干旱区生态环境知识资源中心(Arid): 基于Le Bissonnais法的石漠化区桑树地埂土壤团聚体稳定性研究

Arid

	基于Le Bissonnais法的石漠化区桑树地埂土壤团聚体稳定性研究
其他题名	Study on soil aggregates stability of mulberry ridge in Rocky Desertification based on Le Bissonnais method
	汪三树 1; 黄先智 2; 史东梅 1; 郭彦军 3; 郭宏忠 4; 彭旭东 1; 李叶鑫 1
来源期刊	生态学报
ISSN	1000-0933
出版年	2013
卷号	33 期号:18 页码:5589-5598
中文摘要	石漠化区独特的水土流失作用使该区土壤严重退化,地埂植物作为一种独特的农林复合模式对石漠化区土地质量改善和坡耕地土壤生态修复作用明显,能有效保证坡耕地的生态条件和生产性能。选取石漠化区3种不同管理方式的桑树地埂为研究对象,采用传统湿筛(Cаввинов法)和Le Bissonnais法测定土壤团聚体分布与稳定性特征。结果表明:基于Cаввинов法测定的土壤团聚体稳定性以天然林最好,桑埂自然生草地和清草地相对居中,桑埂农地最差;3种管理方式的桑树地埂土壤团聚体稳定性指数(ASI)随地埂距离均表现为ASI90cm>ASI60cm>ASI30cm,主要原因在于桑树地埂对坡耕地土壤团聚体影响的作用范围主要集中在距株30 cm以内,而在地埂30 cm以外田面农耕活动对土壤团聚体结构影响较大,而受桑树地埂影响作用较小。基于Le Bissonnais法快速湿润(FW)处理后土壤团聚体集中分布在0.50.25 mm之间,慢速湿润(SW)和湿润振荡(WS)处理后团聚体主要分布在51 mm之间。Le Bissonnais法处理后土壤团聚体稳定性表现趋势与Cаввинов法一致,3种处理后的团聚体分形维数D、MWD和GMD均表现为FW
英文摘要	Soil aggregate is the basic unit of soil structure,and its stability is closely related to soil erosion-resistance. Soil and water loss makes the soil degradation severer in the specific rocky desertification area. Ridge plant,one of the special agroforestry pattern,plays important roles in improving soil quality and ecological restoration of slope land in rocky desertification area. Qianjiang is a typical rocky desertification area in Chongqing,where mulberrywas widely planted and becomes one of the main economic forest and ridge plants. In order to explore the stability mechanism of soil aggregate, mulberry ridges with three different management modes were selected in this study. The distribution and stability of soil aggregates were measured by traditional Cаввинов method and Le Bissonnais method. The results showed that the stability of soil aggregates based on Cаввинов methods was the best in natural forest land,followed by natural grassland and weeded land,and was the worst in farmland. The aggregate stability index (ASI) followed the order of ASI90cm>ASI60cm>ASI30cm in the three management models. The R0. 25 water stable aggregate increased with increasing distances from ridge,while the aggregate destruction rate (PAD) decreased. The possible reason might be as follows: The effects of mulberry ridge on soil aggregates mainly cover areas within 30 cm,while the agricultural cultivation greatly influenced soil aggregates structure in areas beyond 30 cm with little effect from the ridge. Based on Le Bissonnais methods,the majority of aggregates were broken down to small aggregates by fast wetting (FW) treatment. The distribution of soil aggregates was in the category of 0. 50. 25 mm with diameter after FW,and 51 mm after SW and WS. The fractal dimensions (D) of aggregates was the highest (2. 53) after FW and the lowest after WS (2. 33). The changes of soil aggregates stability with Le Bissonnais and Cаввинов method were similar. The fractal dimensions (D),mean weight diameter (MWD) and geometrical mean diameter(GMD) presented the trend of FW
中文关键词	土壤团聚体 ; 稳定性 ; 桑树地埂 ; LeBissonnais法 ; 石漠化区
英文关键词	soil aggregate the stability mulberry ridge Le Bissonnais method rocky desertification area
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5048575
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230026
作者单位	1.西南大学资源环境学院,西南大学水土保持生态环境研究所, 重庆 400716, 中国; 2.西南大学蚕学与系统生物研究所, 重庆 400716, 中国; 3.西南大学动物科技学院, 重庆 400716, 中国; 4.重庆市水土保持生态环境监测总站, 重庆 401147, 中国
推荐引用方式 GB/T 7714	汪三树,黄先智,史东梅,等. 基于Le Bissonnais法的石漠化区桑树地埂土壤团聚体稳定性研究[J],2013,33(18):5589-5598.
APA	汪三树.,黄先智.,史东梅.,郭彦军.,郭宏忠.,...&李叶鑫.(2013).基于Le Bissonnais法的石漠化区桑树地埂土壤团聚体稳定性研究.生态学报,33(18),5589-5598.
MLA	汪三树,et al."基于Le Bissonnais法的石漠化区桑树地埂土壤团聚体稳定性研究".生态学报 33.18(2013):5589-5598.