| Changes of inorganic phosphorus in the soils covered with Robinia Pseudoacacia with different growing period of in the loess hilly area |
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| DOI：10.7606/j.issn.1000-7601.2008.03.35 |
| Key Words: growing period ino rganic phosphorous Robinia pseudoacacia |
| Author Name | Affiliation | | SU Shaohua | College of Resources and Environmental Northwest A ＆ F University,Yangling, Shaanxi 712100, China | | LIU Heman | College of Resources and Environmental Northwest A ＆ F University,Yangling, Shaanxi 712100, China | | DONG Lina | College of Resources and Environmental Northwest A ＆ F University,Yangling, Shaanxi 712100, China | | ZHANG Jinai | Shuozhou Vocational and Technical College,Shuozhou, Shanxi 036002, China | | ZHANG Xingchang | College of Resources and Environmental Northwest A ＆ F University,Yangling, Shaanxi 712100, China；Institute of Soil and W ater Conserv ation Chinese Academy of Sciences and Ministry of W ater Resources,Yangling, Shaanxi 712100, China |
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| Abstract: |
| The time-space substitute method was used to discuss the changes of inorganic phosphorous in the woodlands covered with Robinia pseudoacacia of 2 16 24 27 30 and 43 years of growing period respectively on the basis of field investigation and laboratory analysis．The results indicate that with the extension of growing period both the contents of total amount of tota-l phosphorous and inorganic phosphorous in the woodland covered with Robinia pseudoacacia decreased and the content of Ca10—P showed significant decrease on the contrary other inorganic phosphorus fraction increased；while in the soils that covered with Robinia pseudoacacia of different growing period the content and proportion of inorganic phosphorous fraction maintained following order as：Ca10—P＞Ca8—P＞Fe—P＞Al—P＞Ca2—P． |
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