Effects of Different Substitution Ratios of Bamboo Shoot Shell Silage in Diets on Digestion and Metabolism of Mutton Sheep

LIU Yuan; WU Xianfeng; HUANG Qinlou; LI Wenyang

doi:10.3969/j.issn.1006-267x.2020.12.025

2020 , Vol. 32 >Issue 12: 5712 - 5723

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.12.025

Effects of Different Substitution Ratios of Bamboo Shoot Shell Silage in Diets on Digestion and Metabolism of Mutton Sheep

LIU Yuan ,
WU Xianfeng ,
HUANG Qinlou ,
LI Wenyang

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1. Animal Husbandry and Veterinary Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China;
2. Fujian Academy of Agricultural Sciences, Fuzhou 350001, China

Received date: 2020-07-05

Online published: 2020-12-07

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Abstract

Common nutrient composition analysis and in vivo digestion tests were used to assess feeding values of bamboo shoot shell silage in Hu sheep, Nubia goats and Fuqing goats. A two factors 3×4 randomized block design was adopted. Three breeds of mutton sheep (Hu sheep, Nubia goats and Fuqing goats) were separately selected twelve healthy growing wethers at 7 months of age, and the body weight were (22.18±1.13) kg, (30.32±1.17) kg and (17.09±0.91) kg, respectively; 12 mutton sheep of each breed were randomly divided into 4 treatments, and fed a basal diet (AC) and experimental diets which replaced the basal diet by 20%(A20), 40%(A40) and 60%(A60) of bamboo shoot shell silage, respectively. Each treatment had 3 replicates and 1 goat per replicate. Total intestinal apparent digestibilities of dry matter (DM), organic matter (OM), crude protein (CP), gross energy (GE), neutral detergent fiber (NDF) and acid detergent fiber (ADF) of diets were measured by total collection of feces and urine. The effects of substitution ratios of bamboo shoot shell silage on nutrient apparent digestibility of three breeds of mutton sheep were analyzed, and total intestinal apparent digestibility and effective energy value of nutrients of bamboo shoot shell silage were calculated according to substitution method. The results showed as follows: 1) GE and the contents of CP, ether extract (EE), NDF, ADF, acid detergent lignin (ADL), crude ash (Ash), calcium (Ca) and phosphorus (P) of bamboo shoot shell silage (DM basis) were 16.99 MJ/kg, 9.89%, 11.00 g/kg, 64.07%, 36.01%, 5.44%, 6.10%, 12.30 mg/kg and 0.14%, respectively. Estimated values of digestive energy (DE) and metabolizable energy (ME) in different breeds of mutton sheep were 6.01 to 9.33 MJ/kg and 4.93 to 7.65 MJ/kg. 2) The total intestinal apparent digestibilities of DM, OM and GE, fecal nitrogen, deposited nitrogen, nitrogen deposition rate and nitrogen biological value of diets were significantly affected by mutton sheep breed (P<0.01). The total intestinal apparent digestibilities of DM, OM, CP, GE, NDF and ADF of diets were significantly affected by substitution ratios of bamboo shoot shell silage (P<0.01). With the increase of substitution ratios of bamboo shoot shell silage in the diets, the digestibility and utilization of protein of diets in Hu sheep and energy substance as NDF and digestion and utilization of protein of diets in other two goat breeds were decreased, respectively. When the substitution ratios of silage shoot shell silage in the diets were less than 40%, Nubia goat had the best CP utilization efficiency, followed by Hu sheep. 3) There was no significant difference in the total intestinal apparent digestibilities of DM, OM, CP, GE, NDF, ADF and estimated values of DE, ME of silage shoot shell silage by mutton sheep breed, substitution ratios of silage shoot shell silage and their interaction (P>0.05). In conclusion, bamboo shoot shell silage is a vegetalitas unconventional feed resource with high feeding value for mutton sheep, as its high CP content, moderate NDF content, low ADF and ADL contents. There are differences in the utilization ratio of bamboo shoot shell silage among different breeds of mutton sheep. When it is used in different breeds, it is necessary to optimize the ration ratio and improve the utilization efficiency.

Key words： bamboo shoot shell silage; mutton sheep; substitution method; apparent digestibility

Cite this article

LIU Yuan , WU Xianfeng , HUANG Qinlou , LI Wenyang . Effects of Different Substitution Ratios of Bamboo Shoot Shell Silage in Diets on Digestion and Metabolism of Mutton Sheep[J]. Chinese Journal of Animal Nutrition, 2020 , 32(12) : 5712 -5723 . DOI: 10.3969/j.issn.1006-267x.2020.12.025

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