Effect of Organic Acids and Protons on Release of Non-Exchangeable NH4+ in Flooded Paddy Soils

ZHANG Yong-Song; SHAO Xing-Hua; LIN Xian-Yong; H. W. SCHERER

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Effect of Organic Acids and Protons on Release of Non-Exchangeable NH4+ in Flooded Paddy Soils

机译：有机酸和质子对淹水水稻土中不可交换NH4 +释放的影响

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In a model experiment, which imitated the rhizosphere of rice, the effect of organic acids (oxalic acid, citric acid) and protons on the release of non-exchangeable NH4+ and the resin adsorption of N was studied in a paddy soil, typical for Zhejiang Province, China. Oxalic and citric acids under low pH conditions, in combination with proton secretion, favored the mobilization of NH4+ ions and increased resin adsorption of N. The release of non-exchangeable NH4+ was associated with less formation of iron oxides. These could coat clay minerals and thus hinder the diffusion of NH4+ ions out of the interlayer. Protons enhanced the release of NH4+, and then they could enter the wedge zones of the clay minerals and displace non-exchangeable NH4+ ions.

机译：在模仿水稻根际的模型实验中，研究了有机酸（草酸，柠檬酸）和质子对不可交换NH4 +的释放以及氮在树脂上的吸附的影响，该稻田以浙江省典型中国的省。在低pH条件下，草酸和柠檬酸与质子分泌结合，有利于NH4 +离子的迁移，并增加了N对树脂的吸附。不可交换的NH4 +的释放与较少的氧化铁形成有关。这些可能会覆盖粘土矿物，从而阻碍NH4 +离子从中间层扩散出去。质子增强了NH4 +的释放，然后它们可以进入粘土矿物的楔形区并置换不可交换的NH4 +离子。

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来源
《土壤圈（英文版）》 |2005年第3期|273-280|共8页
作者
ZHANG Yong-Song; SHAO Xing-Hua; LIN Xian-Yong; H. W. SCHERER;
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作者单位

Ministry of Education Key Lab of Enwronmental Remediation and Ecosystem Health, College of Natural Resources and Environmental Science, Zhejiang University, Hangzhou 310029 China;

Ministry of Education Key Lab of Enwronmental Remediation and Ecosystem Health, College of Natural Resources and Environmental Science, Zhejiang University, Hangzhou 310029 China;

Ministry of Education Key Lab of Enwronmental Remediation and Ecosystem Health, College of Natural Resources and Environmental Science, Zhejiang University, Hangzhou 310029 China;

Institute of Plant Nutrition, University of Bonn, Karlrobert-Kreiten-Str, 13, D-53115 Bonn Germany;

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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
中图分类稻;
关键词
ammonium release; exchange resin; non-exchangeable ammonium; paddy soil; root exudates;

机译：铵盐释放;交换树脂;不可交换铵盐;水稻土;根系分泌物;

Effect of Organic Acids and Protons on Release of Non-Exchangeable NH4+ in Flooded Paddy Soils

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