陇东旱塬降雨径流集蓄与补灌农田效应研究罗俊杰乔小林唐小明王勇（甘肃省农科院旱农所兰州７３００７０）１问题的提出陇东塬区降雨年平均５００～５５０ｍｍ，主要集中在７～９月，约占全年降雨总量的６０％以上，此间雨热同期，理论上是全年最佳作物生长期。但本区主要... Rainfall runoff accumulation and farmland effect in dryland of east Gansu Province of China Luo Junjie, QIAO Xiaolin, TANG Xiaoming, WANG Yong (Institute of Soil and Water Conservation, Gansu Academy of Agricultural Sciences, Lanzhou 730070) 1 The problem is raised The annual rainfall in the eastern Gansu Province is 500 ~ 550mm, Concentrated in July to September, accounting for more than 60% of the total rainfall throughout the year, rain and heat here during the same period, in theory, is the best crop growth period. But this area mainly ...