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Irrigation Quota and Its Changes of Different Irrigation Modes in Arid Xinjiang Region
Author(s): 
Pages: 5-11
Year: Issue:  12
Journal: Water Saving Irrigation

Keyword:  agriculture in arid areasirrigation modeirrigation quota;
Abstract: 采用1998年新修正彭曼—蒙特斯(P-M)方法计算作物蒸散量ET0,以不同作物系数Kc分析作物需水量ETc,基于普通克里格法、灌溉试验、灌区调查与典型灌水试验综合技术进行区域插值和比较分析农业灌溉定额,研究表明,新疆常规沟畦灌、膜上灌、喷灌、微灌4种灌溉模式,正常年份(P=50%)灌溉定额分别为5 100、4 350、3 820和3 600m3/hm2;干旱年份(P=75%)灌溉定额分别为5 625、4 800、4 200和3 975m3/hm2.4种灌溉模式按面积加权综合灌溉定额(P=50%)为4 515 m3/hm2;P=75%为4980 m3/hm2.应用柯布—道格拉斯函数研究综合灌溉定额变化,结果表明,高效节水灌溉发展对综合灌溉定额下降贡献效应明显,常规灌溉是综合灌溉定额增加的主因.研究成果为干旱新疆农业水资源总量控制定额管理提供了技术依据.
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