一、目的和意义京郊农村由传统农业向现代化农业的迅速转化和乡镇企业的兴起,要求提供越来越乡的粮食和劳力,以手工为主旧的耕作栽培技术已不再适应。京郊中低产区占粮田面积比重大,存在主要问题是土地瘠薄,劳力紧张,耕作粗放,经济基础差,常年生产的十多亿公斤麦秸,多数白白烧掉,要求高产与地力下降的矛盾日益突出。因此,研究和推广一套以麦秸还田、底施化肥和化学除草为主要内容,以机械化作业为主要手段的夏玉 I. Purpose and Significance The rapid transformation of rural areas from traditional agriculture to modern agriculture and the rise of township and village enterprises in the suburbs of Beijing require the provision of more and more food and labor. The old farming and cultivation techniques based on handcraft are no longer suitable. The middle and low yielding suburbs of Beijing occupy a large area of ​​grain. The main problems are the infertile land, labor shortage, extensive farming and poor economic base. More than 1 billion kilograms of wheat straw are produced year after year, most of which are burned in vain and require high yield and reduced soil fertility Contradictions have become increasingly prominent. Therefore, the research and promotion of a set of straw to the field, the bottom of chemical fertilizers and chemical weeding as the main content, mechanized operations as the main means of summer jade