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一、试验目的栽培棉花需肥较多,旱地缺肥情况又比灌区严重,如能种植绿肥,就可以解决很大的肥源问题,但绿肥作物需水量较多,翻庄以后又必须在水分条件较好的情况下始能分解,栽培绿肥是否对棉田水分有所影响,这是一个首要的问题,因而作此试验以探索旱地栽培绿肥的可能性,给轮作制度的改革提供依据。二、试验经过及处理本试验于1956——57年在陕西关中扶风农场进行,试验地前槎为三年连作小麦,1956年
First, the purpose of the experiment Cultivation of cotton need more fertilizer, lack of fertilizer and dry conditions than the irrigation area serious, if we can grow green manure, you can solve a lot of fertilizer problems, but green manure requires more water, turning Zhuang later must be in the water Under the better conditions, it can decompose and culture green manure affects the moisture of cotton field. This is a major issue. Therefore, this experiment is to explore the possibility of green manure cultivation in dry land and provide the basis for the reform of the rotation system. Second, the test after and treatment of the experiment in 1956 - 57 years in Shaanxi Guanzhong Fufeng farm, the test ground for three years even for the wheat, 1956