Effect of Nitrogen Fertilizers on Movement and Transformation of Phosphorus in an Acid Soil

DU Zhen-Yu; ZHOU Jian-Min; WANG Huo-Yan; DU Chang-Wen; CHEN Xiao-Qin

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Effect of Nitrogen Fertilizers on Movement and Transformation of Phosphorus in an Acid Soil

机译：氮肥对酸性土壤中磷的迁移转化的影响

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The effects of two different nitrogen fertilizers (urea and NH4Cl) with monocalcium phosphate (MCP) on the movement and transformation of fertilizer P in soil microsites along with soil pH changes at different distances from the fertilizer application site were studied in an incubation experiment. A highly acidic red soil (Ultisol, pH 4.57) from south China with MCP fertilizer alone or in combination with NH4Cl or urea was added to the surface of soil cylinders and packed in wax blocks. After 7 and 28 days, the extraction and analysis of each 2 mm layer from the interface of the soil and fertilizer showed that added NH4Cl or urea did not change the movement distance of fertilizer P. However, P transformation was significantly affected (P ＜ 0.05). After 7 days, at 0-8 mm distance from the fertilizer site the addition of urea significantly decreased the water-extractable P concentration; however, after 28 days the effect of N addition had disappeared. Also,at limited distances close to the fertilizer site NH4Cl application with MCP significantly increased acid-extractable P and available P, while with the addition of urea they significantly decreased. Compared with application of MCP alone,addition of urea significantly increased soil pH in fertilizer microsites, whereas the addition of NH4Cl significantly decreased soil pH.

机译：在孵化实验中，研究了两种不同的氮肥（尿素和NH4Cl）与磷酸一钙（MCP）对土壤微场所中肥料P在土壤中的移动和转化以及pH值变化的影响。将华南地区的一种强酸性红色土壤（Ultisol，pH为4.57）与MCP肥料单独使用或与NH4Cl或尿素混合使用，将其添加到土壤圆筒的表面，并装在蜡块中。 7天和28天后，从土壤和肥料界面的每2 mm层中提取和分析表明，添加NH4Cl或尿素不会改变肥料P的移动距离。但是，P的转化受到显着影响（P ＜0.05））。 7天后，在距肥料位置0-8毫米处，添加尿素显着降低了水可萃取的P浓度;然而，28天后，添加氮的作用消失了。而且，在靠近肥料位置的有限距离内，使用MCP施用NH4Cl显着增加了酸可提取的P和有效磷，而添加了尿素后，它们显着降低了。与单独施用MCP相比，添加尿素显着提高了肥料微地点的土壤pH，而添加NH4Cl显着降低了土壤pH。

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来源
《土壤圈（英文版）》 |2005年第4期|424-431|共8页
作者
DU Zhen-Yu; ZHOU Jian-Min; WANG Huo-Yan; DU Chang-Wen; CHEN Xiao-Qin;
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作者单位

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 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
中图分类土壤学;
关键词
NH4Cl, P movement, P transformation, red soil, urea;

机译：NH4Cl;磷运动;磷转化;红壤;尿素;

Effect of Nitrogen Fertilizers on Movement and Transformation of Phosphorus in an Acid Soil

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