| Twenty-four Small Tail Han sheep ewe lambs with birth body weight（3.25±0.61）kg wereselected for the experiment, randomly divided into four groups（each group n=6）by feedingdried milk (group1), complete fish meal substituting dried milk (group2) proteasepretreatment fish meal substituting dried milk (group3) and protease pretreatment fishmeal substituting dried milk but fat apart from other ingredients when feeding. At the ageof6to9days and16to19days, by experimenting with digestion and metabolism and weighingbody weight, to study the effects of protease pretreatment fish meal in milk substituteon the digestion performance and daily weight gains of6to19day’s Small Tail Han sheepewe lambs. The three groups fish meal in milk substitute contained49.94%fish meal,30.95%cottonseed oil and16.39%glucose (as DM basis). The results showed that in the1,2,3and4groups, dry matter intake was respectively.147.57,74.03,98.66,68.75(6~9d) and223.53,79.79,107.19,84.32（16~19d）g/lamb/d, organic matter intake was respectively139.10,67.23,89.61,62.44（6~9d） and210.70,72.46,97.36,76.59（16~19d）g/lamb/d,crude protein intake was respectively37.32,23.91,31.87,22.21（6~9d）and56.53,25.77,34.62,27.24（16~19d）g/lamb/d, ether extract intake was respectively45.30,32.80,43.72,30.46（6~9d）and68.62,35.35,47.50,37.37（16~19d）g/lamb/d, energy intake was respectively2961,1736,2313.6,1612.1(6~9d) and4485,1871,2513.7,1977.5(16~19d) kJ/lamb/d.Apparent digestibility of dry matter was respectively96.77%,80.80%,88.04%,81.19%(6~9d) and97.21%,73.95%,87.82%,82.41%(16~19d)；apparent digestibility of organic matterwas97.94%,85.38%,92.11%,86.41%(6~9d) and98.28%,78.24%,91.57%,86.82%(16~19d)；apparent digestibility of crude protein was93.14%,71.11%,77.30%,69.70%(6~9d) and93.06%,66.43%,77.48%,61.25%(16~19d)；apparent digestibility of ether extract was97.33,80.85,81.93,83.18(6~9d) and98.24%,78.97%,81.73%,68.28%(16~19d)；apparent digestibility of general energy was95.94%,71.11%,81.62%,77.78%(6~9d) and96.27%,68.24%,78.61%,71.28%(16~19d)；apparent digestibility of calcium was75.22%,60.80%,70.80%,54.04%(6~9d) and72.12%,50.11%,60.58%,58.21%(16~19d)；apparent digestibility of phosphorus was93.97%,74.12%,77.47%,68.26%(6~9d) and94.23%,74.21%,74.71%,69.05%(16~19d)；Nitrogenretention was2.75,0.79,1.44,0.53(6~9d) and4.29,0.81,1.50,0.87(16~19d) g/lamb/d.Daily weight gain was143.33,25.96,33.08,25.08(6~9d) and198.13,26.79,51.04、38.63(16~19d) g/lamb/d.The test concluded that: the enzyme treatment can improve the6~19dLamb’s intake digestibility daily weight gain and nitrogen retention on the fish meal inmilk substitute but effect is still lower than the milk powder milk, It is conspicuous thatthe lamb Feeding dried milk intake was increasing with age, while feeding fish meal orprotease pretreatment fish meal increased less;while fat apart from other ingredients whenfeeding is not conducive to digestion and absorption of lamb, lambs Nitrogen retention andDaily weight gain is lower too. A preliminary analysis on the physical properties of milksubstitute and electrophoresis analysis of milk substitutes and fecal samplesconfirm that treatment with proteinases could reduce the molecular weight ofsoluble protein and reduce particle size of fish meal. The solubility increasedby609%. |
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