草业学报2025，Vol.34Issue(9)：1-11,11.DOI:10.11686/cyxb2024428
黄土高原丘陵沟壑区退耕恢复草地植物空间分布格局研究
Species spatial distribution patterns in grassland under restoration in'hill and gully'regions of the Loess Plateau
摘要
Abstract
The aim of this work was to explore the spatial distribution pattern of plants in grasslands under natural restoration on the Loess Plateau.To this end,a field study was conducted at three grassland sites that had been under natural restoration for 5,10,and 25 years in Wuqi County,Shaanxi Province.The spatial heterogeneity indexes of the whole community and each species in the community were calculated using the aboveground biomass measurement method and the point-grid coverage measurement method,the data were analyzed using two mathematical analytical models:γ-distribution and β-distribution models.Using these analyses,we were able to determine the role of each plant species in the spatial distribution pattern.The results show that the spatial heterogeneity index of grassland species decreased significantly with the increase in average aboveground biomass and coverage(P<0.01);the proportion of aboveground biomass and coverage of grasses were higher in the 10-year grassland than in the 5-year grassland.Among all the plant species,Stipa capillata accounted for 23.0%and 37.6%of the total biomass and coverage in the 10-year grassland,respectively.In the 25-year grassland,the degradation indicator plant species,Potentilla freyniana,was the dominant species in the community.This result indicates that a long fallow period is not conducive to maintaining the aboveground biomass and cover ratio of grasses and other high-quality plants in the community.The most dominant plant species reduced the spatial heterogeneity of the community as a whole,while the least dominant species had very little effect on the spatial distribution pattern of the community.Overall,the results of this study provide objective data to guide scientific management and rational use of grassland during restoration.关键词
黄土高原丘陵沟壑区/退耕恢复草地/地上生物量/盖度/γ分布模型/β分布模型/空间异质性Key words
Loess Plateau hilly and gully area/fallow restoration grassland/aboveground biomass/coverage/γ-distribution model/β-distribution model/spatial heterogeneity引用本文复制引用
孔繁晰,唐邦洁,阿力米日·阿力木江,阿的各各,袁茂国,陈俊..黄土高原丘陵沟壑区退耕恢复草地植物空间分布格局研究[J].草业学报,2025,34(9):1-11,11.基金项目
陕西省重点研发计划一般项目(2021NY-012)资助. （2021NY-012）
