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前言 我国各地特别是西南地区蕴藏着丰富的磷肥资源,目前已利用磷矿生产出的磷肥有:磷矿粉、钙镁磷肥、过磷酸钙、偏磷酸钙等。但是这几种不同形态磷肥不同土壤上的肥效如何?以及今后应当生产那些品种(什么形态)的磷肥。这些问题在农业生产上和肥料工艺学方面都是急待解决的,但已往还未进行过系统的研究。因此有关磷肥形态与其肥效关系的研究,不论在理论上或实践上都具有极为重要的意义。 这个试验正是根据上述问题来开展工作的。试验
Preface In our country, especially the southwestern region is rich in phosphate resources, phosphate rock has been used to produce phosphate are: phosphate rock, calcium magnesium phosphate, superphosphate, calcium metaphosphate and so on. However, these different types of phosphate fertilizer on different soil fertility? And in the future should produce those varieties (what form) of phosphate fertilizer. These problems are urgent problems in agricultural production and fertilizer technology, but have not been systematically studied in the past. Therefore, the research on the relationship between the form of phosphate fertilizer and its fertilizer efficiency is of great significance both in theory and in practice. This experiment is based on the above issues to work. test