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首页> 美国卫生研究院文献>Asian-Australasian Journal of Animal Sciences >Effects of Bedding Material Composition in Deep Litter Systems on Bedding Characteristics and Growth Performance of Limousin Calves
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Effects of Bedding Material Composition in Deep Litter Systems on Bedding Characteristics and Growth Performance of Limousin Calves

机译：深凋落物系统中垫料组成对利木赞犊牛垫料特性和生长性能的影响

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The objective of this study was to evaluate the effects of different litter mixture compositions on bedding system temperature, pH and volatile fatty acid and ammonia-N (NH3-N) content, and the serum physico-chemical parameters and growth indices of calves. Thirty-two Limousin calves (280±20 kg) were randomly assigned to four groups (n = 8 for each group) according to the bedding system used: i) control with soil only (CTR); ii) mixture with 50% paddy hulls (PH), 30% saw dusts (SD), 10% peat moss (PM) and 10% corn cobs (CC) (TRT1); iii) mixture with 15% PH, 15% SD, 10% PM, 40% CC, and 20% corn stover (CS) (TRT2); iv) mixture with 30% PH, 10% PM, 40% CC, and 20% CS (TRT3). The litter material combinations of different treatments were based on the cost of bedding system materials in China. The cost of four treatments from low to high: Control<TRT1<TRT2<TRT3. The control was no-cost treatment. The diet consisted of 60.8% silage and 39.2% concentrate (dry matter [DM] basis). The NH3-N level (271.83 to 894.72 mg/kg) was lowest for TRT1 (p<0.0001) and highest for TRT2 (p<0.0001). The acetate, propionate and butyrate levels were highest for the control group (p<0.0001). In all the groups, the pH value (6.90 to 9.09) increased at the beginning and later remained stable at below 9.09. The temperature of deep litter increased at the first week and reached the maximum (42.1°C) on day 38. 3,5,3′-Triiodothyronine (T3) levels in the TRT1 group animals (p<0.0001) were lower than those in the control and TRT2 animals. 3,5,3′,5′-Tetraiodothyronine (T4) in the TRT1 group (p = 0.006) was lower than that in the other treatment groups. Cortisol (COR) in the control and TRT1 group was lower (p<0.0001) than that in the TRT2 and TRT3 groups. Corticosterone (CORt) in the control group was higher (p<0.0001) than that in the treatment groups. The findings indicate that the deep litter bedding systems provided better conditions for animal health and growth performance compared with the control system. Furthermore, the litter composition of TRT1 was found to be optimal among the three treatment groups.
机译：这项研究的目的是评估不同垫料混合物组成对垫料系统温度，pH和挥发性脂肪酸以及氨氮（NH3-N）含量以及血清理化参数和犊牛生长指数的影响。根据所使用的铺垫系统，将32头利木赞犊牛（280±20 kg）随机分为四组（每组n = 8）：i）仅土壤对照（CTR）； ii）与50％稻壳（PH），30％锯末（SD），10％泥炭藓（PM）和10％玉米芯（CC）（TRT1）的混合物； iii）具有15％PH，15％SD，10％PM，40％CC和20％玉米秸秆（CS）（TRT2）的混合物; iv）与30％PH，10％PM，40％CC和20％CS（TRT3）的混合物。不同处理方式的垫料组合是基于中国垫层系统材料的成本。从低到高的四种处理成本：对照

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