干旱区生态环境知识资源中心(Arid): 土壤紧实度对裸土侵蚀强度影响的实验与分析

Arid

	土壤紧实度对裸土侵蚀强度影响的实验与分析
其他题名	Experimental analysis of soil compactness on erosion intensity of bare soil
	刘文虎; 魏振康; 肖理; 殷庆元; 王章文; 黄成敏
来源期刊	中国水土保持科学
ISSN	2096-2673
出版年	2019
卷号	17 期号:6 页码:52-60
中文摘要	水土流失是世界性生态环境问题之一,合理地估算土壤侵蚀模数是有效治理水土流失的关键。现有的各种土壤侵蚀模型评估以及土壤侵蚀模数估算方法受人力、经济成本、技术等因素限制难以广泛运用。因此,作者利用设在云南、四川等地微型径流小区,结合模拟降雨实验研究土壤侵蚀模数(M)与土壤紧实度(C)间的关系 ,探讨以C来估算M的可能性。结果表明:土壤紧实度和土壤侵蚀模数的大小与土壤含水率、水稳性团聚体含量、黏粒含量、有机质含量等密切相关。土壤侵蚀模数随土壤土壤紧实度的增加而减小,土壤紧实度相对高的耕地,土壤侵蚀模数小,土壤侵蚀模数与土壤紧实度呈极显著负相关关系(P < 0.01) ,拟合方程为: M = 42.423e~(0.009S)(S = C,P < 0.01,R~2 = 0.663) 。因此,对于无作物生长的农田土壤(土壤紧实度SC < 450 kPa) ,利用土壤紧实度可以迅速、低成本地反映土壤侵蚀模数大小,评估土壤侵蚀发生的潜在强度。
英文摘要	[Background]Soil erosion is a critical environmental issue in the world's terrestrial ecosystems. Erosion accelerates land degradation and desertification processes. Due to the rapid runoff of water,soil fertility and crop yields decrease,and the quality of water is affected by the agricultural chemicals deposited in waterways. Conclusively,soil erosion causes multiple and severe damages to natural ecosystems. Indeed,achieving a safe living environment in the future depends on protecting the soil and water resources. Reasonable estimation of soil erosion modulus is the key to controlling soil erosion. However,an extensively applicable method for soil erosion modulus estimation is limited by the time consumption,technology and cost,etc. [Methods]In order to eliminate as much as possible the impact of other factors such as vegetation cover on soil erosion,here,the authors searched for slopes with similar gradients and almost no vegetation coverage in the mountainous areas of Yunnan and Sichuan provinces,southwest China,and arranged a micro-runoff plot of 1 m * 2 m. The simulated rainfall experiment was carried out with the same rainfall intensity to explore the relationship between soil erosion modulus (M) and soil compactness (C) ,and the influence of SC on soil erosion process,and to probe the possibility of application of C on estimating M. [Results]C and M were closely related to soil water content,water stable aggregate content,clay content and organic matter content. In the case of large C, the soil particles were closely arranged,the cohesive force between the soil particles was large,and the soil was resistant to disintegration and deposition. On the contrary,the pores between the soils with lower C were larger,and the soil particles were easily dispersed by raindrops and washed away by runoff. In general,M decreased with the increase of C. The soil with relatively high C,M was small,and M was a very significant negative correlation at 0.01 level with C. The relationship between M and C was quantified as: M = 42.423e~(0.009S) (S = C,P < 0.01,R~2 = 0.663). [Conclusions] The results of this research provide a reference method for estimating the erosion modulus of farmland soil without crop growth. The increase in C changes the pore continuity between soil particles and reduces soil infiltration ability,but also increases soil erosion resistance and reduces the possibility of soil erosion. Conversely, soil erosion can easily occur. Therefore,for cultivated soils without crop growth (C < 450 kPa) ,C to some extent can quickly and cost-effectively reflect the magnitude of M and assess the potential intensity of soil erosion.
中文关键词	土壤侵蚀 ; 土壤性质 ; 土壤紧实度 ; 土壤侵蚀模数 ; 裸土
英文关键词	soil erosion soil properties soil compactness soil erosion modulus bare soil
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6647891
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353300
作者单位	刘文虎, 四川大学环境科学与工程系, 成都, 四川 610065, 中国. 魏振康, 四川大学环境科学与工程系, 成都, 四川 610065, 中国. 肖理, 四川大学环境科学与工程系, 成都, 四川 610065, 中国. 殷庆元, 四川大学环境科学与工程系, 成都, 四川 610065, 中国. 王章文, 四川大学环境科学与工程系, 成都, 四川 610065, 中国. 黄成敏, 四川大学环境科学与工程系, 成都, 四川 610065, 中国.
推荐引用方式 GB/T 7714	刘文虎,魏振康,肖理,等. 土壤紧实度对裸土侵蚀强度影响的实验与分析[J],2019,17(6):52-60.
APA	刘文虎,魏振康,肖理,殷庆元,王章文,&黄成敏.(2019).土壤紧实度对裸土侵蚀强度影响的实验与分析.中国水土保持科学,17(6),52-60.
MLA	刘文虎,et al."土壤紧实度对裸土侵蚀强度影响的实验与分析".中国水土保持科学 17.6(2019):52-60.