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Comparison of Nutrition Values of Dry Corn Gluten Feed and Commonly Used Roughages 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: 2015-10-04

  Online published: 2016-03-14

Abstract

The aim of this study was to compare the nutrition values of dry corn gluten feed (DCGF) and commonly used roughages for dairy cattle (alfalfa hay, corn silage and wildrye) using Cornell net carbohydrate-protein system (CNCPS) and National Research Council (NRC) models, and to analyze the feasibility of DCGF as fiber source for dairy cattle. Feed samples were collected from different farms and then nutrient composition was determined. The protein and carbohydrate fractions were partitioned using CNCPS. At the same time, NRC models were used to predict the digestible nutrient contents and energy values of four kinds of feedstuffs. The results showed as follows: 1) the content of crude protein (CP) of DCGF was significantly higher than those of corn silage and wildrye (P<0.05), and the content of neutral detergent fiber (NDF) was significantly higher than that of alfalfa hay (P<0.05), however, the contents of acid detergent fiber (ADF) and acid detergent lignin (ADL) of DCGF were significantly lower than those of other three kinds of roughages (P<0.05). 2) The contents of rapidly degraded true protein (PB1) and intermediately degraded true protein (PB2) factions of DCGF were significantly lower than those of alfalfa hay (P<0.05), and the contents of intermediately degraded carbohydrate (CB1) and slowly degraded carbohydrate (CB2) of DCGF were significantly higher than those of other roughages (P<0.05). 3) The content of metabolizable protein (MP) of alfalfa hay was the highest, and DCGF was at second. 4) Compared with other three kinds of roughages, the truly digestible nutrients at maintenance level and energy values for DCGF were the highest. The results indicate that DCGF has relatively high nutrition values and can be used in dairy cattle diet as fiber feed instead of parts of roughages to relieve the pressure of high quality roughage and protein feeds shortage.

Cite this article

HAO Xiaoyan, GAO Hong, ZHANG Xingyi, WANG Xiaofan, DING Xue, ZHANG Yonggen . Comparison of Nutrition Values of Dry Corn Gluten Feed and Commonly Used Roughages using Cornell Net Carbohydrate-Protein System and National Research Council Models[J]. Chinese Journal of Animal Nutrition, 2016 , 28(3) : 842 -850 . DOI: 10.3969/j.issn.1006-267x.2016.03.025

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