动物营养学报2019，Vol.31Issue(2)：930-939,10.DOI:10.3969/j.issn.1006-267x.2019.02.050
应用康奈尔净碳水化合物-蛋白质体系和 NRC模型评价发酵全混合日粮的营养价值
Evaluation of Nutrition Values of Fermentation Total Mixed Ration Using Cornell Net Carbohydrate-Protein System and National Research Council Models
摘要
Abstract
This experiment used fermentation technology to wrap fresh total mixed ration ( TMR) into fermen-tation total mixed ration ( FTMR) . Samples were collected after 0, 3, 7, 15 and 30 days after storage to deter-mine the nutrient values. The partition of protein and carbohydrate of FTMR was estimated using Cornell net carbohydrate and protein system ( CNCPS) model, and predicted potential nutrient supply. The digestible nutri-ent contents and energy values were predicted using NRC (2001) models. The results showed as follows: 1) the dry matter content of FTMR significantly decreased with the prolongation of storage time ( P<0.05) , and the content of dry matter tended to be stable after 7 days. The difference of crude protein content was not signif-icant ( P>0.05) . The contents of soluble protein, non-protein nitrogen, neutral detergent fiber, acid detergent lignin, crude fat and ash increased significantly with the prolongation of storage time ( P<0.05) . The contents of neutral washing insoluble protein, acid washing insoluble protein and starch decreased significantly with the prolongation of storage time (P<0.05). 2) The contents of non-protein nitrogen and fast degradation of true proteins increased significantly with the prolongation of storage time ( P<0.05) . The contents of moderate deg-radation of true protein, slow degradation of true protein and non-degradable proteins decreased significantly with the prolongation of storage time ( P<0.05) . The contents of carbohydrate, moderate degradation of carbo-hydrates and slowly degrade carbohydrates decreased significantly with the prolongation of storage time ( P<0.05) . 3) The contents of rumen degradable protein increased significantly with the prolongation of storage time ( P<0.05) . The rumen energy-nitrogen balance value decreased significantly with the prolongation of stor-age time ( P<0.05) . 4) The FTMR at 0, 3, 7 and 15 d could supply effectively maintain total digestible nutri-ents and net energy. Thus, FTMR of 15 days can effectively maintain feed nutrients and provide more nitrogen source and energy for the growth of rumen microorganisms. It is beneficial to improve feed utilization rate. [ Chinese Journal of Animal Nutrition, 2019, 31(2) :930-939]关键词
发酵全混合日粮/康奈尔净碳水化合物-蛋白质体系/NRC/营养价值/能值Key words
fermented total mixed ration/CNCPS/NRC/nutrition value/energy value分类
农业科技引用本文复制引用
张广宁,刘鑫,么恩悦,张永根..应用康奈尔净碳水化合物-蛋白质体系和 NRC模型评价发酵全混合日粮的营养价值[J].动物营养学报,2019,31(2):930-939,10.基金项目
现代农业(奶牛)产业技术体系建设专项资金资助(CARS-36) （奶牛）
