CAJ | 학술논문

饲料养分的绝大部分是碳水化合物和蛋白质，其营养价值的准确评定及其在瘤胃内代谢规律的精细化研究对发展反刍动物的精细饲养具有重要意义，目前在国际上受到广泛关注和应用的美国康奈尔净碳水化合物和蛋白质体系（ Cornell Net Carbohydrate and Protein System， CNCPS）是一种反刍动物饲料营养价值评定的重要方法，但在国内实际生产中尚未广泛应用。本文系统地概述了CNCPS中碳水化合物和蛋白质各组分的划分及其变化，并通过列举常用饲料各组分的含量和变化范围及计算公式等，全面揭示了不同类型饲料中碳水化合物及蛋白质组分的含量特性及其差异的原因，以及瘤胃降解速率（ Kd）及食糜流通速率（ Kp）的变化规律；同时比较了CNCPS与传统饲料养分划分体系的联系与区别。
사료양분적절대부분시탄수화합물화단백질，기영양개치적준학평정급기재류위내대사규률적정세화연구대발전반추동물적정세사양구유중요의의，목전재국제상수도엄범관주화응용적미국강내이정탄수화합물화단백질체계（ Cornell Net Carbohydrate and Protein System， CNCPS）시일충반추동물사료영양개치평정적중요방법，단재국내실제생산중상미엄범응용。본문계통지개술료CNCPS중탄수화합물화단백질각조분적화분급기변화，병통과열거상용사료각조분적함량화변화범위급계산공식등，전면게시료불동류형사료중탄수화합물급단백질조분적함량특성급기차이적원인，이급류위강해속솔（ Kd）급식미류통속솔（ Kp）적변화규률；동시비교료CNCPS여전통사료양분화분체계적련계여구별。
Carbohydrate and protein account for the most of feed nutrients, and accurate assessment of their nu-tritional values and ruminal metabolism become more and more significant.Cornell Net Carbohydrate and Pro-tein System( CNCPS) as an important method to evaluate feeds nutritional values, has not been widely used in ruminant production in China.This paper systematically reviewed the division of carbohydrate and protein frac-tions in CNCPS and their changes, as well as revealed ht e diversity of carbohydrate and protein fractions in dif-ferent feedstuffs and variation of rumen degradation rate (Kd) and passage rate (Kp).The relationship and difference between CNCPS system andother assessment systems were also reviewed.