苏北地区不同水文年冬小麦需水量与灌水量分析

Crop Water Requirement and Irrigation Water Demand for Winter Wheat under Different Hydrologic Years in North of Jiangsu Province

【目的】明确苏北地区冬小麦灌水量。【方法】基于苏北地区6个标准气象站点1996—2015年气象数据,计算分析了冬小麦不同水文年生长季内和不同生育阶段作物需水量和灌溉需水量变化特征。【结果】苏北地区多年平均降雨量为315 mm;冬小麦生育期前期、快速发育期、生育中期和生育期后期的作物需水量分别为40、100、200和75 mm。【结论】苏北地区干旱年冬小麦快速发育期、生育中期和生育期后期的灌溉需水量分别为70、135和15 mm,平水年快速发育期和生育中期的灌溉需水量分别为70 mm和81 mm,丰水年生育中期和生育期后期的灌溉需水量分别为85 mm和20 mm。

【Objective】Determine the irrigation amount of winter wheat in northern Jiangsu.【Method】Based on the observation data of six standard weather stations from 1996 to 2015 in the north of Jiangsu province,the crop water requirement and irrigation water demand during different crop growth stages under different hydrologic years were calculated.【Result】The results showed that annual average rainfall was 315 mm.The crop water requirement of winter wheat were 40 mm,100 mm,200 mm and 75 mm during early growth period,rapid development period,middle and late growth period.【Conclusion】Furthermore,the irrigation water demand of winter wheat were 70,135 mm and 15 mm during rapid development period,middle and late growth period for dry years.For the normal years,the irrigation water demands were 70 mm and 81 mm during rapid development period and middle growth period.For the wet years,the irrigation water demands were 85 mm and 20 mm during middle and late growth period.