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我省有许多农田重施氮肥,轻施磷肥,以致使氮肥、磷肥的施用比例严重失调,农田缺磷问题日益突出。1979年全省每亩耕地平均施用氮肥为50斤左右,磷肥8斤左右。氮、磷比例为1∶0.18。据各地土壤普查和养分速测结果,全省大部分地区土壤缺磷,有的有效磷含量只有3 ppM 左右,不能满足作物生长发育的需要。因此,当前我省大面积土壤缺磷现象,已成为农业增产的一大障碍。磷肥是植物生长三要素之一。作物在生长过程中需要磷肥是很多的,土壤中有效磷的丰缺,直接关系着植物磷素营养状况,缺
There are many farmland in our province heavy nitrogen fertilizer, light phosphate fertilizer, resulting in a serious imbalance in the application of nitrogen and phosphorus fertilizer, phosphorus shortage in farmland has become increasingly prominent. In 1979, the average acreage of arable land per acre in the province was about 50 kilograms of nitrogen fertilizer and 8 kilograms of phosphorus fertilizer. Nitrogen, phosphorus ratio of 1: 0.18. According to the results of soil census and nutrient measurement in various places, most of the province’s soil is deficient in phosphorus, and some available phosphorus is only about 3 ppM, which can not meet the needs of crop growth and development. Therefore, the current phenomenon of phosphorus deficiency in large areas of our province has become a major obstacle to agricultural production. Phosphate fertilizer is one of the three elements of plant growth. Crops need a lot of phosphorus in the growth process, the abundance of available phosphorus in the soil is directly related to plant phosphorus nutrition, lack of