摘要
选用135头平均体重为(7.2±0.1)kg的杜×长×大三元杂交断奶仔猪,采用3×3两因子完全交叉试验设计,研究了日粮中添加3个中性蛋白酶水平(0、0.004%和0.008%)和3个酸性蛋白酶水平(0、0.004%和0.008%)对断奶仔猪生长性能的影响。试验共设9组,每组3个重复,每个重复5头猪。试验期为28 d,分为前期(1～14 d)和后期(15～28 d)2个阶段。结果表明,中性和酸性蛋白酶对断奶仔猪的前期、后期和全期的平均日增重和料重比有显著影响(P<0.05);对腹泻率无显著影响(P>0.05)。其中添加0.008%的中性蛋白酶和0.004%的酸性蛋白酶可显著提高断奶仔猪的平均日增重和平均日采食量,显著降低料重比(P<0.05),而单独在日粮中添加0.008%酸性蛋白酶时料重比最高(P<0.05)。由此可知,中性和酸性蛋白酶可一定程度上提高断奶仔猪生长性能,以添加0.008%的中性蛋白酶和0.004%的酸性蛋白酶效果最好,且两者存在互作效应。
In order to investigate the effects of neutral and acid protease on growth performance of weaned piglets, a feeding trial was conducted and 135 healthy Duroc × Landrace × Yorkshire crossbred weaned piglets with an average weight of （7.2 ± 0.9） kg in a 3 ×3 crossing design trial were randomly assigned to 9 groups （3 replicates per group and 5 piglets per replicate）. Supplemental levels of neutral protease were 0, 0. 004% and 0. 008%, respectively, and supplemental levels of acid protease were 0, 0. 004% and 0. 008%, respectively. The experiment lasted for 28 d, including early period （1-14 d） and later period （15-28 d）. The results showed that neutral and acid protease had significant effects on average daily gain （ADG） and feed/gain （F/G） during early period, later period and the whole period, but no significant effects on diarrhea ratio （P〉0.05）. Supplementation with 0. 008% neutral protease and 0. 004% acid protease simultaneously had significant increasing effects on ADG and average daily feed intake （ADFI） and decreasing effects on F/G （P〈0.05）, but F/G was the highest when only 0. 008% acid protease was added in feed. In conclusion, neutral and acid protease could improve the growth performance of weaned piglets to some degree, and supplementation with 0. 008% neutral protease and 0. 004% acid protease simultaneously was the best. And their interaction on growth performance was found.
出处
《动物营养学报》
CAS
CSCD
北大核心
2009年第6期993-997,共5页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
国家科技支撑计划瘦肉猪规模化健康养殖与饲料添加剂研制(2007BAD71B03)
国家科技支撑计划优质高产抗逆瘦肉型种猪选育研制(2007BAD71B01)
关键词
中性蛋白酶
酸性蛋白酶
断奶仔猪
生长性能
Neutral protease
Acid protease
Weaned piglets
Growth performance
