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[NO3(-)-N leaching and distribution in soil profile in dry highland of Loess Plateau under long-term fertilization].
- 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.
- Subjects :
- Fertilizers
Nitrates analysis
Nitrogen analysis
Soil analysis
Subjects
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