Effects of Different Neutral Detergent Fiber/Nonfiberous Carbohydrate Diets on Methane Emission of Meat Sheep

DING Jingmei, CHENG Shuru, DENG Kaidong, ZHANG Mingjiao, DIAO Qiyu, TU Yan

doi:10.3969/j.issn.1006-267x.2017.03.010

Chinese Journal of Animal Nutrition >

2017 , Vol. 29 >Issue 3: 806 - 813

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.03.010

Molecular Nutrition

Effects of Different Neutral Detergent Fiber/Nonfiberous Carbohydrate Diets on Methane Emission of Meat Sheep

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1. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China;
2. Key Laboratory of Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
3. College of Animal Science, Jinling Institute of Technology, Nanjing 210038, China;
4. College of Animal Science and Technology, Beijing University of Agriculture, Beijing 102206, China

Received date: 2016-09-20

Online published: 2017-03-09

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Abstract

This study investigated the effects of different neutral detergent fiber/nonfiberous carbohydrate (NDF/NFC) diets on methane emission of meat sheep. The trial was conducted according to a 4×4 Latin square design:16 Dorper×thin tailed Han crossbred wethers were randomly divided into 4 groups with 4 sheep each, and each group was randomly fed one of four total mixed pellet diets (corn stalk as the source of roughage) with the NDF/NFC of 3.02 (diet 1), 2.32 (diet 2), 1.58 (diet 3) and 1.04 (diet 4) at maintenance level, respectively. The trial included 4 periods with each lasted for 18 days, and the first 3 days of each period was an adjustment period, the following 7 days was a pretrial period and the last 8 days was an experimental period. Methane emission and the apparent digestibility of gross energy and nutrients of diets were measured in the experimental period. The results showed that the methane (CH₄) daily emission of sheep fed the diet 2 was significantly higher than that of those fed diets 3 and 4 (43.43 L/d vs. 38.88 and 35.98 L/d; P<0.05). Compared with the sheep fed diet 1, the methane emission of per kg dry matter intake (DMI) of sheep fed diets 2 and 3 was significantly increased (38.00 L/kg DMI vs. 42.24 and 41.69 L/kg DMI; P<0.05), but no significant difference was observed among sheep fed diets 2, 3 and 4 (P>0.05). With the NDF/NFC decrease, the methane emission of per kg digestible organic matter (DOM) was gradually decreased, and sheep fed the diet 4 was significantly lower than sheep fed diets 1, 2 and 3 (58.78 L/kg DOM vs. 75.00, 73.35 and 64.11 L/kg DOM; P<0.05). The methane emissions of neutral detergent fiber intake (NDFI) or acid detergent fiber intake (ADFI) were gradually increased with the NDF/NFC decrease, and the difference among sheep fed four diets was significant (P<0.05). In summary, combining with the apparent digestibility of nutrients and methane emission efficiency, the corn stalk diet with NDF/NFC of 1.04 is suited as the formula of methane emission reduction.

Key words： meat sheep; NDF/NFC; methane emission; digestible organic matter

Cite this article

DING Jingmei, CHENG Shuru, DENG Kaidong, ZHANG Mingjiao, DIAO Qiyu, TU Yan . Effects of Different Neutral Detergent Fiber/Nonfiberous Carbohydrate Diets on Methane Emission of Meat Sheep[J]. Chinese Journal of Animal Nutrition, 2017 , 29(3) : 806 -813 . DOI: 10.3969/j.issn.1006-267x.2017.03.010

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