SH K; R A; M S
Abstract
With population growing throughout the world, it is necessary to optimize water use,especially in agricultural lands. In order to conduct technical and economical evaluation ofdrip and furrow irrigation methods under deficit irrigation of cotton, a field experiment wascarried out during 2010 growing ...
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With population growing throughout the world, it is necessary to optimize water use,especially in agricultural lands. In order to conduct technical and economical evaluation ofdrip and furrow irrigation methods under deficit irrigation of cotton, a field experiment wascarried out during 2010 growing season at experimental farm of Orzoueyeh Agricultural andNatural Resources Research Center in Kerman province. The treatments were laid out in splitplot a randomized complete block design (RCBD) with three replications. The treatmentscomprised of three levels of irrigation including 100% (control), 80%, and 60 percent of cropwater requirement and were allocated to the main plot and two irrigation systems, consistingof furrow (S1) and surface drip irrigation (S2), were laid in the sub plot. The results showedthat in comparison with furrow irrigation, drip irrigation increased yield, water use efficiency(WUE), number of bolls per plant, and bolls weight by 8%, 44%, 15% and 33%, respectively.Also, compared with 100 percent of crop water requirement, the 80% treatment reduced waterusage by 1900 m3 ha-1, while yield, number of bolls per plant, and bolls weight decreased by1.6%, 9% and 3.6%, respectively, but WUE increased by 18%. Economic efficiency showedthat 80 percent of water requirement in the drip irrigation system was the best treatment.Considering the results obtained in this study and in the light of water saving and higherWUE, as the main objectives in deficit irrigation, for cotton cultivation in Orzoueyeh,application of 80% crop water requirement in the drip irrigation system is preferred.
Shahram Karimi; Rasoul Asadi; Mohammadeza Mohammadrezakhani
Abstract
In order to investigate the effect of deficit irrigation and position patterns tube to increase water use efficiency of cotton, a field experiment was carried out during 2009 and 2010 growing season at experimental farm of Orzoueyeh Agriculture and Natural Resources Research Center in Kerman province. ...
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In order to investigate the effect of deficit irrigation and position patterns tube to increase water use efficiency of cotton, a field experiment was carried out during 2009 and 2010 growing season at experimental farm of Orzoueyeh Agriculture and Natural Resources Research Center in Kerman province. The treatments were laid out in strip split plot a Randomized Complete Block Design with three replications. The treatments were comprised of three levels of irrigation including 100, 80, 60 percent of crop water requirement in main plot and sub plot consisted of two irrigation systems (surface drip irrigation system (S1), subsurface drip irrigation system (S2)) and two tape position patterns (conventional (L1) and alternative (L2)). The results showed that In comparison with 100 percent of crop water requirement, 80 percent of water requirement caused parsimony of water usage equal 1300 m3 ha-1, and yield, WUE, number of bolls per plant and bolls weight increased 8.5%, 4%, 10% and 2.5% respectively. Also I3 compared with I1 savin about 3400 m3 ha-1 of irrigation water, and increase WUE was 8% but yield loss, number of bolls per plant and bolls weight decreased 18%, 25% and 18% respectively. Considering the results obtained in this study in the light of water saving as the main object in deficit irrigation and water use efficiency (WUE) for cotton cultivation in Orzoueyeh, the 80% of crop water requirement on subsurface drip irrigation is preferred.