有机肥对土壤剖面硝态氮淋失影响的模拟研究

利用三种不同长度的土柱 ,模拟研究了有机肥对土壤剖面中土壤硝态氮淋失的影响。结果表明 ,有机肥对KNO3氮肥中 NO- 3 — N的淋失有一定抑制作用 ;施加有机肥可提高土壤碱解态氮含量 ;有机肥本身亦可产生NO- 3 — N淋失。

The simulated test was conducted by means of three kinds of soil column of 60 cm, 100 cm and 150 cm length. The results were as follows: The organic manure could reduce leaching of NO - 3-N from KNO 3 addition and increase the level of soil hydrolable nitrogen. The organic manure itself could produce leaching of NO - 3-N in soil column.