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近几年来,随着氮素化肥生产的发展,苏州地区每季作物亩用量达到百斤以上标准氮肥的田块和单位日益增多,普遍存在着用肥量很大,而实际增产效果和经济效益却较低的情况.针对氮素化肥在水田中如何合理施用的问题,1979年对双季早稻如何节肥、省工而又能相对稳产的氮肥施用技术作了一些探索性试验.1980年在以往试验的基础上,在苏州地区主要土壤类型上统一进行了稻、麦氮素化肥合理施用研究,现已取得双季早稻在黄泥土、青泥土、白土和沙壤土上第一季试验结果.
In recent years, with the development of nitrogen fertilizer production, the quantity of land and units with more than one kilogram of standard nitrogen fertilizer per mu in Suzhou area is increasing day by day. It is common to use a large amount of fertilizer, but the actual yield increase and economic benefits are Lower case.For the nitrogenous fertilizer in the paddy field how to rational use of the problem, double cropping rice in 1979 how to save fertilizer, labor and relatively stable production of nitrogen fertilizer to make some exploratory experiments in 1980 in the past Based on the experiments, the research on the rational application of rice and wheat-nitrogen fertilizers was carried out on the main soil types in Suzhou. The results of the first season of double-season early rice on yellow soil, green soil, white soil and sandy loam soil were obtained.