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African Journal of Biotechnology

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Optimum stocking rate for goat production on improved highland pastures in South-western China

Zhu Xiao-yan, Chang Shu-juan, Zhang Ying-jun, Luo Hai-ling

Abstract


The effects of four stocking rates (SR; 7.5, 15, 30 and 45 goats ha-1) on goat performance and herbage productivity were examined on the perennial pastures. The experiment was applied by grazing 65 six-months old Chinese Yunling black goat wethers for two years. Significant year × SR interactions were observed on standing crop (SC). A linear negative correlation was found for average daily gain (ADG) and SR, and a linear positive correlation for ADG and SC was found. SR had a significant quadratic relationship to gain per hectare (GH), but a significant linear negative relationship to SC. The SR at which GH was optimal ranged from 29.1 to 34.3 goats ha-1, with corresponding levels of SC in the range of 138.9 to 150.1 g DM m-2 and utilization rate of pasture ranged from 63.1 to 74.3%. The study therefore provided a sustainable utilization approach for sown pastures in south-west China.

Key words: Black goat, grazing intensity, average daily gain, gain per hectare, South-west China.




http://dx.doi.org/10.5897/AJB12.843
AJOL African Journals Online