| Cite this article: | 秦永林,田艳花,陈杨,等.磷肥品种与土壤磷素活化系数对栗钙土磷素淋溶的影响[J].灌溉排水学报,0,():-. |
| QIN Yonglin,TIAN Yanhua,CHEN Yang,et al.磷肥品种与土壤磷素活化系数对栗钙土磷素淋溶的影响[J].灌溉排水学报,0,():-. |
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| Effect of Phosphorous Leaching with Different Phosphorus Fertilizers and Phosphorus Activation Coefficient in Chestnut Soil |
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QIN Yonglin1, TIAN Yanhua1, CHEN Yang2, JIA Liguo1, YU Jing1, FAN Mingshou1
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1.College of Agronomy,Inner Mongolia Agricultural University;2.College of Grassland and Resource Environment,Inner Mongolia Agricultural University
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| Abstract: |
| 【Objective】Explore the characteristics of phosphorous leaching with different phosphorous fertilizers and phosphorus activation coefficient in chestnut soil.【Method】With soil column simulation experiment, the effects of total phosphorus (TP) and total dissolved phosphorus (TDP) and leaching amount in leachates from the soil of 2 the phosphorus activation coefficient (PAC) were studied by applying three types of phosphate fertilizers including monocalcium phosphate(MCP, 160 kg P2O5?hm-2), monoammonium phosphate(MAP, 160 kg P2O5?hm-2) and diammonium phosphate (DAP, 160 kg P2O5?hm-2).【Result】(1)Soil layer of more than 40cm had phosphorous leaching loss in chestnut soil. The initial TP of 7.72% PAC was 1.91 times higher than 0.86% PAC. (2) In chestnut soil, TDP which is the main existing forms of TP in phosphorous leaching accounted for 68.8%～82.9% of TP. (3)Compared with the soil of lower PAC, phosphorous leaching loss were significantly increased by applying phosphate fertilizer in the soil of higher PAC. (4)Compared with the MCP and MAP, DAP significantly increased phosphorous leaching loss, which were less than 2% phosphate fertilizer.【Conclusion】Compared with the MCP and MAP, phosphorous leaching loss of DAP is the highest in chestnut soil. The soil of higher PAC has high risk of phosphorous leaching by applying phosphate fertilizers. |
| Key words: Phosphate Fertilizer, Leaching Loss, Chestnut Soil, Phosphorus Activation Coefficient |
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