Stages

Impacts of climate change on the agricultural zoning of climate risk for cotton cultivation in Brazil

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