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[1]ZONG Qiaoyu,AI Ning,LIU Guangquan,et al.Effects of Different Abandonment Years on Deep Soil Water of Ziziphus jujube(Mill.)Forest in Loess Area of Northern Shaanxi[J].Research of Soil and Water Conservation,2021,28(04):70-76.

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Effects of Different Abandonment Years on Deep Soil Water of Ziziphus jujube(Mill.)Forest in Loess Area of Northern Shaanxi

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 04 Page number: 70-76 Column: Public date: 2021-08-10

Title:: Effects of Different Abandonment Years on Deep Soil Water of Ziziphus jujube(Mill.)Forest in Loess Area of Northern Shaanxi

Author(s):: ZONG Qiaoyu¹, AI Ning^1,2, LIU Guangquan², ZHANG Jun³, GUO Hongyan³, LIU Changhai¹, QIANG Fangfang¹, HAO Baobao¹, WANG Yike¹; (1.College of Life Science/Shaanxi Key Laboratory of Chinese Jujube, Yan'an University, Yan'an, Shaanxi 716000, China; 2.China Institute of Water Resources and Hydropower Research, Beijing 100044, China; 3.Zichang Municipal Management Office for Returning Farmland to Forest Project, Zichang, Shaanxi 717300, China)

Keywords:: loess area in northern Shaanxi; jujube forest; abandoned land; soil water

CLC:: S152.7

DOI:: -

Abstract:: In order to study the seasonal dynamic changes of soil water characteristic under different fixed number of year of the abandoned Ziziphus jujube(Mill.)forest in northern Shaanxi loess area, we selected Qijiashan jujube test base of Yanchuan County, northern Shaanxi jujube experiment demonstration base of different fixed number of year of the abandoned mountain Ziziphus jujube as the main research site, and abandoned forest and abandoned grass as the controls, examined the soil moisture of the 0—340 cm soil layer by the soil drilling sampling method. The results show that:(1)the soil moisture in growing season in the woodland under different fixed number of year of the abandoned shows the volatile changes with the seasons, and soil water seasonal variation decreases with the increase of soil depth;(2)there are significant differences in the average soil water content of jujube forest under different years of fallow(p<0.05); in the growing season, the average soil water content decreases in the order: 3 a>6 a>1 a>20 a, and there are also significant differences in the average soil water content under different vegetation types(p<0.05);(3)the soil desiccant intensity of each forest land under different fallow years is slightly desiccant, with the average desiccant index ranging from 0.17% and 1.23%;(4)the compensation degree of soil water storage in summer in the 40 cm to 140 cm soil layer of jujube forest lands with the fallow of 1 years, 3 years and 6 years fluctuates basically between the equilibrium value, indicating that the soil water consumption and supplement of the fallow jujube forest lands in this soil layer basically reaches the balance during the growing season. The rainfall in summer does not compensate for the soil water deficit in the jujube forest with 20-year abandonment, and the soil water deficit is not improved. In summary, studying the dynamic changes of soil moisture in jujube forests in mountainous areas under different abandonment years is of great significance to the reuse of abandoned land in this area.

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Last Update: 2021-08-20