甘肃北部棉花灌溉保证率分析  

Irrigation Probability Analysis of Cotton in Northern Gansu Province

作　　者：李松敏[1] 韩娜娜[1] 周青云[1] 王仰仁[1] 

机构地区：[1]天津农学院水利工程学院,天津300384

出　　处：《节水灌溉》2016年第9期148-150,共3页Water Saving Irrigation

摘　　要：甘肃地区水资源短缺,合理利用农业水资源对地区发展非常重要。根据甘肃瓜州1983-2012年30年的气象资料,计算出瓜州地区棉花作物的参考作物蒸发蒸腾量以及作物的实际蒸发蒸腾量,进而计算甘肃瓜州棉花作物多年灌溉需水量。通过调节灌水次数来调节灌溉供水量,以得出不同供水条件下的灌溉设计保证率,根据不同灌水次数对作物经济效益的影响,得到最大效益时的灌水量和灌溉设计保证率。分析结果表明,灌溉设计保证率在53%时经济效益最高,从而确定甘肃瓜州地区的最优灌水量为440mm,达到既保证效益又能做到节水灌溉的目的。Gansu Province is one of the provinces of water shortage, it is very important to use agricultural water resources reasona- bly for the region development. Based on meteorological data of 30 years from 1983 to 2012 of Guazhou in Gansu province, reference crop evapotranspiration and actual crop evapotranspiration of cotton were calculated. And then irrigation water demand of cotton crop was calculated. In order to draw the irrigation guarantee rate under different water supply conditions, the frequency of irrigation was adjusted to regulate the amount of irrigation water, according to the effect of irrigation frequency on the crops of economic benefits, the maximum benefit of irrigation amount and irrigation guarantee rate. Analysis results showed that economic benefit is the highest when the designed irrigation guarantee rate is 53%, thus, the optimum irrigation quantity is 440 mm in Guazhou area, and it can en- sure the efficiency and achieve the purpose of water saving irrigation.

关 键 词：甘肃北部 参考作物蒸发蒸腾量 经济效益 灌溉设计保证率 

分 类 号：S274.4[农业科学—农业水土工程]