EffectsoffencingonvegetationcommunitycharacteristicsandsoilpropertiesofatypicalsteppeinInnerMongolia

doi:10.11686/cyxb2015334

Abstract

Abstract: Fencing is one of the important means of restoration and reconstruction of degraded grassland, and has been widely used in grassland ecological restoration programs in China. This study monitored fenced and free-grazed grassland plots, to evaluate the impacts of fencing on community plant species composition, composition of functional groups, species diversity, aboveground biomass, soil organic carbon (C) and total nitrogen (N) contents of degraded grassland. The plant species number in fenced plots (22 species) was greater than that in free-grazed plots (17 species). Community diversity (H), richness (Pa), evenness (JP) indices and aboveground biomass did not differ significantly between fenced and free-grazed plots (P>0.05). Importance value (IV), percentage, aboveground biomass,H,Pa and JP indices of shrubs, semi-shrubs (SS) and perennial forbs (PF) in fenced plots were higher than those in free-grazed plots (P<0.05). Aboveground biomass of perennial grasses (PG) was higher in fenced plots than in free-grazed plots (P<0.05). Importance value (IV), percentage, aboveground biomass,H,Pa and JP indices of annual or biennial herbs (AB) were lower in fenced plots than in free-grazed plots (P<0.05). The percentage and aboveground biomass of ecological functional groups did not differ significantly between fenced plots and free-grazed plots (P>0.05). Soil organic C and total N content were not significantly different between fenced plots and free-grazed plots (P>0.05). The soil organic C and total N contents decreased significantly (P<0.05) with increasing soil depth, but the rate of decrease with depth was less in fenced plots than in free-grazed plots.

YANG Yong, LIU Ai-Jun, LI Lan-Hua, CHEN Hai-Jun, SONG Xiang-Yang, WANG Bao-Lin, LUO Dong, WANG Ming-Jiu. EffectsoffencingonvegetationcommunitycharacteristicsandsoilpropertiesofatypicalsteppeinInnerMongolia[J]. Acta Prataculturae Sinica, 2016, 25(5): 21-29.

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