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[1]JIA Zhao,JIAN Chunxia,XIONG Peifeng,et al.Relationship Between Community Coverage and Aboveground Biomass in Farming-Withdrawn Grasslands in Loess Hilly-Gully Region[J].Research of Soil and Water Conservation,2020,27(01):319-327.

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Relationship Between Community Coverage and Aboveground Biomass in Farming-Withdrawn Grasslands in Loess Hilly-Gully Region

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 27 Number of periods: 2020 01 Page number: 319-327 Column: Public date: 2020-02-20

Title:: Relationship Between Community Coverage and Aboveground Biomass in Farming-Withdrawn Grasslands in Loess Hilly-Gully Region

Author(s):: JIA Zhao¹, JIAN Chunxia¹, XIONG Peifeng¹, CHEN Zhifei¹, ZHOU Junjie¹, YANG Quan², XU Bingcheng^1,2; (1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi 712100, China; 2.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China)

Keywords:: farming-withdrawn grassland; vegetation coverage; vegetation composition; aboveground biomass

CLC:: Q149

DOI:: -

Abstract:: It is of great significance to systematically evaluate the restoration potential of grassland by revealing the relationship between coverage and aboveground biomass of different farming-withdrawn grasslands in loess hilly-gully region. We selected five grassland communities with different withdrawn years(5-year, 10-year, 15-year, 20-year, 30-year)and three methods including photographic method, community survey and harvest methods were employed to obtain their coverage, species composition and biomass. The result showed that community average height had significantly positive correlation with coverage and aboveground biomass, while there is a significant negative correlation between species richness and Shannon-Wiener diversity index; Vegetation coverage and aboveground biomass increased with abandoned years, while species richness and Shannon diversity index showed no significant differences among communities; the plant density, community height and aboveground biomass per unit coverage were the lowest in the 20-year abandoned farmland, and vegetation coverage and aboveground biomass were significantly lower than those of 15-year abandoned farmland; the dominant species for different farming-withdrawn grassland communities were: Setaria viridis and Lespedeza davurica for the 5-year, L. davurica and Artemisia gmelinii for 10-year and 15-year, A. gmelinii and Potentilla tanacetifolia for 20-year and Stipa bungeana for 30-year; there was a significant positive linear correlation between vegetation coverage and aboveground biomass, when vegetation coverage was less than 84.6%, and when the vegetation coverage was greater than 84.6%, the community coverage did not change with the increase of aboveground biomass. The values of vegetation coverage(84.6%)and aboveground biomass(285.17 g/m²)can be used as important references for vegetation restoration evaluation and control measure selection in loess hilly-gully region.

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Last Update: 2020-02-25