关于磷矿粉的施用技术,重点说明下列几个问题:(1)用量,(2)细度,(3)后效,(4)与有机肥的配合,(5)石灰的影响。由于我国施用磷矿粉的历史比较短,长期的试验结果还很少,因此有关这些问题,在列举我们的试验资料的同时,也引用了一些国外试验结果供大家参考。磷矿粉的用量苏联、美国、德意志联邦共和国、匈牙利等国绝大部分地区,每年只种植一季 The application of phosphate rock technology, focusing on the following questions: (1) dosage, (2) fineness, (3) after the effect, (4) and organic manure, (5) the impact of lime. Due to the relatively short history of using phosphate rock in our country and few long-term test results, we also cite some foreign test results for your reference while listing our test data. Amount of phosphate rock powder The vast majority of the Soviet Union, the United States, the Federal Republic of Germany, Hungary and other countries, only one season per year