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- W301380714 abstract "Overgrazing is the main reason for grassland degradation and reasonable grazing intensity is basic to the sustainable using of grassland.In this study,the primary productivity,soil nutritional contents,and live weight gain per yak were measured under different grazing intensities in warm-season pastures of alpine Kobresia parva(Nees) Wang et Tang ex Y.C.Yang meadow and Elymus nutans Griseb./Puccinellia tenuiflora(Griseb.) Scribn.et Merr.mixed-sown grassland.The results show: 1.Linear relationship was detected between live weight gain per yark and grazing intensity;the optimal grazing intensity in warm season for alpine K.parva meadow was 1.26 head·hm-2 and for E.nutans/P.tenuflora mixed-sown grassland was 7.23 head·hm-2.2.The influence of grazing intensity on the available K in alpine mixed-sown grassland was significant(P0.05),but not significant to available N and P.Along with the increase of grazing intensity,contents of organic matter,organic carbon,total N and total P in alpine K.parva meadow reduced,and contents of available N in 0～5 cm,5～10 cm,and 10～20 cm depth were minimum when grazing intensity was 1.07,1.08,and 1.22 head·hm-2,respectively.3.With the increased grazing intensity,the ratio of grasses sedges in biomass reduced and palatable and toxic weeds increased in alpine K.parva meadow,while the percentage of E.nutans in biomass decreased and P.tenuflora and others increased in alpine mixed-sown grassland." @default.
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- W301380714 date "2009-01-01" @default.
- W301380714 modified "2023-09-27" @default.
- W301380714 title "Study on Grazing Yak Performance and Soil Nutrient Changes in Warm-season Pastures of Alpine Region" @default.
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