长期定位施肥对土壤磷素吸持特性与淋失突变点影响的研究

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	长期定位施肥对土壤磷素吸持特性与淋失突变点影响的研究
	戚瑞生 ; 党廷辉 ; 杨绍琼 ; 马瑞萍
刊名	土壤通报
	2012
卷号	43 期号:05 页码:1187-1194
关键词	长期施肥 Long-term fertilization 磷素吸持特性 Phosphorus adsorption characteristics 磷吸持饱和度 Degree of P sorption saturation 突变点
其他题名	The Impact on Soil Phosphorus Adsorption Characteristics and
中文摘要	通过对黄土旱塬地区长期(26a)定位施肥条件下的不同施肥处理的土壤磷素及其吸持参数的测定,以及通过室内模拟试验对土壤磷素淋失突变点的测定,研究了土壤磷素吸持参数、土壤磷素淋失突变点和部分土壤性质之间的关系。结果表明,经过26年的长期施肥,M75P60和M75N120P60处理的Olsen-P含量比CK处理的提高了10.7和9.8倍,全磷(T-P)含量比CK处理的提高了60.4%和57.7%。长期磷肥和有机肥投入可以减低土壤磷素的最大吸附量(Qm),而提高土壤磷素的吸附饱和度(DPSS),M75N120P60处理的Qm比CK的减低了49.92%,而DPSS比CK的提高了21.5倍。相关分析表明,黄土旱塬土壤的Qm与Olsen-P、T-P和CaCl2-P呈极显著的负相关关系(P<0.01),与土壤有机质呈显著负相关关系(P<0.05)。零净吸附浓度磷(EPC0)与Olsen-P和CaCl2-P呈极显著正相关关系,与T-P和SOM也达到显著正相关,而与pH值的关系不显著,但土壤磷最大缓冲能力(MBC)与pH值的关系达到极显著。DPSS与Olsen-P、T-P、CaCl2-P和SO
英文摘要	Soil P and its sorption parameter of different fertilization treatments under 26-year long-term fertilizing field experiment on loess arid plateau were determined. Meanwhile, soil P leaching change-point was measured by lab cultivating experiment. Relations between part of soil properties and soil P adsorption parameter or P leaching change-point were studied, as well as the relationship between soil P adsorption parameters and P leaching change-point. The results showed: after 26 years of long-term fertilization, contents of Olsen-P of M75P60 and M75N120P60 respectively increased 10.7 and 9.8 times than CK treatment and content of T-P respectively increased 60.4% and 57.7% than CK treatment. Long-term application of phosphorus fertilizer and organic fertilizer reduced the maximum P adsorption capacity (Qm) of the soil, but increased the degree of P sorption saturation (DPSS) of the soil, the Qm of M75N120P60 reduced 49.92% than CK treatment, but DPSS of M75N120P60 increased 21.5 times than CK treatment. There was highly significant negative correlations between Qm and Olsen-P, T-P or CaCl2-P(P<0.01) and significant negative correlation between Qm and SOM (P<0.05). There was highly significant positive correlations between EPC0 and Olsen-P or CaCl2-P and significant positive correlations between EPC0 and T-P or SOM, while the relationship with pH value was not significant, but MBC was highly related to pH value. DPSS was highly related to Olsen-P, T-P, CaCl2-P and SOM. The leaching change-point of soil Olsen-P had very significant positive correlation with Qm, and had significant positive correlation with MBC, while the relationships between it and DPSS、Olsen-P、Total-P or Ca Cl2-P was very significant. Results also indicated the value of soil Olsen-P leaching change-point of loess soil arid land coincided with DPSS15% value, namely, the value of DPSS15% can be taken as soil Olsen-P leaching change-point of the present study area.
语种	中文
公开日期	2014-06-30
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/5358]
专题	水土保持研究所_水保所知识产出(1956-2013)
推荐引用方式 GB/T 7714	戚瑞生,党廷辉,杨绍琼,等. 长期定位施肥对土壤磷素吸持特性与淋失突变点影响的研究[J]. 土壤通报,2012,43(05):1187-1194.
APA	戚瑞生,党廷辉,杨绍琼,&马瑞萍.(2012).长期定位施肥对土壤磷素吸持特性与淋失突变点影响的研究.土壤通报,43(05),1187-1194.
MLA	戚瑞生,et al."长期定位施肥对土壤磷素吸持特性与淋失突变点影响的研究".土壤通报 43.05(2012):1187-1194.