Effect of Continuous Vegetable Cultivation on Phosphorus Levels of Fluvo-Aquic Soils

WANG Xin-Min; HOU Yan-Lin

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Effect of Continuous Vegetable Cultivation on Phosphorus Levels of Fluvo-Aquic Soils

机译：连续蔬菜栽培对潮土土壤磷水平的影响

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Soil P status, inorganic P fractions, and P sorption properties were studied using sandy fluvo-aquic horticultural soils,which are high in organic matter content for vegetable production in comparison with a soil used for grain crop production in Zhengzhou, Henan Province, China. P fractions, Olsen-P, and OM were determined at different depths in the soil profile and sorption isotherm experiments were performed. Most P in excess of plant requirements accumulated in the topsoil and decreased with soil depth. Total P, inorganic P, and OM concentrations increased with continued horticultural use. Olsen-P concentrations in the 0-20 cm depth of horticultural soils were 9 to 25 times higher than those of the grain crop soil. A linear transformation of the Langmuir equation showed that the P adsorption maximum (491.3 mg P kg-i)and the maximum phosphate buffering capacity (162.1 L kg-1) for 80-100 cm were greater in the grain crop soil than the horticultural soils. Thus, the most immediate concern with excess P were in areas where heavy P fertilizer was used for vegetable crops and where soil P sorption capacities were low due to sandy soils and high organic matter content.

机译：利用沙质潮土园艺土壤研究了土壤磷状况，无机磷组分和磷的吸附特性，与中国河南郑州的粮食作物生产土壤相比，蔬菜生产中的有机物含量较高。在土壤剖面的不同深度确定P分数，Olsen-P和OM，并进行吸附等温线实验。超过植物需求量的大多数磷积累在表土中，并随土壤深度而降低。随着园艺的持续使用，总磷，无机磷和有机质的浓度增加。园艺土壤中0-20厘米深度处的Olsen-P浓度比谷物作物土壤高9至25倍。 Langmuir方程的线性变换表明，谷物作物土壤中的P吸附最大值（491.3 mg P kg-i）和最大磷酸盐缓冲能力（162.1 L kg-1）在园艺作物土壤中大于园艺土壤。。因此，对过量磷最直接的关注是在使用重磷肥料种植蔬菜的地区，以及由于沙质土壤和高有机质含量导致土壤对磷的吸附能力低的地区。

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来源
《土壤圈（英文版）》 |2004年第2期|171-176|共6页
作者
WANG Xin-Min; HOU Yan-Lin;
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作者单位

Department of Soil Environmental Science,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing,100085,China;

Department of Soil Environmental Science,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing,100085,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
fractions; horticultural soils; phosphorus status; sorption;

机译：组分;园艺土壤;磷状况;吸收;

Effect of Continuous Vegetable Cultivation on Phosphorus Levels of Fluvo-Aquic Soils

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