论文部分内容阅读
渭源县位于甘肃省中部,定西市西南部.地处黄土高原与西秦岭的交汇地带,全县耕地面积79.5万亩,平均海拔2 910 m,年降水量523.5 mm,年蒸发量1 441.9 mm,年平均气温5.7℃,无霜期135天,属半干旱、半湿润气候区,适合小麦的生长。但近几年来,由于小麦种植成本增加,效益下降,加上施肥技术落后,小麦种植面积有下降的趋势。肥料效应田间试验是获得小麦最佳施肥量、施
Weiyuan County is located in the middle of Gansu Province, southwest of Dingxi City.Is located in the intersection of the Loess Plateau and the West Qinling, the county covers an area of 795,000 hectares with an average elevation of 2 910 m, an annual rainfall of 523.5 mm and an annual evaporation of 1 441.9 mm , The average annual temperature of 5.7 ℃, frost-free period of 135 days, is a semi-arid, semi-humid climate zone, suitable for the growth of wheat. However, in recent years, due to the increase of wheat planting cost, the decrease of benefit and the backward fertilization technology, the area of wheat planted downwards. Fertilizer field experiment is to obtain the best amount of wheat fertilization facilities