玉米是榆林市主要粮食作物之一,常年播种面积100万亩左右,至上世纪八十年代引入地膜覆盖栽培技术以来,使玉米生产水平有了大幅度提高,单产由过去的几十公斤提高到目前的350公斤,同时播种面积也扩大到150万亩,年总产50万吨上下,已在全市粮食安全生产中占有相当重要的位置。近年来,由于全市各级党政部门确立 Corn is one of the main food crops in Yulin City. The annual perennial sown area is about 1 million mu. Since the introduction of plastic film mulching cultivation technology in the 1980s, the corn production level has been greatly increased. The yield has risen from the past tens of kilograms to the present 350 kg, while the sown area has also been expanded to 150 million mu, the total output of 500,000 tons up and down, has occupy a very important position in the city’s food safety in production. In recent years, due to the establishment of party and government departments at all levels in the city