[1]李肖,陈晨,林杰,等.侵蚀强度对淮北土石山区土壤团聚体组成及稳定性的影响[J].水土保持研究,2019,26(04):56-61,67.
　LI Xiao,CHEN Chen,LIN Jie,et al.Effect of Erosion Intensity on Composition and Stability of Soil Aggregates in Rocky Mountain Area of Huaibei[J].Research of Soil and Water Conservation,2019,26(04):56-61,67.
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侵蚀强度对淮北土石山区土壤团聚体组成及稳定性的影响

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 26 期数: 2019年04期 页码: 56-61,67 栏目: 出版日期: 2019-06-11
Title:
Effect of Erosion Intensity on Composition and Stability of Soil Aggregates in Rocky Mountain Area of Huaibei
作者:
李肖1, 陈晨1, 林杰1, 朱茜1, 董波1, 丁鸣鸣2
1. 南京林业大学, 江苏省南方现代林业协同创新中心, 江苏省水土保持与生态修复重点实验室, 南京 210037;
2. 南京水务局, 南京 210036
Author(s):
LI Xiao1, CHEN Chen1, LIN Jie1, ZHU Xi1, DONG Bo1, DING Mingming2
1. Jiangsu Province Key Laboratory of Soil and Water Conservation and Ecological Restoration, Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing 210037, China;
2. Nanjing Water Conservancy Bureau, Nanjing 210036, China
关键词:
土壤侵蚀; 土壤团聚体; 侵蚀强度; 稳定性
Keywords:
soil erosion; soil aggregates; erosion intensity; stability
分类号:
S714
摘要:
为更好地揭示土壤侵蚀与土壤团聚体之间的关系，选取大吴山小流域为研究区，以4种土地利用下的土壤团聚体为研究对象，分析了不同侵蚀强度下各土地利用方式土壤团聚体的粒径组成及稳定性特征。结果表明：（1）研究区土壤团聚体主要以大团聚体（> 0.25 mm）为主，其比例均 > 70%，与同类报道相比偏低，说明该区土壤流失严重，水土保持工作需进一步开展。（2）随侵蚀强度增加，> 2 mm团聚体含量有降低的趋势，< 0.106 mm则刚好相反，0.5~0.25 mm和1~0.5 mm团聚体含量明显变化，说明侵蚀过程倾向于破坏大团聚体，增加微团聚体百分含量，其中0.5 mm对侵蚀强度转变响应敏感。（3）土壤团聚体稳定性指标R0.25，MWD与侵蚀强度呈负相关，D值呈正相关，且严重侵蚀条件下，MWD和R0.25均为最小值，D值达到最大，说明严重侵蚀会降低土壤团聚体稳定性。（4）同种侵蚀强度下，相较于其他3种土地利用式，林地的R0.25和MWD值较高，D值较小，说明林地结构较好，有利于团聚体的积累，稳定性高。
Abstract:
In order to better reveal the relationship between soil erosion and soil aggregate, this paper selects the small watershed of Dawushan as the study area, and takes the soil aggregate under four types of land use as the study object. The particle size composition and stability characteristics of soil aggregates in different land use patterns under different erosion intensities were analyzed. The results showed that: (1) the main soil aggregates in the study area were macroaggregates (> 0.25 mm), the proportion of which was more than 70%, which was lower than that of the similar reports, which indicated that the soil loss was serious in the study area. Soil and water conservation work needs to be further carried out. (2) with the increase of erosion intensity, > 2 mm aggregate content decreased, < 0.106 mm was just the opposite, 0.5~0.25 mm and 1~0.5 mm aggregate contents changed obviously. The results showed that the erosion process tended to destroy macroaggregates and increase the percentage content of microaggregates, and 0.5 mm was sensitive to erosion intensity transition. (3) the soil aggregate stability index R0.25 and MWD are negatively correlated with the erosion intensity, and the D value is positively correlated. Under severe erosion conditions, both MWD and R0.25 are minimum, and the D value is maximum, indicating that severe erosion will reduce the stability of soil aggregates. (4) under the same erosion intensity, compared with the other three types of land use, the values of R0.25 and MWD were higher and D values were smaller, which indicated that the structure of woodland was better, which was beneficial to the accumulation of aggregates and had high stability.

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备注/Memo

收稿日期:2018-11-10;改回日期:2019-01-02。
基金项目:国家重点研发计划课题2017YFC0505505；国家自然科学基金（31870600）；江苏高校优势学科建设工程资助项目
作者简介:李肖(1995-),男,江苏连云港人,硕士,主要从事水土保持与荒漠化防治。E-mail:1143390166@qq.com
通讯作者:林杰(1972-),女,辽宁丹东人,副教授,主要从事水土保持与遥感监测。E-mail:jielin@njfu.edu.cn

更新日期/Last Update: 1900-01-01