我国化学肥料的总产量和总施用量,都占世界的首位。化肥占农业物质的总投入的50％左右。另外,化肥在各项农业技术当中经济效益也最显著。据统计,我国粮食产量约有35％～40％是肥料的贡献,因此科学施肥的问题已成为农业生产的一个重要课题。 科学施肥就是要根据土壤、气候以及作物生长发育的情况来进行施肥。俗话讲,作物施肥要三看:看天、看地、看庄稼,这三看就把科学施肥的含义都包括在里头了。我想 China’s total output of chemical fertilizers and the total amount of application, both in the world’s first place. Fertilizers account for about 50% of the total investment in agricultural materials. In addition, chemical fertilizers among the various agricultural technologies are also the most significant economic benefits. According to statistics, about 35-40% of the grain output in our country is the contribution of fertilizers, so the problem of scientific fertilization has become an important issue in agricultural production. Scientific fertilization is based on the soil, climate and crop growth and development to carry out fertilization. As the saying goes, crop fertilizer to three to see: to see the sky, look at, see crops, these three see the meaning of scientific fertilization are included in the inside. I think