Effects of Different Processing Methods on Nutritional Value of Degreasing Camphor Branches and Leaves

WANG Long; YANG Lei; XU Lanjiao; YANG Yuling; LI Huoping; LIU Lei; QU Mingren; LIANG Huan

doi:10.3969/j.issn.1006-267x.2022.11.046

Chinese Journal of Animal Nutrition >

2022 , Vol. 34 >Issue 11: 7282 - 7290

DOI: https://doi.org/10.3969/j.issn.1006-267x.2022.11.046

RESEARCH PAPER

Effects of Different Processing Methods on Nutritional Value of Degreasing Camphor Branches and Leaves

WANG Long ,
YANG Lei ,
XU Lanjiao ,
YANG Yuling ,
LI Huoping ,
LIU Lei ,
QU Mingren ,
LIANG Huan

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1. Jiangxi Province Engineering Research Center of Feed Development, Jiangxi Province Key Laboratory of Animal Nutrition, Jiangxi Agricultural University, Nanchang 330045, China;
2. Animal Nutrition and Feed Safety Innovation Team, Jiangxi Agricultural University, Nanchang 330045, China;
3. Woody Spice (East China) Engineering Technology Research Center of National Forestry and Grass Administration, Forestry College of Jiangxi Agricultural University, Nanchang 330045, China;
4. Agriculture, Rural and Grain Bureau of Yushui District, Xinyu City, Xinyu 338000, China

Received date: 2022-05-07

Online published: 2022-11-14

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Abstract

The purpose of this experiment was to compare the effects of different processing methods on the nutritional value of degreasing camphor branches and leaves using Cornell net carbohydrate-protein system (CNCPS) method and rumen in vitro fermentation method. The single factor design was used in the experiment, and four groups were set up, namely natural drying group (control group), artificial drying group, pellet feed group and silage fermentation group, each group contained four replicates. The effects of different processing methods on the nutritional components, the carbohydrate (CHO) components in CNCPS and the rumen in vitro fermentation parameters of degreasing camphor branches and leaves were analyzed. The results showed that:1) the crude protein (CP) and acid washing insoluble protein (NDIP) contents of the pellet feed group were significantly higher than those of other groups (P<0.05), and the neutral detergent fiber (NDF), acid detergent fiber (ADF) and acid detergent lignin (ADL) contents were significantly lower than those of other groups (P<0.05). The crude ash (Ash) content of silage fermentation group was significantly higher than that of natural drying group and pellet feed group (P<0.05), and the water-soluble carbohydrate (WSC) content was significantly higher than that of other groups (P<0.05). The starch content of natural drying group was significantly lower than that of other groups (P<0.05). 2) The rapidly degraded carbohydrate (CA), moderately degraded carbohydrate (CB1) and non-structural carbohydrate (NSC) contents of pellet feed group were significantly higher than those of other groups (P<0.05), and the CHO and non-degraded carbohydrate (CC) contents were significantly lower than those of other groups (P<0.05). The slowly degraded carbohydrate (CB2) content of artificial drying group was significantly higher than that of natural drying group and silage fermentation group (P<0.05). 3) The in vitro dry matter digestibility (IVDMD) and ammonia nitrogen (NH₃-N), total volatile fatty acid (TVFA) concentrations of natural drying group were significantly lower than those of other groups (P<0.05), the microbial protein (MCP) concentration was significantly lower than that of artificial drying group and silage fermentation group (P<0.05), and the acetic acid/propionic acid (A/P) value was significantly higher than that of other groups (P<0.05). The IVDMD of pellet feed group was significantly higher than that of other groups (P<0.05), and the NH₃-N and TVFA concentrations were significantly higher than that of artificial drying group and silage fermentation group (P<0.05). To sum up, comprehensive the results of conventional nutritional components, CHO components in CNCPS and in vitro fermentation parameters, the artificial drying, granulation and silage treatments can improve the nutritional value of degreasing camphor branches and leaves, and the granulation treatment effect is the best.

Key words： camphor branches and leaves; CNCPS; nutritional value; silage; pellet feed

Cite this article

WANG Long , YANG Lei , XU Lanjiao , YANG Yuling , LI Huoping , LIU Lei , QU Mingren , LIANG Huan . Effects of Different Processing Methods on Nutritional Value of Degreasing Camphor Branches and Leaves[J]. Chinese Journal of Animal Nutrition, 2022 , 34(11) : 7282 -7290 . DOI: 10.3969/j.issn.1006-267x.2022.11.046

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