[1]汪明霞,朱志锋,刘凡,等.江汉平原不同土地利用方式下农田土壤有机碳组成特点[J].水土保持研究,2012,19(06):24-28.
　WANG Ming-xia,ZHU Zhi-feng,LIU Fan,et al.Composition Characteristics of Soil Organic Carbon under Land Use Change in Jianghan Plain, Hubei Province[J].Research of Soil and Water Conservation,2012,19(06):24-28.
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江汉平原不同土地利用方式下农田土壤有机碳组成特点

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 19 期数: 2012年06期 页码: 24-28 栏目: 出版日期: 2012-12-20
Title:
Composition Characteristics of Soil Organic Carbon under Land Use Change in Jianghan Plain, Hubei Province
作者:
汪明霞1, 朱志锋1, 刘凡1, 谭文峰1,2
1. 农业部 长江中下游耕地保育重点实验室, 华中农业大学 资源与环境学院, 武汉 430070;
2. 中国科学院 水利部 水土保持研究所, 黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西 杨凌 712100
Author(s):
WANG Ming-xia1, ZHU Zhi-feng1, LIU Fan1, TAN Wen-feng1,2
1. Key Laboratory of Arable Land Conservation in Middle and Lower Reaches of Yangtse River, Ministry of Agriculture, Huazhong Agricultural University, Wuhan 430070, China;
2. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China
关键词:
土壤; 活性有机碳; 稳定性有机碳; 土地利用; 江汉平原
Keywords:
soil; active organic carbon; stable organic carbon; land use; Jianghan Plain
分类号:
S153.6
摘要:
以江汉平原四湖地区的果园、旱地、水田和水旱轮作等土壤为研究对象,通过分析其总有机碳与活性有机碳含量、腐殖质与轻重组组成特点,以期阐明不同土地利用方式对农田土壤有机碳组成的影响.结果表明:不同利用方式下表层土壤有机碳含量差异较大,其中以水田最高、果园最小,随着土壤剖面深度的增加,有机碳含量逐步降低;腐殖质占总有机碳比例较高,其中果园和旱地大于0.91,水旱轮作略低,而水田仅为0.78;不同利用方式下,各形态的腐殖质碳含量存在差异,活性较高的富里酸在水田和水旱轮作土壤中含量相对较高;稳定性有机碳占总有机碳的百分比大小顺序为:水旱轮作≈旱地>果园>水田,轻组组分在各利用方式下表现为:水田>旱地>果园>水旱轮作,而水旱轮作下重组碳容量占总有机碳的百分比最高.这表明水旱轮作既有利于土壤有机碳的积累,又利于土壤有机碳稳定性的增加.上述结果可为该区土壤管理措施的制订提供科学参考.
Abstract:
The soil samples in orchard, dryland, paddy, and the field with dryland and paddy rotation were collected from Houhu state farm of Qianjiang City, Hubei Province, where is the centre of Jianghan plain. The total and active organic carbon, composition of humus, and light and heavy fractions were measured. The contents of organic carbon (OC) in topsoil were different under land use changes. The OC content for paddy soil was the highest and that for orchard soil was the lowest. The ratios of OC in humus to total SOC for orchard, dryland, paddy, and rotation soil were 0.98, 0.91, 0.78 and 0.86, respectively. The contents of OC in fulvic acid for paddy and rotation soils were higher than those in other soils. The proportion of stable organic carbon in total SOC was in the order of rotation≈dryland>orchard>paddy, and the light fraction followed the sequence of paddy>dryland>orchard>rotation. It was suggested that the SOC content would be increased under water culture. However, the SOC stability decreased under water culture, and it would lost easily when the environment changed. Rotation soil should be paid attention, which was both high in total and stable OC content. It indicates that rotation culture will not only increase SOC content, but also increase SOC stability. These results will be helpful to provide scientific references to develop rational ways of soil management and cultivation.

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备注/Memo

收稿日期:2012-5-3;改回日期:2012-7-11。
基金项目:国家自然科学基金项目(40971144,41201231)
作者简介:汪明霞(1975- ),女,湖北咸宁人,博士,讲师,主要从事土壤化学与环境模拟方面的研究.E-mail:wangmx@mail.hzau.edu.cn
通讯作者:谭文峰(1971- ),男(土家族),湖北巴东人,博士,教授,主要从事土壤化学与环境研究.E-mail:wenfeng.tan@hotmail.com

更新日期/Last Update: 1900-01-01