| Inorganic phosphorus fractionation and availablility on different kinds of planting conditions of soil in Northern Shaanxi |
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| DOI：10.7606/j.issn.1000-7601.2011.04.24 |
| Key Words: Loess Plateau inorganic phosphorus fractionation Panicum miliaceum L. Solanum tuberosum L. |
| Author Name | Affiliation | | ZHANG Qian | Gansu Vocatonal College of Agricultural Technology, Lanzhou, Gansu 730020, China | | ZHANG Suxia | College of Resources & Environment, Northwest A & F University, Yangling, Shannxi 712100, China | | LIU Ke | College of Resources & Environment, Northwest A & F University, Yangling, Shannxi 712100, China | | LV Jialong | College of Resources & Environment, Northwest A & F University, Yangling, Shannxi 712100, China |
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| Abstract: |
| By using the Jiang-Gu inorganic phosphorus fractionation method, a study was conducted on the forms and compositions of inorganic phosphorus in 0～100 cm layers of calcareous soil profile on sloping land of two kinds of farmland soil on the Loess Plateau. The results showed that inorganic P was 90.95% of total P. Ca-P
was in a dominate position in inorganic P, its proportion was 87.86%～92.55%. The contents of inorganic P, Ca2-P, Ca8-P, Al-P and Fe-P in soils of Panicum miliaceum L were higher than that in soils of Solanum tuberosum L. The content
s of O-P and Ca10-P were opposite results. The order of contents of inorganic P were Ca10-P＞O-P＞Ca8-P＞Fe-P＞Al-P＞Ca2-P. It was showed by correlation analysis and path analysis that Ca2-P was the main resource of rapid available phosphorus in the soils. |
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