摘要
为进一步优化阳城县春玉米的灌溉制度,利用阳城县1960-2019年气象资料,分析计算了春玉米各生育阶段需水量和降水量年际变化,并求出典型灌溉年份(25％、50％、75％、95％保证率)下当地春玉米的灌溉用水量.结果表明:60年来,阳城县春玉米全生育期多年平均需水量值为532.49 mm,气候倾向率以2.68 mm/(10 a)的变化减少;降水量多年平均值为411.65 mm,气候倾向率以13.11 mm/(10 a)的变化减少.4种典型灌溉年份(25％、50％、75％、90％保证率)下,需补充灌溉水量依次为80.70 mm、188.40 mm、350.43 mm、532.83 mm.
Abstract
In order to further optimize the irrigation scheduling of spring corn in Yangcheng County,the interannual variation in water demand and precipitation of spring corn at different growth stages were analyzed and calculated using meteorological data from 1960 to 2019.The irrigation water consumption for local spring corn in typical irrigation years(25％,50％,75％,95％guarantee rates)were calculated.The results show that over the past 60 years,the average annual water demand for spring corn throughout its entire growth period in Yangcheng County is 532.49 mm,and the climate tendency rate is decreasing with a trend of 2.68 mm/(10 a).The average annual precipitation is 411.65mm,and the climate tendency rate is decreasing with a trend of 13.11 mm/(10 a).The four typical irrigation years(25％,50％,75％,and 90％guarantee rate)require supplementary irrigation water,which are 80.70 mm,188.40 mm,350.43 mm,and 532.83 mm in sequence.
维普
万方数据