CAJ | 학술논문

本试验旨在应用康奈尔净碳水化合物-蛋白质体系（ CNCPS）和NRC模型评价不同干酒糟及其可溶物（ DDGS）的营养价值。采集我国5个不同生产厂家的玉米DDGS和2个不同生产厂家的大麦DDGS作为样本，测定营养成分，利用CNCPS对蛋白质和碳水化合物组分进行剖分，并根据NRC模型估测可消化养分含量和能值。结果表明：1）玉米DDGS中粗蛋白质（ CP）、中性洗涤不溶性粗蛋白质（ NDICP）和酸性洗涤不溶性粗蛋白质（ ADICP）含量的平均值均高于大麦DDGS，但是玉米DDGS中可溶性粗蛋白质（ SCP）、中性洗涤纤维（ NDF）和酸性洗涤木质素（ADL）的含量的平均值均低于大麦DDGS。2）玉米DDGS中速降解真蛋白质（PB2）、不可降解氮（ PC）和不可利用碳水化合物（ CC）含量的平均值均高于大麦DDGS。3）与大麦DDGS相比，玉米DDGS中瘤胃真可消化粗蛋白质（ tdCP）和维持水平总可消化养分（ TDNm ）含量的平均值略高，生产水平消化能（ DEp ）、生产水平代谢能（ MEp ）、生产水平泌乳净能（ NELp ）、维持净能（ NE m ）的平均值接近。结果提示，我国的玉米DDGS和大麦DDGS可以作为奶牛饲料，缓解我国蛋白质饲料紧张和价格高涨带来的影响。
본시험지재응용강내이정탄수화합물-단백질체계（ CNCPS）화NRC모형평개불동간주조급기가용물（ DDGS）적영양개치。채집아국5개불동생산엄가적옥미DDGS화2개불동생산엄가적대맥DDGS작위양본，측정영양성분，이용CNCPS대단백질화탄수화합물조분진행부분，병근거NRC모형고측가소화양분함량화능치。결과표명：1）옥미DDGS중조단백질（ CP）、중성세조불용성조단백질（ NDICP）화산성세조불용성조단백질（ ADICP）함량적평균치균고우대맥DDGS，단시옥미DDGS중가용성조단백질（ SCP）、중성세조섬유（ NDF）화산성세조목질소（ADL）적함량적평균치균저우대맥DDGS。2）옥미DDGS중속강해진단백질（PB2）、불가강해담（ PC）화불가이용탄수화합물（ CC）함량적평균치균고우대맥DDGS。3）여대맥DDGS상비，옥미DDGS중류위진가소화조단백질（ tdCP）화유지수평총가소화양분（ TDNm ）함량적평균치략고，생산수평소화능（ DEp ）、생산수평대사능（ MEp ）、생산수평비유정능（ NELp ）、유지정능（ NE m ）적평균치접근。결과제시，아국적옥미DDGS화대맥DDGS가이작위내우사료，완해아국단백질사료긴장화개격고창대래적영향。
This study was conducted to evaluate the nutrition values of different dried distillers grains with solu-bles ( DDGSs) using Cornell Net Carbohydrate and Protein System ( CNCPS) and National Research Council ( NRC) models.Corn DDGSs from five manufactures and barley DDGSs from two manufactures in China were selected as samples to determine nutrient composition, and then the protein and carbohydrate subfractions were partitioned using CNCPS.Finally, the digestible nutrient contents and energy values were predicted using NRC models.The results showed as follows:1) the average contents of crude protein (CP), neutral detergent insoluble crude protein ( NDICP) and acid detergent insoluble crude protein ( ADICP) in corn DDGSs were all higher than those in barley DDGS, while the average contents of soluble crude protein ( SCP) , neutral deter-gent fiber ( NDF) and acid detergent lignin ( ADL) were lower than those in barley DDGSs.2) The average contents of intermediately degraded true protein ( PB2 ) , undegradable nitrogen ( PC) and unavailable carbohy-drate ( CC) in corn DDGSs were higher than those in barley DDGSs.3 ) Compared with barley DDGSs, the average contents of truly digestible crude protein ( tdCP ) and total digestible nutrients at maintenance level ( TDNm ) in corn DDGSs were a little higher, while the digestible energy at production level ( DEp ) , metabo-lizable energy at production level (MEp), net energy for lactation at production level (NELp) and net energy for maintenance ( NEm ) were close in corn and barley DDGSs.The results indicate that corn DDGSs and bare-ly DDGSs in China can be used as dairy feeds to relieve the effects of protein feeds shortage and price increase.