饲喂全株玉米青贮及额外补充碳酸氢钠对疆岳驴生长性能、消化率、血清生化指标及经济效益的影响

doi:10.16431/j.cnki.1671-7236.2021.07.013

Abstract

Abstract: This experiment was conducted to study the effects of two whole corn silage ratios and additional sodium bicarbonate supplementation on growth performance,nutrient apparent digestibility,serum biochemical indexes and economic benefits in Jiangyue donkey.40 healthy male donkeys (106.02 kg±11.81 kg) aged from 6 to 8 months were randomly divided into 5 groups (n=8 in each group).According to isoenergetic and isonitrogenous design,the proportion of whole corn silage in crude feed was 0 (group Ⅰ),30% (group Ⅱ),60% (group Ⅲ),respectively,and supplemented with additional sodium bicarbonate groups Ⅳ (30% of whole corn silage in crude feed+sodium bicarbonate) and Ⅴ (60% of whole corn silage in crude feed+sodium bicarbonate).The normal addition of sodium bicarbonate was calculated as 0.5% of dry matter of concentrate, and the additional addition was calculated as 0.5% of dry matter of concentrate+1% of dry matter of whole corn silage.The first 12 days were the prefeeding period,and the last 120 days were the trial period.The results showed that with the increase of whole plant corn silage addition,the F/G of groups Ⅰ,Ⅱ and Ⅲ decreased gradually,and the F/G of group Ⅲ was significantly lower than that of groups Ⅰ and Ⅱ (P<0.05).The apparent digestibility of crude fat,neutral detergent fiber and crude ash in group Ⅲ was the highest,which was significantly higher than that in group Ⅱ (P<0.05).The contents of total protein,creatinine and alkaline phosphatase in group Ⅲ were significantly higher than that in group Ⅰ (P<0.05).The glucose content in group Ⅲ was significantly lower than that in group Ⅰ (P<0.01).The total cholesterol content of group Ⅲ was significantly lower than that of groups Ⅰ and Ⅱ (P<0.05).Compared with the same proportion of whole corn silage,the average daily gain of group Ⅱ was significantly higher than that of group Ⅳ (P<0.05),the average daily gain of group Ⅲ was higher than that of group V (P>0.05),the F/G of group Ⅲ was significantly lower than that of group V (P<0.05),and group Ⅱ was lower than that of group Ⅳ (P>0.05).The apparent digestibility of crude protein,crude fat,energy and ash in group Ⅳ was not significantly different from that in group Ⅱ (P>0.05).The apparent digestibility of nutrients in group Ⅴ was not significantly different from that in group Ⅲ (P>0.05).The contents of total cholesterol and the activity of alanine aminotransferase in group Ⅳ were significantly higher than that in group Ⅱ (P<0.05).The weight gain cost per kilogram of donkeys in group Ⅰ-Ⅴ were 16.40,15.10,14.79,17.34 and 16.10 yuan,respectively.The gross profit per donkey in the whole experiment period was 711.27,837.53,871.98,629.46 and 738.16 yuan,respectively.It could be concluded that under the conditions of this experiment,based on the growth performance,apparent digestibility of nutrients and serum biochemical indexes,and comprehensive economic benefit comparison,when 0.28% sodium bicarbonate was added to the basal diet (based on DM),the ratio of total silage corn to 60% of the roughage (26.67% added to the basal diet DM) was the best for feeding Jiangyue donkey,and no additional sodium bicarbonate was needed.

Key words: whole corn silage; sodium bicarbonate; growth performance; nutrient apparent digestibilities; serum biochemical indexes

CLC Number:

S816

SU Lingling, TUOHUTI Ajide, ZHANG Guoting, PAREHATIJIANG Wufuer, XIE Lirong, WANG Qiong, ABULAITI Sulaiman, NUERNISA Molaniyazi, REN Juan, ZHANG Yuhua, XIAO Hailong, XIE Peng, XIAO Haixia. Effects of Whole Corn Silage and Supplementary Sodium Bicarbonate on Growth Performance,Digestibility,Serum Biochemical Indexes and Economic Benefits in Jiangyue Donkey[J]. China Animal Husbandry and Veterinary Medicine, 2021, 48(7): 2388-2396.

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Effects of Whole Corn Silage and Supplementary Sodium Bicarbonate on Growth Performance,Digestibility,Serum Biochemical Indexes and Economic Benefits in Jiangyue Donkey

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