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Acta Prataculturae Sinica ›› 2023, Vol. 32 ›› Issue (12): 58-67.DOI: 10.11686/cyxb2023034

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Effects of different livestock assembly on the productivity of yak and Tibetan sheep in warm-season pastures

Bin FENG(), Xiao-xia YANG, Wen-ting LIU, Yu-zhen LIU, Wei-dong LV, Zhen-xiang ZHANG, Cai-cai SUN, Qin-yuan ZHOU, Fang-cao WANG, Ze-hang YU, Quan-min DONG()   

  1. Qinghai Academy of Animal Science and Veterinary Medicine,Qinghai University,Qinghai Academy of Animal and Veterinary Science,Qinghai Provincial Key Laboratory of Adaptive Management on Alpine Grassland,Key Laboratory of Alpine Grassland Ecosystem in the Three-River-Source,Qinghai University,Ministry of Education,Xining 810016,China
  • Received:2023-02-01 Revised:2023-03-13 Online:2023-12-20 Published:2023-10-18
  • Contact: Quan-min DONG

Abstract:

This research explored the effect of different livestock assembly on livestock productivity under moderate grazing intensity. Five experimental grazing treatments were established: Yak only grazing (YG), Tibetan sheep only grazing (SG), yak and Tibetan sheep grazing mixed 1∶6 (MG1∶6), yak and Tibetan sheep grazing mixed 1∶4 (MG1∶4), yak and Tibetan sheep grazing mixed 1∶2 (MG1∶2). We studied the daily weight gain of yaks and Tibetan sheep at different stages in the herbage growing season and the effects of different livestock assembly on the nutrition, feed intake, and weight gain of yaks and Tibetan sheep in the warm season. It was found that: 1)The daily weight gain of yaks and Tibetan sheep in the pasture re-greening and growing periods was significantly greater than that in the browning-off period (P<0.05). 2)There was no significant difference in daily gain of yak and Tibetan sheep under the different livestock assembly (P>0.05), but the weight gain of yaks in the warm season was highest in YG, and was also relatively high in the treatments MG1∶2 and MG1∶6. The weight gain of Tibetan sheep in the warm season was the highest in MG1∶2, and relatively high in SG and MG1∶4 treatments. 3)There was no significant difference in nutrition and feed intake per unit area of livestock under the different livestock assembly (P>0.05). When grazing a single livestock class, the weight gain per unit area of SG was the highest, and under mixed grazing of yaks and Tibetan sheep, the weight gain per unit area of MG1∶2 was the highest. In conclusion, supplementary feeding of yaks and Tibetan sheep during the browning-off period of the season is of great significance for maintaining livestock productivity, and the livestock assembly of MG1∶2 was the optimum ratio for mixed grazing of yaks and Tibetan sheep.

Key words: moderate grazing, different livestock assembly, livestock productivity, yak, Tibetan sheep, warm season grazing, warm season weight gain, daily weight gain