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陕西省宜君县地处渭北旱塬与陕北黄土高原交界处,境内山、川、塬、峁、沟相接,平均海拔1 178m,年平均降水量709.3 mm,且主要集中在7~9月份。该县总面积1 500 km~2,总耕地面积45万亩,2015年春玉米种植面积约30万亩,其中地膜玉米10万亩。春玉米是该县主要粮食作物,宜君玉米被农业部授予“中国地理标志认证”产品。近年来在玉米施肥中存在一些弊端,造成土壤有效磷含量低、利
Yijun County, Shaanxi Province is located in the Weibei arid plateau and the northern Shaanxi Loess Plateau junction, the territory of mountains, Sichuan, Plateau, 峁, ditch, with an average elevation of 1 178m, the average annual rainfall of 709.3 mm, and mainly concentrated in the 7 ~ September. The total area of 1 500 km ~ 2, the total area of 450,000 mu of cultivated land, spring 2015 corn planting area of about 300,000 mu, of which 100,000 mu of plastic film corn. Spring corn is the county’s main food crops, Yijun corn was awarded the Ministry of Agriculture “China Geographical Indication certification ” products. In recent years, there are some drawbacks in corn fertilization, resulting in low available phosphorus content and benefit