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[NO3(-)-N leaching and distribution in soil profile in dry highland of Loess Plateau under long-term fertilization].

Authors :
Dang T
Guo S
Fan J
Hao M
Source :
Ying yong sheng tai xue bao = The journal of applied ecology [Ying Yong Sheng Tai Xue Bao] 2003 Aug; Vol. 14 (8), pp. 1265-8.
Publication Year :
2003

Abstract

The NO3(-)-N accumulation and distribution in soil profile of Loess Plateau dry highland were studied by long-term field trials. The results showed that NO3(-)-N was accumulated in the soil profile under N-fertilization. Application of P-fertilizer or organic manure reduced the NO3(-)-N content and its leaching depth in the soil profile. The deepest depth of NO3(-)-N accumulation was 120-200 cm under N treatment, and the peak of the accumulation was the highest in NPM treatment, with the depth of 60-120 cm. The NO3(-)-N accumulation depth was 80-140 cm for NP. Without nitrogen application, there was no evident accumulation of NO3(-)-N in soil profile. The more nitrogen used, the more NO3(-)-N accumulated in soil profile. Under the same nitrogen application rate, NO3(-)-N accumulation might decrease with increasing P application.

Details

Language :
Chinese
ISSN :
1001-9332
Volume :
14
Issue :
8
Database :
MEDLINE
Journal :
Ying yong sheng tai xue bao = The journal of applied ecology
Publication Type :
Academic Journal
Accession number :
14655355