Improvement of soil quality by Chinese dwarf cherry cultivation in the Loess Plateau steep hill region

doi:10.11686/cyxb2016233

Abstract

Abstract: In the process of ecological restoration in the Loess Plateau hilly gully region, selection of species for planting is important. Recently, Chinese dwarf cherry (Cerasus humilis) has been used for vegetation restoration in this region, but its ecological impact needs to be systematically evaluated. In this study, 5-year-old plantings of Chinese dwarf cherry and Chinese pine (Pinus tabulaeformis) on level terraces near Liuyu town in Liulin county, Shanxi province, in the steep hill region of the Loess Plateau were compared. Soil samples were collected from 20 and 40 cm depth under the canopy of Chinese dwarf cherry bushes (UCC₂₀, UCC₄₀) and from the same soil depths at inter-row sites (IRC₂₀, IRC₄₀), and corresponding samples were collected from P. tabulaeformis plantations (designated UCP₂₀ & UCP₄₀), to compare the effects of the two plant species on soil properties. It was found that: 1) compared with inter-row soil in Chinese dwarf cherry (IRC₂₀ and IRC₄₀), the pH values, nutrient contents (except available phosphorus) and enzyme activity values (except catalase activity for UCC₄₀) were improved to differing degrees; 2) planting with Chinese dwarf cherry (C) or pine (P) each had their own respective advantages. Alkali-hydrolysable nitrogen, total phosphorus content and enzyme activities of soil under the canopy of C (UCC₂₀ and UCC₄₀) were superior to those of P plantations (UCP₂₀ and UCP₄₀), while soil water content, electrical conductivity and other nutrient levels under the canopy of C were reduced compared to those under P. Results of a principal component analysis indicated that key factors for differentiation between different soil samples were, in descending order, invertase activity, organic matter content, pH value, total phosphorus, alkali-hydrolysable nitrogen and alkaline phosphatase activity. Mean scores for principal component 1 ranked in descending order: UCC₂₀, UCP₂₀, UCC₄₀, IRC₂₀, UCP₄₀ and IRC₄₀. In summary, the cultivation of Chinese dwarf cherry significantly enhanced comprehensive soil quality of the Loess Plateau steep hill region.

WANG Peng-Fei, JIA Lu-Ting, DU Jun-Jie, ZHANG Jian-Cheng, MU Xiao-Peng, DING Wei. Improvement of soil quality by Chinese dwarf cherry cultivation in the Loess Plateau steep hill region[J]. Acta Prataculturae Sinica, 2017, 26(3): 65-74.

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