Crop coefficient for drip-irrigated cotton in a Mediterranean environment

Farahani, Hamid J.; Oweis, Theib; Izzi, Gabriella

doi:10.1007/s00271-007-0101-0

Cited by 53 publications

(46 citation statements)

References 14 publications

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“…ET o can be readily obtained by the FAO Penman-Monteith equation using standard meteorological data. On the other hand, K c is often adopted from previous studies or from generalized K c curves Farahani et al, 2008 . However, the use of standard or generalized K c values under non-standard pedo-climatic and management conditions, i.e., conditions significantly different from those of standard/ generalized K c determination, can lead to significant errors in the calculation of ET c Shukla et al, 2013 .…”

Section: Introductionmentioning

confidence: 99%

Characteristics and influencing factors of crop coefficient for drip-irrigated cotton under plastic-mulched condition in arid environment

Yang

Wang

et al. 2018

J. Agric. Meteorol.

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Crop coefficient K c is a very useful and widely used variable in evapotranspiration estimation in cropland. Traditional methods in calculating K c are based on field water balance, which is limited by long measurement interval and small study area. In addition, there is the need for K c under new agronomy practice such as plastic mulching and drip irrigation in arid environments. This study calculated and analyzed K c of a drip-irrigated and plastic-mulched cotton field in Aksu Oasis of the arid Tarim River Basin, China, and its relationships with several crop-, soil-and management variables such as relative growth days RGD , leaf area index LAI , extractable soil water ESW , and irrigation, based on two years' observations. The results showed that daily K c varied within the range of 0.08 1.28, with an average of 0.54 for the entire cotton growth season, in 2013 and 2014. Compared to non-mulched condition already published, the K c of mulched cotton for the entire growth season decreased by 16 to 39 . The largest reductions in K c due to plastic mulch were found in the initial and developmental growth stage. K c could be calculated by a third-degree polynomial model in relation to RGD, which was satisfactorily validated and can be used in other studies under the same or similar pedo-climatic and management conditions. Cotton LAI and ESW were found to be important factors influencing K c , particularly their critical values of 3.0 in LAI and 0.5 for ESW. Moreover, the results showed that irrigation significantly increased K c , i.e., 29 on average, partly due to arid advection. This study provided up-to-date and detailed information on cotton crop coefficient under plastic mulching and drip irrigation conditions in arid environment, and it is useful for improved management of agricultural water resources.

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Section: Introductionmentioning

confidence: 99%

Characteristics and influencing factors of crop coefficient for drip-irrigated cotton under plastic-mulched condition in arid environment

Yang

Wang

et al. 2018

J. Agric. Meteorol.

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“…Cotton for mitigating the impact of climatic aberrations. Proper irrigation scheduling is prime requirement for on farm water management 3 …”

Section: Introductionmentioning

confidence: 99%

Crop Coefficient for Mulched Cotton Under Variable Irrigation Regimes

Prajapati

Subbaiah

Kunapara

et al. 2016

Curr. World Environ

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Reduced cost of cultivation (30%) and increase in yield (40%) obliged the Saurashatra farmers to adopt Bt. Cotton on mass scale. Saurashtra cotton earns more profit at international market due to good luster, low naps, more wax on fibers surface, very low dye absorption. High evaporative conditions, scarcity of groundwater, and deficient rainfall condition are detrimental to cotton yields. Climatic change is adding another dimension to this complex nexus of soil-water-plant-atmosphere. Adverse environmental conditions coupled with water scarcity intrigued farmers of this region to adopt drip irrigation with mulch in Bt. Cotton for mitigating the impact of climatic aberrations. Determination of actual crop evapotranspiration during crop growing season is highly advantageous for sound irrigation scheduling. So far no study is reported to develop crop coefficient for drip irrigated biodegradable mulch cotton subjected to variable irrigation regimes. An experiment was undertaken consecutively for two years (2013-14 and 2014-15) to address this issue. Diurnal and temporal variation of soil moisture with depth was monitored using soil moisture sensors at irrigation regimes 1.0 IW/ETc and 0.8 IW/ETc. The control treatment was taken as drip with no mulch. Adjusted FAO K c predict higher value than sensor based K c values at both irrigation regimes. Sensor based K c-mid values were lower by 12.99% and 30.04% than the adjusted FAO K c-mid value at 1.0 IW/ET c and 0.8 IW/ET c respectively. Biodegradable plastic mulch reduced K c-ini value by 72.26% and 66.54% over control at 1.0 IW/ET c and 0.8 IW/ET c respectively. Overestimated adjusted FAO K c values caused a loss of 78.13mm and 66.54mm of precious water at 1.0 IW/ET c and 0.8 IW/ET c respectively. This study admonishes blind adoption of published FAO K c curves, for mulch conditions.

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“…O ciclo de desenvolvimento do algodoeiro, cultivar BRS-200 Marrom, em seu primeiro ano de cultivo foi completado aos 105 dias após a emergência, caracterizando uma cultivar de ciclo curto (Bezerra et al, 2008). Rodrigues (2003) no algodoeiro herbáceo cultivar BRS 201; este comportamento pode estar associado às variações da demanda atmosférica que influenciam o processo, caracterizada pela radiação solar global, efeito da velocidade do vento e da umidade relativa, conforme referido por Farahani et al (2008) e Rosenberg et al (1983) e que pode ser visualizado na Figura 2 (A, B e C). Segundo Souza (2003), variações na taxa de evapotranspiração diária durante a mesma fase fenológica podem ser decorrentes das condições meteorológicas locais e da duração da referida fase.…”

Section: Resultsunclassified

“…Determinou-se o coeficiente de cultura (Kc) com base na relação, recomendada por Farahani et al (2008) …”

Section: Introductionunclassified

Evapotranspiração e coeficiente de cultivo do algodoeiro BRS-200 Marrom, irrigado

Bezerra

Azevedo²,

Silva³

et al. 2010

Rev. bras. eng. agríc. ambient.

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RESUMOExperimento conduzido na Embrapa, em Barbalha, CE, nos anos de 2003 e 2005, objetivou a estimativa da evapotranspiração da cultura e do coeficiente de cultivo do algodoeiro BRS-200 Marrom. Sensores de radiação solar global; saldo de radiação; temperatura do ar (bulbos seco e úmido) e velocidade do vento nos níveis de 0,30 e 1,50 m acima da copa da cultura e fluxo de calor no solo foram instalados e os dados coletados por um sistema automático de aquisição de dados. A evapotranspiração da cultura (ET c ) e a evapotranspiração de referência (ET o

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Crop coefficient for drip-irrigated cotton in a Mediterranean environment

Cited by 53 publications

References 14 publications

Characteristics and influencing factors of crop coefficient for drip-irrigated cotton under plastic-mulched condition in arid environment

Characteristics and influencing factors of crop coefficient for drip-irrigated cotton under plastic-mulched condition in arid environment

Crop Coefficient for Mulched Cotton Under Variable Irrigation Regimes

Evapotranspiração e coeficiente de cultivo do algodoeiro BRS-200 Marrom, irrigado

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