| Phosphorus accumulation and inorganic phosphorus fractions in greenhouse soils |
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| DOI：10.7606/j.issn.1000-7601.2008.01.04 |
| Key Words: greenhouse soil phosphorus accumulation bio－availability inorganic phosphorus fractions |
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| Abstract: |
| According to Jiang－Gu inorganic phosphorus fractions classification systems?the characteristic of phosphorus accumulation?inorganic phosphorus fractions and bio-availability how to change with vegetable cultivation years in greenhouse soil in Luoyang suburb were studied．The difference between greenhouse and white-corn rotation land were discussed too．The results indicated that while vegetable cultivation years were increased ?the total phosphorus of soil was increased too．It was achieved4．22g／kg of total phosphorus in15～17 years greenhouse．Available phosphorus concentration were increased too and it achieved the maximum in 11 years．The most amount phosphorus were accumulated in Ca2－P、Ca8－P、Al－P、Fe－P in the first 5years and the dominat fraction were Ca2－P、Ca8－P．While vegetable cultivation years were increased?the amount of phosphorus accumulated in O－P、Ca10－P were increased．And Ca10－P was the dominant fraction．Others fractions’concentration were decreased while were increased．Vegetable cultivation years had no influence on propotion of calcium combined phosphorus and no calcium combined phosphorus． |