在毛主席革命路线指引下,上海郊区批林批孔运动不断深入,农业学大寨群众运动深入开展,革命、生产形势一片大好,农业生产连年获得丰收。近年来,由于复种指数的不断提高,三熟制面积的扩大,对产量的提高起着决定性的作用,但同时耕作、轮作、施肥等方面发生了一些变化,由此产生了土壤肥力一些新矛盾。生产实践证明,土是农业生产的基础,土壤肥力的情况直接影响产量的提高,特别是单产的上升。因此,调查研究土壤肥力现状,进一步改土培肥,对于促进当前郊区稳产、高产和全面平衡增产,具有重大的现实意义。 Under the guidance of Chairman Mao’s revolutionary line, there was a continuous deepening of the campaign of criticizing and approving holes and holes in the suburbs of Shanghai. The mass movement of learning agriculture in Dazhai went deep into the field. The revolution and the production situation were excellent and the agricultural production had a good harvest year after year. In recent years, due to the continuous improvement of the multiple cropping index, the expansion of the three-cropping system has played a decisive role in the improvement of the yield. However, some changes have taken place in the aspects of tillage, crop rotation and fertilization, resulting in some new contradictions in soil fertility . Production practice has proved that soil is the basis of agricultural production, soil fertility conditions directly affect the increase of yield, especially the rise of yield. Therefore, investigating and studying the present status of soil fertility and further improving soil and fertilizing have great practical significance for promoting steady and high-yielding and comprehensive and balanced production increase in the current suburbs.