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硝态氮肥(包括硝酸銨、硝酸銨鈣、硝酸鈣)在旱作上无論作基肥、或作追肥施用,肥效接近等氮量的硫酸銨或略为超过。但在水稻上施用,肥效不很稳定;主要是在施用技术上和其他方面还存在着問題,因而有的肥效接近等氮量硫酸銨,有的肥效較差,一般肥效相当于等氮量硫酸銨的90%左右。同时硝态氮肥容易吸湿溶解,尤其是硝酸鈣和硝酸銨鈣,南方群众目前还不大欢迎。近年来,經我国南方各地試驗,初步掌
Nitrate Nitrogen fertilizers (including ammonium nitrate, calcium ammonium nitrate, calcium nitrate) are slightly more than dry fertilizer for basal or topdressing, with fertilizer efficiency approaching that of nitrogenous ammonium sulfate. However, the application of rice, fertilizer efficiency is not very stable; mainly in the application of technology and other aspects of the problems still exist, so some fertilizer close to the nitrogen content of ammonium sulfate, and some fertilizer is poor, the general effect is equivalent to nitrogen fertilizer such as ammonium sulfate Of the 90% or so. At the same time nitrate nitrate easily absorbed moisture dissolved, especially calcium nitrate and calcium ammonium nitrate, the southern masses are not yet welcome. In recent years, the test by the southern part of our country, preliminary palm