摘要
The objective of this study was to investigate the effect of carbohydrate source and cottonseed meal level in the concentrate on feed intake, nutrient digestibility, rumen fermentation and microbial protein synthesis in swamp buffaloes. Four, 4-yr old rumen fistulated swamp buffaloes were randomly assigned to receive four dietary treatments according to a factorial arrangement in a Latin square design. Factor A was carbohydrate source; cassava chip (CC) and CC+rice bran at a ratio 3:1 (CR3:1), and factor B was level of cottonseed meal (CM); 109 g CP/kg (LCM) and 328 g CP/kg (HCM) in isonitrogenous diets (490 g CP/kg). Buffaloes received urea-treated rice straw ad libitum and supplemented with 5 g concentrate/kg BW. It was found that carbohydrate source did not affect feed intake, nutrient intake, digested nutrients, nutrient digestibility, ammonia nitrogen concentration, fungi and bacterial populations, or microbial protein synthesis (p>0.05). Ruminal pH at 6 h after feeding and the population of protozoa at 4 h after feeding were higher when buffalo were fed with CC than in the CR3:1 treatment (p<0.05). Buffalo fed with HCM had a lower roughage intake, nutrient intake, population of total viable and cellulolytic bacteria and microbial nitrogen supply than the LCM fed group (p<0.05). However, nutrient digestibility, ruminal pH, ammonia concentration, population of protozoa and fungi, and efficiency of microbial protein synthesis were not affected by cottonseed meal levels (p>0.05). Based on this experiment, concentrate with a low level of cottonseed meal could be fed with cassava chips as an energy source in swamp buffalo receiving rice straw.
摘要译文
本研究的目的是研究浓缩物中碳水化合物来源和棉籽粕水平对采食量，营养物质消化率的影响，沼泽水牛的瘤胃发酵和微生物蛋白质合成。四，根据拉丁方设计中的因子排列，将4岁的瘤胃瘘管沼泽水牛随机分配接受四种饮食治疗。因子A是碳水化合物来源;木薯片（CC）和CC +米糠比例为3：1（CR3：1），B因子为棉籽粕（CM）;异构饮食中的109g CP / kg（LCM）和328g CP / kg（HCM）（490g CP / kg）。水牛随意接受尿素处理的稻草，并补充5g浓缩物/ kg BW。结果发现，碳水化合物来源不影响采食量，营养摄入，消化营养素，营养物质消化率，氨氮浓度，真菌和细菌种群，或微生物蛋白质合成（p 0.05）。饲喂后6小时的瘤胃pH值和喂食后4小时的原生动物种群在喂食CC的水牛比在CR3：1处理时更高（p 0.05）。与LCM饲喂组相比，用HCM饲喂的水牛具有较低的粗饲料摄入量，营养摄入量，总活菌数和纤维素分解细菌数量以及微生物氮供应量（p 0.05）。然而，营养物质消化率，瘤胃pH，氨浓度，原生动物和真菌种群以及微生物蛋白质合成效率不受棉籽粕水平的影响（p 0.05）。基于这个实验，低水平的棉籽粕浓缩物可以用木薯片作为接收稻草的沼泽水牛的能量来源。
Wanapat, Metha; Pilajun, R.; Polyorach, S.; Cherdthong, A.; Khejornsart, P.; Rowlinson, P.;. Effect of Carbohydrate Source and Cottonseed Meal Level in the Concentrate on Feed Intake, Nutrient Digestibility, Rumen Fermentation and Microbial Protein Synthesis in Swamp Buffaloes[J]. Asian-Australasian Journal of Animal Sciences, 2013,26(7): 952-960