Effects of Diets with Different NFC/NDF on Growth Performance, Slaughter Performance and Organ Indexes of Kid Goats

LIU Shulin, WEN Qi, ZHANG Yongsheng, BAO Siqingaowa, WANG Xue, GUO Xiaoyu, YAN Sumei

doi:10.3969/j.issn.1006-267x.2018.09.024

Chinese Journal of Animal Nutrition >

2018 , Vol. 30 >Issue 9: 3543 - 3550

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.09.024

Molecular Nutrition

Effects of Diets with Different NFC/NDF on Growth Performance, Slaughter Performance and Organ Indexes of Kid Goats

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College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China

Received date: 2018-03-01

Online published: 2018-09-20

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Abstract

This experiment was conducted to investigate the effects of diets with different ratios of non-fibrous carbohydrate (NFC) to neutral detergent fiber (NDF) (NFC/NDF) on growth performance, slaughter performance and organ indexes of Albas white kid goats under a stall-feeding condition. This experiment adopted a single-factor randomized block design. Forty weaning Albas kid goats at 4 months of age were randomly divided into control group (CG) and experimental group (EG) with 4 replicates in each group and 5 goats per replicate. The goats of CG group were fed mixed roughage diets, and the NFC/NDF were 0.13, 0.12 and 0.12 in early, medium and late fattening period, respectively; the goats of EG group fed the total-mixed ration (C:F=50:50), and the NFC/NDF were 0.78, 0.77 and 0.77, respectively. At the end of the fattening, 8 goats were selected from CG group and EG group, and then were slaughtered. The preliminary trial period was 14 d, and the formal trial period was 90 d. The results showed as follows:1) compared with CG group, the final weight and total weight gain of goats in EG group were significantly increased (P<0.05), and dry matter intake (DMI) tended to decrease (P>0.05), the feed to gain ratio was decreased significantly (P<0.05). 2) Compared with CG group, the carcass weight, dressing percentage, eye muscle area, GR value of goats in EG group were significantly increased (P<0.05); the weight of heart, liver, lung, kidney, the head, fur and skin and blood of goats in EG group were significantly increased (P<0.05). 3) The proportion of abomasum weight to the total weight of complex stomach of goats in EG group was significantly lower than that of the goats in CG group (P<0.05); the weight proportion of the rumen and abomasum to live weight of goats in EG group was significantly lower than those in the CG group (P<0.05). The proportion of the large intestine weight to live weight before slaughter and the small intestine weight of goats in EG group were significantly lower than those in CG group (P<0.05). The results suggest that, compared with the total-mixed ration group (NFC/NDF=0.77 to 0.78), feeding the mixed roughage diet (NFC/NDF=0.12 to 0.13) can decrease the growth performance, slaughter performance, and the development speed of internal organs of Albas white cashmere goats, while increase the proportion of gastrointestinal tract to live weight.

Key words： cashmere goats; growth performance; slaughter performance; organ indexes

Cite this article

LIU Shulin, WEN Qi, ZHANG Yongsheng, BAO Siqingaowa, WANG Xue, GUO Xiaoyu, YAN Sumei . Effects of Diets with Different NFC/NDF on Growth Performance, Slaughter Performance and Organ Indexes of Kid Goats[J]. Chinese Journal of Animal Nutrition, 2018 , 30(9) : 3543 -3550 . DOI: 10.3969/j.issn.1006-267x.2018.09.024

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