Dissolution characteristics of phosphate rocks in flooded paddy soils with different P status
Dissolution and availability characteristics of two phosphate rocks namely Kaiyang phosphate rock (GPR) and Wucun phosphate rock (WPR) were investigated by incubation in three flooded acid paddy soils with similar properties except P status. Results show that P adsorption capacity of soil NK and CK...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Zhejiang University Press
2008-11-01
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| Series: | 浙江大学学报. 农业与生命科学版 |
| Subjects: | |
| Online Access: | https://www.academax.com/doi/10.3785/j.issn.1008-9209.2008.06.011 |
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| Summary: | Dissolution and availability characteristics of two phosphate rocks namely Kaiyang phosphate rock (GPR) and Wucun phosphate rock (WPR) were investigated by incubation in three flooded acid paddy soils with similar properties except P status. Results show that P adsorption capacity of soil NK and CK with low P status was significantly greater than that of soil NPK with high P status, the average P desorption rate of soil NK and CK was significantly lower than that of soil NPK. The amounts of dissolution of phosphate rocks (PRs) in soils increased with the flooding time extended. More PRs dissolved in soil NK and CK than in soil NPK. More P of WPR dissolved in three soils than that of GPR. Soil available P increased following addition of PRs. Soil ΔResin-P increased with the flooding time extended after WPR applied, and decreased with the flooding time extended after GPR applied. Compared with GPR, WPR can be more effective in increasing soil available P. |
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| ISSN: | 1008-9209 2097-5155 |