Evaluation of Nutrition Values of Fermentation Total Mixed Ration Using Cornell Net Carbohydrate-Protein System and National Research Council Models

ZHANG Guangning, LIU Xin, YAO Enyue, ZHANG Yonggen

doi:10.3969/j.issn.1006-267x.2019.02.050

2019 , Vol. 31 >Issue 2: 930 - 939

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.02.050

Molecular Nutrition

Evaluation of Nutrition Values of Fermentation Total Mixed Ration Using Cornell Net Carbohydrate-Protein System and National Research Council Models

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College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China

Received date: 2018-07-09

Online published: 2019-02-18

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Abstract

This experiment used fermentation technology to wrap fresh total mixed ration (TMR) into fermentation total mixed ration (FTMR). Samples were collected after 0, 3, 7, 15 and 30 days after storage to determine 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 nutrient 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 significant (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 degradation 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 carbohydrates 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 storage time (P<0.05). 4) The FTMR at 0, 3, 7 and 15 d could supply effectively maintain total digestible nutrients 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.

Key words： fermented total mixed ration; CNCPS; NRC; nutrition value; energy value

Cite this article

ZHANG Guangning, LIU Xin, YAO Enyue, ZHANG Yonggen . Evaluation of Nutrition Values of Fermentation Total Mixed Ration Using Cornell Net Carbohydrate-Protein System and National Research Council Models[J]. Chinese Journal of Animal Nutrition, 2019 , 31(2) : 930 -939 . DOI: 10.3969/j.issn.1006-267x.2019.02.050

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