鲁北地区主要作物不同生育期需水量和作物系数的试验研究

Studies on ETc and Kc of Main Crops in Northern Shandong Province

依据2006-2007年田间试验资料,利用Penman-Monteith公式计算鲁北地区主要作物(冬小麦、夏玉米、棉花、苹果和韭菜)各生育期的参考作物蒸散量,利用农田水量平衡方程及土壤水分胁迫系数计算作物不同生育期实际蒸散量,计算得到相应的作物系数。结果表明,鲁北地区目前产量状况下冬小麦、夏玉米、棉花、苹果和韭菜全生育期的需水量分别为491.2、371.0、425.8、666.8和891.8mm,作物系数分别为1.32、1.34、0.85、0.99和1.33。

According to the field experiments from 2006 to 2007, the reference crop evapotranspiration was calculated by using Penman-Monteith equation on main crops in the Northern Shandong Province. The actual crop evapotranspiration was achieved by water balance equation and adjustment coefficient of soil water. The evapotranspiration in the whole growing period of winter wheat, summer corn, spring cotton, apple trees and Chinese chive was 491.2 mm, 371.0 mm, 425.8 mm, 666.8 mm and 891.8 mm respectively, while the crop coefficient in the whole growing period was 1.32, 1.34, 0.85, 0.99 and 1.33 for winter wheat, summer corn, spring cotton, apple trees and Chinese chive respectively.