| Study on dynamics variation of phosphorus enrichment in greenhouse agricultural soil |
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| DOI：10.7606/j.issn.1000-7601.2011.01.23 |
| Key Words: greenhouse agricultural soil phosphorus enrichment dynamics variation |
| Author Name | Affiliation | | WEI Yukui | College of Forestry, Northwest A & F University, Yangling, Shaanxi 712100, China | | LI Xinping | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | LIU Ruifeng | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | ZHANG Yalin | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | HUANG Yuxia | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | MAO Wenjuan | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| In order to find out the dynamics law of agricultural greenhouse soil’s phosphorus enrichment, study was made on dynamics variation of phosphorus content in agricultural greenhouse soil at different cultivation ages from 0～40 cm in Northern Shaanxi. The results showed that there was a significant difference in the content of total phosphorus, available phosphorus, inorganic phosphorus and organic phosphorus in agricultural greenhouse soil between different cultivation ages and different soil layers under the greenhouse agricultural circumstances. In greenhouse agriculture, a large amount of long-term application of phosphate fertilizer not only made the phosphorus in the topsoil from 0～20 cm enrich significantly, but also made the soil phosphorus increase at different degrees in the soil layer from 20～40 cm. With the prolongation of cultivation ages in greenhouse agriculture, total phosphorus, available phosphorus and organic phosphorus increased in different amount and extent year by year, but decreased with the increment of the soil depth. Among all types of phosphorus, Ca2-P, Ca8-P, AL-P, Fe-P, O-P and Ca10-P occupied 9.74%, 22.18%, 6.54%, 5.86%, 18.02% and 37.66% of the total amount of inorganic phosphorus, respectively. Moreover, with the prolongation of cultivation ages, the content of Ca2-P, Ca8-P, AL-P, Fe-P, O-P and Ca10-P enriched at different degrees, and accumulated in the form of calcium phosphate(including Ca8-P, Ca10-P and Ca2-P) at different layers of soil. In conclusion, we find the dynamics law of agricultural greenhouse soil’s phosphorus enrichment and its relationship with the planting ages, which provides an important basis for the effective utilization of the accumulative phosphorus in agricultural greenhouse soil and reasonable application of phosphate fertilizer. |
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