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| DOI：10.13522/j.cnki.ggps.2019461 |
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| Study of Phosphorus Mineralization Characteristics in a Mine Reclaimed Soil under Different Organic Fertilizers |
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LYU Jianyu1,2, GAO Wenjun3, HAO Xianjun1, 2*, ZHANG Ruoyang1, 2, ZHANG Bokai1, 2 , XUE Yuchen1, 2
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1. College of Resources and Environment, Shanxi Agricultural University, Taigu 030801, China; 2. National Experimental Teaching Demonstration Center for Agricultural Resources and Environment, Shanxi Agricultural University, Taigu 030801, China; 3.College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, China
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| Abstract: |
| 【Objective】The objective of this research is to explore the phosphorus mineralization characteristics on reclaimed soil by different organic fertilizers in coal mining subsidence areas.【Method】The laboratory incubation experiment was conducted to study the dynamic changes of soil available phosphorus after applying three kinds of organic fertilizers (chicken manure, pig manure, cattle manure), including no fertilizer treatment as CK and chemical fertilizer treatment as control, while combined the phosphatase activity and phosphorus inversion intensity in phosphorus mineralization process, thereby clarify the effects of different organic fertilizers on phosphorus bioavailability.【Result】①In whole indoor constant temperature incubated process, the content of available phosphorus in each fertilizer treatment presented decreasing trend with incubated time, but the content of available phosphorus in different incubated period varied with different treatments, with a sequence of chicken manure > pig manure ≥ cattle manure > chemical fertilizer > CK. At the end of incubation (105 d), chicken manure treatment, pig manure treatment and cattle manure treatment significantly increased the content of soil available phosphorus (18.56%～37.09%), compared with chemical fertilizer treatment. Compared with pig manure treatment and cattle manure treatment, the content of available phosphorus of chicken manure treatment significantly increased by 11.93%～15.62%, but there was no significant difference between pig manure treatment and cattle manure treatment.②In whole incubated process, the equations of pseudo-second order could better describe the kinetics of the available phosphorus release process in each fertilizer treatment, followed by Elovich equation and power function equation, whereas the parabolic equation had a poor fitting effect. ③In whole incubation, the phosphatase activity of organic fertilizer treatments was significantly higher than that of chemical fertilizer treatment, which increased by 39.14%～120.70%. ④During the earlier stage of incubation (0～14 d), pig manure treatment and chemical fertilizer treatment had lager effects on soil organic phosphorus inversion intensity, but there was no significant difference between pig manure treatment and chemical fertilizer treatment. Compared with chicken manure treatment and cattle manure treatment, soil organic phosphorus inversion intensity of pig manure treatment significantly increased by 41.51% and 86.52% respectively. In the middle and late period of incubation (42～105 d), there was no significant difference among different fertilizer treatments.【Conclusion】The application of organic fertilizers could accelerate the phosphorus mineralization in the reclaimed soil. Among three kinds of organic fertilizer, chicken manure had a better effect on improving the content of soil available phosphorus than that of pig manure and cattle manure. |
| Key words: organic fertilizers; phosphorus mineralization; mine reclaimed soil |
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