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Int. J. Environ. Res. Public Health 2018, 15(1), 9; doi:10.3390/ijerph15010009

Efficacy of Natural Polymer Derivatives on Soil Physical Properties and Erosion on an Experimental Loess Hillslope

1
School of Geography and Tourism, Shaanxi Normal University, Xi’an 710019, China
2
National Demonstration Center for Experimental Geography Education, Shaanxi Normal University, Xi’an 710019, China
3
State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China
4
Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Yangling 712100, China
*
Author to whom correspondence should be addressed.
Received: 28 October 2017 / Revised: 19 December 2017 / Accepted: 20 December 2017 / Published: 22 December 2017
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Abstract

Raindrops disperse large soil aggregates into smaller particles, which can clog soil pores, cause soil crusting, reduce rainfall infiltration and increase soil loss. It was found that natural polymer derivatives were effective in improving soil physical properties and decreasing soil erosion on an experimental loess hillslope. This study investigated the effect of new natural polymer derivatives (Jag S and Jag C162) on soil properties, rainfall infiltration and sediment yield at four rates of sprayed polymers (0, 1, 3 and 5 g/m2), three rainfall intensities (1, 1.5 and 2 mm/min) and a slope gradient of 15° with a silt loam soil through simulated rain. The results showed that both Jag S and Jag C162 significantly increased the shear strength and improved the aggregates composition of the soil surface. The water-stable soil aggregates >0.25 mm increased from 9% to 50% with increasing rates of Jag S and Jag C162. Jag S and Jag C162 also effectively increased rainfall infiltration and final infiltration rate, and reduced erosion compared to controls without natural polymer derivatives added. However, higher rates of Jag S produced lower infiltration rates. Although both Jag S and Jag C162 effectively influenced soil physical properties and erosion, the effect of Jag C162 was more significant than that of Jag S. View Full-Text
Keywords: natural polymer derivatives; rainfall infiltration; soil aggregate; shear strength; soil loss natural polymer derivatives; rainfall infiltration; soil aggregate; shear strength; soil loss
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Liu, J.; Wang, Z.; Li, Y. Efficacy of Natural Polymer Derivatives on Soil Physical Properties and Erosion on an Experimental Loess Hillslope. Int. J. Environ. Res. Public Health 2018, 15, 9.

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