Feeding Value Assessment of Sugarcane Tops and Leaves in Mutton Sheep

WANG Shiqin, ZHANG Naifeng, DENG Kaidong, JIANG Chenggang, DIAO Qiyu

doi:10.3969/j.issn.1006-267x.2018.03.040

Chinese Journal of Animal Nutrition >

2018 , Vol. 30 >Issue 3: 1146 - 1154

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.03.040

Molecular Nutrition

Feeding Value Assessment of Sugarcane Tops and Leaves in Mutton Sheep

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1. Key Laboratory of Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
2. College of Animal Science and Technology, Jinling Institute of Technology, Nanjing 210038, China

Received date: 2017-09-01

Online published: 2018-03-05

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Abstract

Common nutrient composition analysis, in situ and in vivo digestion tests were used to assess feeding values of sugarcane tops and leaves in mutton sheep. Three Dorper×thin-tailed Han crossbred F₁ wethers fitted with permanent rumen fistulas were used as experimental animals. Nylon-bag technique was used to estimate ruminal degradation characteristics of sugarcane tops and leaves. Six Dorper×thin-tailed Han crossbred F₁ adult male sheep with body weight of (67.0±5.1) kg were used in in vivo digestion test. The pre-test period lasted for 10 d, and the test lasted for 6 d. Sugarcane tops and leaves were ad libitum fed. Dry matter intake (DMI) and nutrient apparent digestibility were measured by total collection of feces and urine. The results showed as follows:1) gross energy (GE), and contents of crude protein (CP), ether extract (EE), neutral detergent fiber (NDF), acid detergent fiber (ADF), crude ash (Ash), calcium (Ca) and phosphorus (P)[dry matter (DM) basis] were 16.58 MJ/kg, 7.26%, 1.23%, 68.15%, 34.54%, 7.02%, 0.52% and 0.14%, respectively; 2) ruminal effective degradability of DM, OM, CP, NDF and ADF of sugarcane tops and leaves were 45.53%, 44.14%, 49.33%, 33.02% and 35.26%, respectively; 3) sugarcane tops and leaves DMI of mutton sheep was 942.95 g/d accounted for 1.39% of body weight, and the intake potential was 39.98 g/(kg W^0.75·d); 4) digestive energy of sugarcane tops and leaves was 8.32 MJ/kg for mutton sheep; 5) apparent digestibility of DM, OM, CP, NDF, ADF, Ash, Ca and P were 52.48%, 54.17%, 50.96%, 55.84%, 54.83%, 47.57%, 8.79% and 0.84%, respectively, nitrogen retention rate was 20.09%, and nitrogen biological value (NVB) was 38.68%; 6) roughage grading index (GI) of sugarcane tops and leaves was 1.16, and sugarcane tops and leaves were categorized to the fourth grade. It is concluded that sugarcane tops and leaves can be intake and utilize by mutton sheep, considering as a medium quality roughage. Consideration should be given to the characteristics of low protein content and high fiber content, as well as Ca and P supplementations when sugarcane tops and leaves are used for preparation of diet for mutton sheep.

Key words： sheep; sugarcane tops and leaves; feeding values; ruminal degradability; apparent digestibility; digestive energy

Cite this article

WANG Shiqin, ZHANG Naifeng, DENG Kaidong, JIANG Chenggang, DIAO Qiyu . Feeding Value Assessment of Sugarcane Tops and Leaves in Mutton Sheep[J]. Chinese Journal of Animal Nutrition, 2018 , 30(3) : 1146 -1154 . DOI: 10.3969/j.issn.1006-267x.2018.03.040

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