| 长期施肥条件下黑垆土有效磷对磷盈亏的响应 |
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| 引用本文： | 裴瑞娜,杨生茂,徐明岗,樊廷录,张会民.长期施肥条件下黑垆土有效磷对磷盈亏的响应[J].中国农业科学,2010,43(19):4008-4015. |
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| 作者姓名： | 裴瑞娜 杨生茂 徐明岗 樊廷录 张会民 |
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| 作者单位： | (甘肃农业大学资源与环境学院) |
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| 基金项目： | 国家基础性工作专项项目，国家"十一五"重点科技支撑计划项目 |
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| 摘 要： | 【目的】阐明不同施肥条件下土壤有效磷与土壤磷素累积的响应关系,为黄土高原旱作农区科学施用磷肥提供依据。【方法】分析了黑垆土28年(1979—2007年)肥料长期定位试验中,不同施肥处理下土壤磷素盈亏与土壤有效磷的变化特征。【结果】长期施用化肥(NP)、单施有机肥(M)及化肥与有机配施(NPM),土壤有效磷含量随试验年限的延长呈极显著(P0.01)上升趋势,年均分别增加0.54、0.64和1.11mg·kg-1,而不施肥和单施氮肥处理土壤有效磷含量呈持平或下降趋势。土壤有效磷增加量随磷盈亏而变化,二者呈极显著(P0.01)正相关,施用化学磷肥、单施有机肥和有机无机肥配施,土壤中的磷素均有盈余,土壤中每盈余100kg·hm-2磷所能增加的土壤有效磷分别为3.85、0.29和0.53mg·kg-1。施用化学磷肥土壤有效磷的增加速率是施有机肥的11.6倍。【结论】土壤有效磷随土壤磷素盈余而变化与加入磷素形态密切相关,长期单施化学磷肥提升土壤有效磷的速率显著大于单施有机肥。
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| 关 键 词： | 长期施肥 黑垆土 有效磷 磷盈亏 |
| 收稿时间： | 2010-03-01; |
Response of Olsen-P to P Balance in Black Loessial Soil Under Long-Term Fertilization |
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| PEI Rui-na,YANG Sheng-mao,XU Ming-gang,FAN Ting-lu,ZHANG Hui-min.Response of Olsen-P to P Balance in Black Loessial Soil Under Long-Term Fertilization[J].Scientia Agricultura Sinica,2010,43(19):4008-4015. |
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| Authors: | PEI Rui-na YANG Sheng-mao XU Ming-gang FAN Ting-lu ZHANG Hui-min |
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| Affiliation: | (College of Resources and Environmental Sciences,Gansu Agricultural University)
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| Abstract: | 【Objective】 Response of Olsen-P to P balance in a black loessial soil was studied in a long-term fertilization experiment carried out in Pingliang, Gansu province for the purpose of providing a theoretical basis for the scientific application of phosphate fertilizer in the Loess Plateau dryland farming areas. 【Method】 The relationships between Olsen-P change and the budget of soil P balance in the treatments of CK, N, NP, M, NPM were studied by the method of linear regression based on a 28-year (1979-2007) experiment. 【Result】 The results showed that long-term application of M, NP, and NPM resulted in significant increase of Olsen-P by 0.54, 0.64 and 1.11 mg?kg-1?a-1, respectively. While the soil Olsen-P content remained stable or showed a decreasing trend in the CK and N treatments. The increase amount of Olsen-P changed with P balance. Application of NP, M, NMP increased the amount of Olsen-P significantly. The P balance was very significantly (P＜0.01) correlated with the Olsen-P. With an average surplus of 100 kg phosphorus per hm2, the soil Olsen-P increased by 3.85, 0.29 and 0.53 mg?kg-1, in the NP, M, and NPM treatments, respectively. Application of chemical fertilizer increased Olsen-P was 11.6 times higher than that of manure, followed by the chemical fertilizer combined with manure. 【Conclusion】 Changes of soil Olsen-P followed soil phosphorus surplus and the close correlation between the increased amount of Olsen-P and the form applied phosphorus were observed. Long-term application of chemical P fertilizer resulted in the increase of the amount of Olsen-P is higher than manure obviously in black loessial soil. |
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| Keywords: | long-term fertilization black loessial soil Olsen-P P balance |
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