Phosphorus Changes and Sorption Characteristics in a Calcareous Soil Under Long-Term Fertilization

GUO Sheng-Li; DANG Ting-Hui; HAO Ming-De

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Phosphorus Changes and Sorption Characteristics in a Calcareous Soil Under Long-Term Fertilization

机译：长期施肥下石灰性土壤中磷的变化及其吸附特性

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Knowledge of phosphorus (P) behavior in long-term fertilized soils is essential for programming fertilization practices and for sustaining environmental quality.The long-term (1984-1997) effects of various fertilization treatments on P changes and sorption isotherms as well as the relationship of soil properties to P sorption and P forms were evaluated in an Ustic Isohumisol,a calcareous soil,on the Loess Plateau,China.Compared to 1984,after 13 years of crop production,total soil P in the no-P treatments (control and N treatment) decreased by 5%-7%,but in the phosphorus fertilizer alone (P),nitrogen and phosphorus fertilizers in combination (NP),manure alone (M),and nitrogen and phosphorus fertilizers and manure in combination (NPM) treatments,it increased by 22%,19%,28%,and 58%,respectively.Residual fertilizer P was found mainly in NH4Ac-soluble P (Cas-P),followed by NaHCO3-sohible P (NaHCO3-P),and NH4F-soluble P (Al-P).Phosphorus sorption in the soils with different fertilization practices fit the Langmuir equations.Phosphorus sorption capacity in the no-P treatments increased,whereas it decreased in the P-included treatments (P,NP,and NPM treatments).Phosphorus sorption maximum (Qm) was significantly and negatively correlated to inorganic P including Na4CO3-P,Cas-P,NaOH-Na2CO3-soluble P (Fe-P),and AI-P (P ≤ 0.01).Moreover,long-term fertilization increased soil organic carbon in the NP,M,and NPM treatments and decreased pH in the NP and NPM treatments.Thus,the ability of the soil to release sorbed P to the environment increased under long-term P fertilization.

机译：了解长期施肥土壤中的磷（P）行为对于编程施肥实践和维持环境质量至关重要。各种施肥措施对P变化和吸附等温线的长期影响（1984-1997）及其关系在黄土高原的石灰质土壤中，典型的Usism Isohumisol对土壤特性对P吸附和P形态的影响进行了评估。与1984年相比，在作物生产13年后，无磷处理的土壤总磷水平（对照和对照）氮肥处理减少了5％-7％，但仅磷肥（P），氮磷肥组合（NP），仅粪肥（M），氮磷肥和粪肥（NPM）处理残留肥料P主要存在于NH4Ac可溶性P（Cas-P）中，其次是NaHCO3可溶性P（NaHCO3-P）和NH4F。可溶性磷（Al-P）。不同施肥土壤对磷的吸附无磷处理的磷吸附量增加，而含磷处理（P，NP和NPM处理）的磷吸附量下降。最大磷吸附量（Qm）与无机磷显着负相关包括Na4CO3-P，Cas-P，NaOH-Na2CO3可溶性P（Fe-P）和AI-P（P≤0.01）。此外，长期施肥增加了NP，M和NPM处理中的土壤有机碳。 NP和NPM处理会降低pH值。因此，长期施用磷肥后，土壤将吸附的P释放到环境中的能力增强了。

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来源
《土壤圈（英文版）》 |2008年第2期|248-256|共9页
作者
GUO Sheng-Li; DANG Ting-Hui; HAO Ming-De;
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作者单位

Northwest Sci-Tech University of Agriculture and Forestry,Yangling,Shaanxi 712100 (China);

Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling,Shaanxi 712100 (China);

Northwest Sci-Tech University of Agriculture and Forestry,Yangling,Shaanxi 712100 (China);

Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling,Shaanxi 712100 (China);

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
calcareous soil,long-term fertilization,P accumulation,P sorption,P transformations;

机译：石灰性土壤;长期施肥;磷积累;磷吸附;磷转化;

Phosphorus Changes and Sorption Characteristics in a Calcareous Soil Under Long-Term Fertilization

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