Effect of straw mulching on sediment yielding process of soil with different initial water contents

被引：0

作者：

Liu L. ^{[1
,2
]}

Ren H. ^{[1
]}

Shi X. ^{[1
]}

Yu D. ^{[1
]}

Wang H. ^{[1
]}

Sun W. ^{[1
]}

Zhang L. ^{[1
,3
]}

机构：

[1] State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Acad. of Sci.

[2] Graduate School of Chinese Acad. of Sci.

[3] College of Resources and Environmental Sciences, Nanjing Agricultural University

来源：

Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | 2010年 / 26卷 / 01期

关键词：

Erosion; Mulching; Sediment yield rate; Simulated rainfall; Soil moisture; Straw;

D O I：

10.3969/j.issn.1002-6819.2010.01.018

中图分类号：

学科分类号：

摘要：

Mulch with a layer of plant residue is an effective method for water and soil conservation. A laboratory experiment was conducted to evaluate the effect of antecedent soil moisture and straw mulching on sediment yielding process using rainfall simulator. The rainfall simulator was used to create rainfall intensity of 60 mm/h for 1 h. The study site was located at the ecological experimental research station of red soil, Chinese Academy of Sciences, in Yujiang County, Jiangxi Province of China. The soil used in this study was cultivated cambisol derived from red sandstone. The erosion plot was 12 m in length and 3 m in width with a slope of 9%. Antecedent soil moisture levels (dry, wet) and coverage degrees of straw mulching (0, 15%, 30%, 60% and 90%) were considered as two independent variables in this factorial design experiment. For the dry soils with the coverage degrees of 0, 15%, 30%, 60% and 90%, the average sediment yield rates within one hour was 24.5, 15.8, 10.4, 11.2, and 1.0 g/(m2·h), respectively. The sediment yield rates of the dry soils tended to increase slightly in the rainfall duration for a given percent ground cover. For the wet soils with the coverage degrees of 0, 15%, 30%, 60% and 90%, the average sediment yield rates with one hour were 115.6, 70.0, 49.6, 34.8, 31.9 g/(m2·h), respectively. Sediment yield rate of the wet soil decreased quickly during the simulated rainfall for a given percent ground cover. The average sediment yield rates in stable condition were 52.5, 30.5, 22.8, 19.8 and 15.4 g/(m2·h) with the coverage degrees of 0, 15%, 30%, 60% and 90%, respectively. The results indicate that coverage degree significantly affect sediment yield rate. Also, the coverage degree of 30% will effectively control runoff and soil loss.

引用

页码：108 / 112

页数：4

共 18 条

[1] Li R., Opportunities and challenges of basic research on soil and water loss in China, Chinese Journal of Nature, 30, 1, pp. 6-11, (2008)
[2] Martinez-Fernandez J., Ceballos A., Temporal stability of soil moisture in a large-field experiment in Spain, Soil Sci Soc Am J, 67, pp. 1647-1656, (2003)
[3] Wischmeier W.H., Relation of field-plot runoff to management and physical factors, Soil Sci Soc Am Proc, 30, pp. 272-277, (1966)
[4] Pan C., Shangguan Z., Runoff hydraulic characteristics and sediment generation in sloped grassplots under simulated rainfall conditions, Journal of Hydrology, 331, 1-2, pp. 178-185, (2006)
[5] Mathys N., Klotz S., Esteves M., Et al., Runoff and erosion in the Black Marls of the French Alps: Observations and measurements at the plot scale, Catena, 63, 2-3, pp. 261-281, (2005)
[6] Cai Q.G., Wang H., Curtin D., Et al., Evaluation of the EUROSEM model with single event data on Steeplands in the Three Gorges Reservoir Areas, China, Catena, 59, 1, pp. 19-33, (2005)
[7] Lado M., Ben-Hur M., Shainberg I., Soil wetting and texture effects on aggregate stability, seal formation and erosion, Soil Sci Soc Am J, 68, pp. 1992-1999, (2004)
[8] Gimeno-Garcia E., Andreu V., Rubio J.L., Influence of vegetation recovery on water erosion at short and medium-term after experimental fires in a Mediterranean shrubland, Catena, 69, 2, pp. 150-160, (2007)
[9] Zheng J., He X., Walling D., Et al., Assessing soil erosion rates on manually-tilled hillslopes in the Sichuan Hilly Basin using 137Cs and 210Pbex measurements, Pedosphere, 17, 3, pp. 273-283, (2007)
[10] Wei L., Zhang B., Wang M., Effects of antecedent soil moisture on runoff and soil erosion in alley cropping systems, Agricultural Water Management, 94, 1-3, pp. 54-62, (2007)

← 1 2 →