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[1]YANG Guangneng,ZHANG Xi,XUE Jianhui,et al.Changes in Land Use and Ecological Benefits in Different Small Watersheds with Dolomite Rock Desertification in Central Guizhou Province[J].Research of Soil and Water Conservation,2022,29(06):214-223.

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Changes in Land Use and Ecological Benefits in Different Small Watersheds with Dolomite Rock Desertification in Central Guizhou Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 06 Page number: 214-223 Column: Public date: 2022-10-20

Title:: Changes in Land Use and Ecological Benefits in Different Small Watersheds with Dolomite Rock Desertification in Central Guizhou Province

Author(s):: YANG Guangneng¹, ZHANG Xi¹, XUE Jianhui², WU Yongbo², HOU Yiju¹, CUI Yingchun¹, SHU Deyuan¹; (1.Guizhou Provincial Academy of Forestry, Guiyang 550005, China; 2.Nanjing Forestry University, Nanjing 210037, China)

Keywords:: calcareous dolomite desert; gravelly dolomite desert; land use area structure; forest and grass restoration mode; vegetation coverage rate; soil erosion modulus; area ratio of rocky desertification grade

CLC:: P642.25; S718.56; F301.24

DOI:: -

Abstract:: To analyse the governance effect of the vegetation restoration mode of the comprehensive treatment project in various calcareous dolomite deserts and gravelly dolomite deserts, the changes in the ecological benefits of different forest and grass restoration modes in small watersheds with dolomite rocky desertification in central Guizhou Province were analysed using a method integrating scientific research, engineering management, remote-sensing imagery, and field investigations. The results showed that:(1)The Puding research area(PDRA)belongs to a calcareous dolomite rocky desertification area, and the Kaili research area(KLRA)belongs to a gravelly dolomite rocky desertification area. The landscape matrix similarity of the agriculture and forests in PDRA and KLRA is high, and the rocky desertification trend in PDRA was strong in 2016.(2)From 2016 to 2020, in both PDRA and KLRA, the input amount was higher than that of the output in forestland, while the relative value was to the contrary in farmland. Additionally, the vegetation coverage rate increased and the soil erosion modulus and the rate of development of the rocky desertification grade areas decreased. The ecological benefit of the comprehensive control in PDRA was remarkable.(3)It was observed that as the vegetation coverage increases, the soil erosion modulus decreases, and the rocky desertification grade area decreases most in the ecological restoration model and least in the grassland animal husbandry model. The ecological benefits of the ecological restoration model and the closed forest model in PDRA are higher than those in KLRA. In general, after comprehensive treatment in similar small watersheds with rocky desertification, it was observed that the vegetation coverage rate increased and the soil erosion modulus and the rate of development of the rocky desertification grade areas decreased. The governance effect of rocky desertification was observed most in the ecological restoration model and least in the grassland animal husbandry model, ergo, the governance effect of calcareous dolomite desert was better than that of gravelly dolomite desert.

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Last Update: 2022-10-20