Dynamic changes of grazing sheep body gains and ruminal fermentation parameters on sandy recovering grassland

Abstract

Abstract: A sheep grazing experiment was carried out at the Inner Mongolian, Zhenglan banner, Hunshandake sandy recovering grassland in the warm season to determine body weight gains and ruminal fermentation parameters under rotational grazing and continuous grazing. Sheep body weight gains were evident at 4 months, and averaged 2.46, 5.08, 5.52, and 2.29 kg/month, respectively in the three experimental groups. There was no obvious difference between sheep weight under continuous grazing and rotational grazing. Sheep had high rumen fermentation levels from July to August, from fasting to intake after 7 h the rumen pH, NH₃-N concentration and TVFA (total volatility fatty acid) concentration range were changed as 7.01－6.38－6.47－6.77, 6.02－9.26－10.75－10.82 mg/100 mL and 31.37－42.99－58.55－65.28 mmol/L, respectively. Therefore, sheep can produce higher body gains and better rumen fermentation when grazed on sandy recovering grassland after a 5-6 year fenced recovery period.

CLC Number:

S812.8
S826

Ta-na, GUI Rong, WEI Ri-hua, ZHAO Shan-zhi. Dynamic changes of grazing sheep body gains and ruminal fermentation parameters on sandy recovering grassland[J]. Acta Prataculturae Sinica, 2010, 19(5): 45-50.

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