摘要
The present experimental study was conducted to determine the effects of xylanase supplementation on growth performance, nutrient digestibility and digestive enzyme activities of mori, Cirrhinus mrigala. Mori with an initial body weight of 8.34 ± 0.23 g were fed seven experimental diets: a diet with high fish meal content (positive control, PC), a diet with high plant content (negative control, NC), and five other diets with increasing levels of xylanase (680, 1273, 1882, 2486 and 3091 U/kg). Each diet was fed to triplicate groups of 15 fish each for 60 days. After the trial termination, supplementation of xylanase significantly improved final weight (FW), weight gain (WG) and specific growth rate (SGR) compared to NC diet. The best feed conversion ratio (FCR) was observed at 1882 U/kg of xylanase supplementation level which was non-significant (P > 0.05) to PC diet (high fish meal content). Whole body proximate composition and apparent digestibility coefficient (ADC%) for dry matter (DM), crude protein (CP), crude fat (CF), crude ash (CA) and gross energy (GE) were significantly affected by xylanase supplementation. Activities of hepatopancreatic and intestinal amylase, protease and lipase showed an increasing trend with the increase in xylanase supplementation level, peaking at 1882 U/kg of xylanase (non-significant (P > 0.05) to PC diet) and declining thereafter (2486 U/kg-3091 U/kg). Quadratic regression analysis showed that 1948 U/kg of xylanase was the optimum value for supplementation of xylanase in plant-based diet. In conclusion, exogenous xylanase supplementation improved the growth performance, nutrient digestibility and digestive enzyme activities in juvenile mori fed plant-based diet.
摘要译文
进行了本实验研究，以确定补充木聚糖酶对Mori，Cirrhinus Mrigala的生长性能，营养消化率和消化酶活性的影响。最初体重为8.34±0.23 g的MORI喂了七种实验饮食：一种具有高鱼粉含量（阳性对照，PC）的饮食，植物含量高的饮食（阴性对照，NC）和其他五种饮食增加的饮食木聚糖酶的水平（680、1273、1882、2486和3091 U/kg）。每种饮食均喂食，每60天，分别为15只鱼。在试验终止后，与NC饮食相比，补充木聚糖酶可显着改善最终体重（FW），体重增加（WG）和特定生长速率（SGR）。在1882 U/kg的木聚糖酶补充水平上观察到最佳的饲料转化率（FCR），该水平不显着（p> 0.05）（p> 0.05）（高鱼粉含量）。补充木聚糖酶，全身近端的组成和明显的消化率系数（ADC％），粗蛋白（CP），粗脂脂肪（CF），粗灰（CA）和毛（GE）受到木聚糖酶补充的显着影响。肝癌和肠淀粉酶，蛋白酶和脂肪酶的活性随着木聚糖酶补充水平的增加而显示出越来越多的趋势，在1882 U/kg的木聚糖酶峰值达到峰值二甲烷酶（PC饮食中的无显着性（P> 0.05）），此后下降（2486 U//2486 U//kg-3091 u/kg）。二次回归分析表明，1948年U/kg的木聚糖酶是在植物饮食中补充木聚糖酶的最佳值。总之，补充外源性木聚糖酶改善了少年莫里喂养植物性饮食中的生长性能，营养消化率和消化酶活性。
Hafsa Nadeem; Syed Zakir Hussain Shah; Mahroze Fatima; Maryam; Muhammad Mudassar Shahzad. Effects of exogenous xylanase supplementation in plant-based diets on growth performance, nutrient digestibility and digestive enzyme activities of juvenile mori (Cirrhinus mrigala)[J]. Animal Feed Science and Technology, 2022,291