3种土壤对水溶性有机物的吸附和解吸研究 | |
杨佳波; 曾希柏; 李莲芳; 白玲玉 | |
刊名 | 中国农业科学
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2008 | |
卷号 | 41期号:11页码:3656-3663 |
关键词 | 土壤 水溶性有机物 吸附 解吸 |
ISSN号 | 0578-1752 |
其他题名 | Adsorption and Desorption of Dissolved Organic Matter (DOM)in Soils |
英文摘要 | 【目的】了解不同类型土壤对水溶性有机物的吸附和解吸差异,为有机肥的合理施用以及进一步研究其化学行为提供参考。【方法】选择普通肥熟旱耕人为土(黑土母质发育)、石灰肥熟旱耕人为土(褐土母质发育)和酸性肥熟旱耕人为土(第四纪红壤母质发育)3种理化性质差异较大的土壤,开展添加水溶性有机物(DOM)后不同吸附时间下土壤对DOM的吸附和解吸试验,并利用相关模型计算了土壤对DOM吸附和解吸的参数。【结果】外源DOM进入土壤后,能很快被土壤胶体吸附,并在1h内达到平衡;3种土壤对DOM的吸附差异明显,其达到平衡时的吸附量分别为10236、8372和10088mg·kg~(-1),即以有机质含量高的普通肥熟旱耕人为土和pH低的酸性肥熟旱耕人为土对DOM的吸附量大;3种土壤对所吸附DOM的解吸量比较,在吸附量达到最大时,解吸量占吸附量的比例分别为63.2%、42.1%和93.3%;3种土壤对所吸附DOM的解吸能力比较,亦为酸性肥熟旱耕人为土〉普通肥熟旱耕人为土〉石灰肥熟旱耕人为土。【结论】土壤性质与其对DOM的吸附和解吸密切相关,因此,不同类型土壤在有机肥施用量和施用方法上也需要相应进行改变。; [ Obiective ] The objective of this investigation was to compare the difference of adsorption/desorption of dissolved organic matter (DOM) in different types of soils, and to give guidance of correct application of organic fertilizer and further research on corresponding chemical behavior of DOM. [ Method ] Three kinds of soils including Typic Fimi-Orthic Anthrosols (black soils-- parent material), Calcaric Fimi-Orthic Anthrosols (cinnamon soils-parent material) and Dystric Fimi-Orthic Anthrosols (quaternary red clay-parent material) with great difference each other were selected for studying the adsorption, desorption and fixation of DOM. Some parameters on adsorption/desorption of DOM in soils were calculated using corresponding model through the adsorption/desorption experiment under the condition of different amounts of DOM added into soils at various times. [ Result] The study indicated that DOM from external source could be adsorbed by soil colloid, and adsorption and desorption of DOM would reach the balance within one hour. There was a great difference in the adsorption of DOM among the three kinds of soils, and the greatest adsorped amount of DOM in Typic Fimi-Orthic Anthrosols, Calcaric Fimi-orthic Anthrosols and Dystric Fimi-orthic Anthrosols was 10 236, 8 372 and 10 088 mg·kg~(-1), respectively, when the balance between adsorption and desorption appeared, suggesting the relatively higher amount by adsorption occurred in Typic Fimi-Orthic Anthrosols with relatively higher organic matter content and in Dystric Fimi-Orthic Anthrosols and relatively lower pH value. In comparison with the desorption ability of three kinds of soils, the decreasing order rank was Dystric Fimi-Orthic Anthrosols〉Typic Fimi-Orthic Anthrosols〉Calcaric Fimi-Orthic Anthrosols. [ Conclusion]There is a close relationship between the soil quality and DOM amount in soils through desorption/sorption process. Therefore, some changes in the application amount and methods of organic fertilizer are needed for different types of soils, |
学科主题 | 农业基础科学 |
语种 | 中文 |
内容类型 | 期刊论文 |
源URL | [http://111.203.20.206/handle/2HMLN22E/17337] ![]() |
专题 | 农业环境与可持续发展研究所_环境修复研究室 |
作者单位 | 中国农业科学院农业环境与可持续发展研究所, 农业部农业环境与气候变化重点开放实验室, 北京, 100081 |
推荐引用方式 GB/T 7714 | 杨佳波,曾希柏,李莲芳,等. 3种土壤对水溶性有机物的吸附和解吸研究[J]. 中国农业科学,2008,41(11):3656-3663. |
APA | 杨佳波,曾希柏,李莲芳,&白玲玉.(2008).3种土壤对水溶性有机物的吸附和解吸研究.中国农业科学,41(11),3656-3663. |
MLA | 杨佳波,et al."3种土壤对水溶性有机物的吸附和解吸研究".中国农业科学 41.11(2008):3656-3663. |
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