【摘要】 中国是一个严重缺水的国家,农业用水浪费严重,发展节水农业势在必行。作物生长需水量与灌溉需水量密切相关,作物生长需水量估算方法各异,并以彭曼公式为主,该公式与参照作物需水量(ET0)和作物生长系数(Kc)有关。计划灌溉需水量是节水灌溉管理的一个重要因素,其定额方式各有利弊,仍然以农田水量平衡方程为主要评估手段。更多还原

【Abstract】 Water resource is very scare in our country and wasted seriously by agriculture irrigation, therefore we must develop water-saving agriculture. Crop water requirement is correlated with irrigation water requirements and is estimated by several different methods. The main method is Penman equation which is related to ET0 and Kc. Planning irrigation water requirement is one of the important factors for water-saving irrigation management. There are different ways of estimating irrigation water requirement and the Water Balance of Field Equation is a main estimating method.更多还原