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前言无机肥料在决定固氮程度方面的作用与水稻生产相关性已经明确。增加氮肥比例对固氮有不利影响也已被清楚地证明。由于含S无机肥和杀虫剂用量的增加,大
Preface The role of inorganic fertilizers in determining the degree of nitrogen fixation and the relevance of rice production has been clear. It has also been clearly demonstrated that increasing the proportion of nitrogen fertilizers has an adverse effect on nitrogen fixation. Due to the increase in the amount of S-containing inorganic fertilizers and pesticides, large