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《Grass-feeding livestock》 2003-03
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Study on cotton stalk for sheep as roughage

WEI Min, LUO Qiu - Jiang, WANG Dong-bao, ZHU Wen - tao, PAN Ji - xiu (Laboratory of Animal Nutrition, Xin Jiang Agricultural University, Urumqi, 830052,China; Dong Sheep Farm of Regiment 129, The 7th of Agricultural Division,Kuitun 833200,China)  
To evaluate the nutritive value of the cotton stalk, the dry matter intake (DMI) and the nutrient digestibility of the cotton stalk were determined in this experiment. 18 crossing mature wethers (Romney x Chinese Merino) with average body weight of 38.6 kg were divided into 3 groups. Supplemented with 350g of concentrate for each group, the sheep in the group 1 and group 2 were fed limited and ad libitum by the cotton stalk respectively, and the sheep in the group 3 was designed to eat the corn silage ad libitum. The results showed that the cotton stalk could be eaten and utilized by sheep as roughage. The DMI of the cotton stalk was 693g/d /sheep, and the digestibility of DM, OM, CP, cellulose and semi - cellulose in the cotton stalk were 34.6% , 39. 7% , 43.0% , 5% and 65.8% respectively. The lower digestibility of cellulose was one of the problems constraining the utilization of cotton stalk for animal and needed to be studied further. According to the proximate calculation, the sheep would increase live - body weight by 1 kg if 4. 3 kg of cotton stalk consumed in this experimental condition. Therefore, it is worthy of considering that the cotton stalk can be used for ruminants by a larger scale in the practical production.
【CateGory Index】: S826
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