[1]YANG Min,ZHAO Xining,GAO Xiaodong,et al.Deep Soil Moisture Use of Planted Forests in the Loess Plateau[J].Research of Soil and Water Conservation,2019,26(06):100-106.

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Deep Soil Moisture Use of Planted Forests in the Loess Plateau

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 06 Page number: 100-106 Column: Public date: 2019-10-17

Title:: Deep Soil Moisture Use of Planted Forests in the Loess Plateau

Author(s):: YANG Min^1,2, ZHAO Xining^1,3,4, GAO Xiaodong^1,3,4, YANG Shiwei³; 1. Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. College of Water Resources and Architectural Engineering, Northwest A & F University, Yangling, Shaanxi 712100, China;
3. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
4. Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China

Keywords:: the Loess Plateau; planted forest; deep soil moisture; roots; soil texture

CLC:: S152.7

DOI:: -

Abstract:: Deep soil moisture use of planted forest in the Loess Plateau is discussed in this study, which is of great significance to sustainable development of revegetation. Based on field sampling of soil moisture of deep soil layers in the stands of Robinia pseudoacacia and Caragana Korshinskii Kom in the semi-humid zone, semi-arid zone and semi-arid/arid zone of the Loess Plateau, deep soil moisture consumption and deep soil moisture consumption rate were calculated to analyze the effect of afforestation on deep soil moisture in different climate zones. The results are as follows. (1) The soil moisture content of farmland is significantly higher than that of Robinia pseudoacacia and Caragana Korshinskii Kom. in different climate zones. Mean soil moisture contents in the depth of 0-800 cm of Robinia pseudoacacia and Caragana Korshinskii Kom. range from 6.64% to 11.01%, from 6.38% to 11.41%, respectively; with the lowest in the semi-arid/arid zone. (2) The deep soil moisture consumption and deep soil moisture consumption rate in the stands of Robinia pseudoacacia and Caragana Korshinskii Kom. are 808 mm, 698 mm and 32.33 mm/a, 31.76 mm/a, respectively. (3) Roots of the planted forests in semi-arid and semi-arid/arid zones are significantly active than those in semi-humid zones, especially in the depth of 0-300 cm layers, which has the great influence on soil moisture. (4) Soil texture is one of key factors affecting deep soil moisture status of planted forests. Soil moisture is positively correlated with the clay and silt contents and negatively correlated with sand content. The clay content increases gradually in semi-arid/arid zone, semi-arid zone and semi-humid zone, while the sand content is opposite. Afforestation has different impacts on deep soil moisture in different climate zones, and the deep soil moisture is greatly influenced by roots and soil texture. Thus, it is very important to choose the suitable vegetation arrangement pattern to protect and sustainably utilize the deep soil moisture.

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