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Details van artikel 26 van 43 gevonden artikelen
| Titel: |
Nitrogen storage and variability in paddy soils of China |
| Auteur: |
J. S. Lin X. Z. Shi D. S. Yu D. C. Weindorf H. J. Wang Y. C. Zhao W. X. Sun Q. H. Liu |
| Verschenen in: |
Biogeosciences discussions |
| Paginering: | Jaargang 7 (2010) nr. 1 pagina's 855-877 |
| Jaar: |
2010 |
| Inhoud: |
Paddy soils support important croplands in many parts of the world, especially in Asia. A thorough understanding of nitrogen (N) in Chinese paddy soils would be helpful to comprehend N cycling on farms from a national perspective. The N storage and density of paddy soils in China were evaluated employing 1490 soil profiles and a map of Chinese soils at a scale of 1:1 000 000. Results showed that the mean N density of paddy soils at 0–100 cm was 1240.0 g/m<sup>3, with N storage of 569.0 Tg. Paddy soil N density varies with different soil-water regime. In fact, waterlogged conditions can enhance paddy soil N content. Different rotation systems and various fallow systems also can affect paddy soil N density. There are significant relationships of N between both SOC and sand content. But the sensitivity of paddy soil N to climate was weak because of human activity. While this GIS-based analysis is a relatively coarse evaluation of the database, it does provide the first quantitative assessment of paddy soils N storage across China using commonly available digital databases. |
| Uitgever: |
Copernicus GmbH (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 26 van 43 gevonden artikelen
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