自然降水条件下施肥对旱塬冬小麦产量水平的影响

INFLUENCE OF FERTILIZER APPLICATION ON YIELDING LEVEL OF WINTER WHEAT UNDER NATURAL RAINFALL

在黄陵南塬，研究了在自然降水条件下，采用以增施肥料为主的旱作技术对冬小麦产量的影响，主要结论如下：（１）实产与降水量呈正相关，且施肥量越高，产量越高；（２）麦田土壤水分利用率和水分生产效率都随着施肥量的增加而增加；（３）施肥量的大小影响着冬小麦植物学性状；（４）五年试验示范表明，以处理３标准配施肥料（厩肥３００００ｋｇ／ｈｍ２，纯氮２２６．２ｋｇ／ｈｍ２和Ｐ２Ｏ５１７２．５ｋｇ／ｈｍ２），最经济，最可行。

In Huang Ling southern plateau,studied on the influence of fertilizer application on yield level of winter wheat under natural rainfall.The major resurts are as follows:1.There was a higher positive correlation between the actural yield and the rainfall,and the actural yield raised as fertilizer was increased.2.The utilized coefficient of water and the water productive efficiency increased as the standard of fertilizer application was raised.3.The quality of botany of winter wheat was influenced by increased fertilizer.4.It was the most economize and best that the standard of rationing application of fertilize of treatment 3 (Organic fertilizer 30000 kg/hm2,N 226.2 kg/hm2, P2O5172.5 kg/hm2 )under natural rainfall.