短花针茅草原主要植物种群与土壤养分对季节调控放牧的响应

doi:10.12160/j.issn.1672-5190.2020.01.012

Abstract

Abstract: In this study, four experimental treatment areas were set up to assess the changing characteristics in plant nutrients and soil nutrients of different layers using Stipa breviflora desert steppe as the research object. The results showed that the height of Stipa breviflora in light-grazing area SA1, moderate-grazing area SA5 and zero-grazing area CK was significantly (P<0.05) higher than that in over-grazing area SA3. The height of plant population in SA1 area was the highest. The plant with the greatest influence on coverage of plant population was Allium polyrhizum, and significant (P<0.05) difference between the grazing areas and CK was observed. SA1 area had the lowest total nitrogen content of plant community, and the lowest carbon content of plant community was also observed in SA1 area followed by CK. The order of N/P value was SA5>SA3>CK>SA1. Grazing reduced the content of fast phosphorus in the soil and increased the organic carbon in the surface soil.

Key words: desert steppe, grazing, plant population, soil nutrients

CLC Number:

S812.8

LIU Jia, WEI Zhi-jun, ZHANG Shuang, QUE Guo-ping, LI Ze. Responses of Main Plant Populations and Soil Nutrients in Stipa breviflora Steppe to Seasonally Regulated Grazing[J]. Animal Husbandry and Feed Science, 2020, 41(1): 66-72.

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Responses of Main Plant Populations and Soil Nutrients in Stipa breviflora Steppe to Seasonally Regulated Grazing

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