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Acta Prataculturae Sinica ›› 2023, Vol. 32 ›› Issue (7): 135-148.DOI: 10.11686/cyxb2022333

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Effects of different additives on fermentation quality of bamboo shoot shell and growth performance and rumen fermentation function of Hu Sheep

Hao-qian DANG(), Juan-qing QIN(), Yu-kang GUO, Fu ZHANG, Ying-gang WANG, Qing-hua LIU()   

  1. College of Animal Science (College of Bee Science),Fujian Agriculture and Forestry University,Fuzhou 350002,China
  • Received:2022-08-17 Revised:2022-09-19 Online:2023-07-20 Published:2023-05-26
  • Contact: Qing-hua LIU

Abstract:

The aim of this experiment was to investigate the effects of different additives on the nutrient composition and fermentation quality when fermenting bamboo shoot shells, and to investigate the effects of the various ensilage products on production performance, meat amino acids, blood biochemical indexes and rumen fermentation parameters of Hu Sheep. Three silages were tested: CK (no additives), FM (formic acid 10 mL·kg-1+EM composite bacteria 20 mL·kg-1) and FCM (formic acid 10 mL·kg-1+cellulase 150 mL·kg-1+EM composite bacteria 20 mL·kg-1) were screened out through the pre-experiment, and the bamboo shoot shells were ensiled for 45 days, at which point a Hu Sheep feeding experiment was carried out. In the feeding experiment, 30 healthy, disease-free male Hu Sheep with similar body weight were selected and randomly divided into 3 groups with 10 sheep in each group. After a pre-experiment adaptation period of 7 days, the diet-evaluation period was 60 days. To explore effects of the three silages on the sheep weight gain and physiological indicators, meat amino acids, blood biochemical indexes and rumen fermentation parameters of the Hu Sheep were monitored. It was found that: 1) Dry matter (DM) contents were 35.58% and 36.60%, respectively in the FM and FCM silages while and crude protein (CP) contents were 11.27%, 12.09%, respectively. The values for FCM silage were significantly higher than for FM silage (P<0.05) and the treated silage DM and CP values were all significantly higher than corresponding values for the CK silage (33.20%, 9.75%) (P<0.05). Neutral detergent fiber (NDF) values in FM and FCM silages differed significantly (39.46%, 37.09%) (P<0.05); And were significantly lower (P<0.05) than those in CK silages (44.16%), while acid detergent fiber (ADF) values of FM and FCM silages (38.09%, 37.49%) were significantly lower (P<0.05) than in CK silage (41.62%). 2) The body weight, carcass weight, net meat weight, and eye muscle area content in Hu Sheep fed FCM silage were 22.11 kg, 10.41 kg, 9.48 kg, 14.41 cm2, respectively; These values were all significantly higher than those of sheep fed CK silage (20.79 kg, 9.74 kg, 8.71 kg, 11.62 cm2) (P<0.05). 3) The weights of liver, rumen, abomasum, spleen, small intestine, large intestine and rumen organ index in sheep fed FCM silage were 332.76 g, 475.32 g, 85.15 g, 32.55 g, 434.63 g, 303.48 g, 2.15%, respectively, significantly higher (P<0.05) than those fed FM silage (319.78 g, 447.18 g, 75.05 g, 29.01 g, 416.62 g, 286.70 g, 2.04%) and CK silage (297.88 g, 418.76 g, 60.09 g, 26.05 g, 399.01 g, 279.36 g, 2.01%); The liver and rumen weights of sheep fed FM silage were significantly higher than those in the CK group (P<0.05). 4) Levels of superoxide dismutase in the blood plasma of sheep fed FM and FCM silages were 27.16, 30.96 U·L-1, respectively, significantly higher (P<0.05) than those in sheep fed CK silage (20.69 U·L-1). Similarly, high density lipoprotein levels in the blood plasma of sheep fed FM and FCM silages were 1.72, 1.77 mmol·L-1, respectively, higher than those of sheep fed CK silage (1.12 mmol·L-1). Furthermore, contents of malondialdehyde in blood plasma of sheep fed FM and FCM silage (0.57, 0.59 nmol·mL-1) were significantly lower (P<0.05) than those of sheep fed CK silage (1.17 nmol·mL-1) and glutathione peroxidase in blood plasma of sheep fed FCM silage (328.39 U·mL-1) was significantly higher (P<0.05) than that in sheep fed CK silage (278.01 U·mL-1). 5) The contents of valine, isoleucine and phenylalanine in the longissimus dorsi muscle of sheep fed FCM silage were 2.75, 8.49, 7.35 g·kg-1, respectively, significantly higher than those of the sheep fed FM silage (1.92, 5.19, 6.17 g·kg-1) and CK silage (1.66, 5.96, 6.03 g·kg-1) (P<0.05), while histidine and serine contents of sheep fed FCM silage were 3.87, 6.70 g·kg-1, significantly higher than those in sheep fed CK silage (2.20, 5.43 g·kg-1) (P<0.05). To sum up, the FCM treatment significantly improved the nutritional value of bamboo shoot silage, and Hu Sheep fed FCM silage performed the best.

Key words: bamboo shoot shell, additive, fermentation quality, Hu Sheep, growth performance, rumen fermentation