我国对于土壤肥力的研究有着悠久的历史,远在公元前约2200年写成的“禹贡”,约1120年写成的“周礼”和约767年写成的“管子”中,都有这方面的记载。值得提明的是我国农民在长期生产斗争中总结出:抗逆性强、宜种、宜肥、宜耕范围广的是肥土,反之是瘦土。他们强调了土壤本身的体质,而不单 Our study on soil fertility has a long history, as recorded in “Yugong” written about 2200 BC, “Zhou Li” written in about 1120 and “Guan Zi” written in about 767, all of which are recorded . It is worth mentioning that the peasants in our country summed up in the long-term production struggle: strong resistance, should be planted, should be fat, a wide range of cultivated land is fertile soil, on the contrary is the lean soil. They emphasize the constitution of the soil itself, not just