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[1]LÜ,Du,YANG Yahui,et al.Impacts of Vegetation Types on Soil Water Distributions in Loess Hilly Region[J].Research of Soil and Water Conservation,2018,25(04):60-64.

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Impacts of Vegetation Types on Soil Water Distributions in Loess Hilly Region

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 04 Page number: 60-64 Column: Public date: 2018-06-13

Title:: Impacts of Vegetation Types on Soil Water Distributions in Loess Hilly Region

Author(s):: LÜ Du¹, YANG Yahui^2,3, ZHAO Wenhui¹, Muretijiang·Abula¹, LIN Pengfei^2,3, ZHANG Xiaoping¹; 1. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China;
3. University of Chinese Academy of Sciences, Beijing 100049, China

Keywords:: forestry; soil water content; precipitation; vegetation types

CLC:: S152.7

DOI:: -

Abstract:: In order to understand the effects of vegetation on soil water content and investigate the eco-hydrological processes, four vegetation types (grassland, Hippophae rhamnoides L., Pinus tabuliformis Carr., mixed forest of Hippophae rhamnoides L. and Pinus tabuliformis Carr.) in four runoff plots were investigated in Wangdong Watershed, Changwu County, Shaanxi Province. Neutron moisture meter was used to estimate the soil water content along 0—500 cm soil profile in a hydrological year from May 2013 to April 2014. The results showed that: (1) the average soil water content under the natural grass was significantly higher than that in the other three vegetation types, while it did not show significant difference among the vegetation types with Hippophae rhamnoides L., Pinus tabuliformis Carr. and mixed forest of Hippophae rhamnoides L. and Pinus tabuliformis Carr.; the average soil water content under the natural grass showed the increasing trend in the soil profile, while under the other three vegetation types it showed out the reversed S-shape; (2) in general, the soil water contents in the 0—500 cm soil profile under the natural grass and Pinus tabuliformis Carr. were more stable with smaller variation coefficients than that under the Hippophae rhamnoides L. and the mixed forest; for all the four vegetation types, the average soil water contents in spring and winter were significantly different with those in summer and autumn; soil water showed the accumulative effect in spring and winter and the depleting effect in summer and autumn; (3) rainfall had a significantly effect on soil water content in 0—200 cm soil profile, however, this effect tended to disappear in the 200—500 cm soil depth; it is various that vegetation types enhanced the discrepancy of soil water storage. The conclusions are as follows. Soil water content under the natural grassland was higher and less variable, while under shrub and arbor trees it was lower and more variable. The change of soil water content showed the coincident trend under precipitation input and temperature alteration along the soil profile and over the time, the effect of vegetation types signified the obvious response of soil water content to precipitation and temperature on the basis of consistency.

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