中国农业科学2016，Vol.49Issue(24)：4806-4813,8.DOI:10.3864/j.issn.0578-1752.2016.24.012
不同配伍酶制剂处理玉米秸秆对肉用绵羊生长性能和营养物质消化率的影响
Effects of Corn Straw Treated with Different Compatibility Enzymes on Growth Performance and Nutrient Digestibility of Mutton Sheep
摘要
Abstract
[Objective] This experiment was conducted to investigate the effects of different compatibility enzymes on growth performance and nutrient digestibility of Dorper × Small Tail Han sheep crossbred male lambs fed with corn straw-based diets.[Method] Lambs were assigned to one of four groups of 100 animals per group with five replicates in a randomized complete block design being:control (basal diet without any supplementation),treatment groups (TG):TG Ⅰ (basal diet with enzymes preparation of Cellulase + β-glucanase + Xylanase),TG Ⅱ (basal diet with enzymes preparation of Cellulase + β-glucanase + Xylanase + Pectase),or TGⅢ (basal diet with enzymes preparation of Cellulase + β-glucanase + Xylanase + Pectase + Laccase) in a 76-day experiment including a 10-day preliminary test period and a 66-day formal trial period.The basal diets as TMR was fulfilled the growth requirements of lambs according to NRC (2007) with a concentrate:forage ratio of 4:6(at first phase) and 5:5(at second phase) (DM basis).The compound enzyme preparation for treatment diets was dissolved in water to form a 4％ solution containing a mix of cartier and enzymes,which was sprayed directly onto the corn straw at a rate of 1.0 kg/t of TMR (Air dry basis),just prior to feeding.[Result] The results showed as follows:different compatibility enzymes had significant effects on ADG and ratio of feed to gain (F/G) (P＜0.05),but no significant differences were found in dry matter intake (P=0.107).ADG of TGⅢ and TG Ⅱ was significantly higher than those in Control and TG Ⅰ (P＜0.05),and F/G of TG Ⅲ was significantly lower than that in Control (P＜0.05),but there was no difference between TGⅢ and TGⅡ or Control and TG Ⅰ (P＞0.05),respectively.Addition of enzymes preparation also increased (P＜0.05) apparent digestibility of all nutrients,except for CP(P=0.166).TGⅢ was the highest in nutrient digestibility.Apparent digestibility ofDM,OM,GE,NDF,ADF in TGⅢ was significantly higher than that in Control (P＜0.05),but there was no difference between TGⅢ and TG Ⅱ or Control and TG Ⅰ (P＞0.05).The magnitude of improvement in digestibility varied among nutrients,with the highest improvement occurred in digestibility of DM and ADF (about 11％ and 19％,respectively).The addition of enzyme preparation in TGⅢ also achieved good economic benefits.[Conclusion] It was concluded that there are positive responses to growth performance and nutrient digestibility of fattening sheep for corn stalk diet treated with different compatibility enzymes.The effect of TGⅢ was significantly better than that of TG Ⅱ,although the effects of TG Ⅲ and TG Ⅱ were both significantly.Compared with the control,average daily gain of TG Ⅲ was increased by 23.51％,nutrient digestibility was increased by 11％,feed conversion ratio was increased by 26.36％,and diet cost for lkg weight gain was reduced by 18.42％.关键词
育肥羊/复合酶制剂/秸秆/增重/消化率Key words
fattening sheep/different compatibility enzymes/corn straw/live-weight gain/digestibility引用本文复制引用
王红梅,屠焰,司丙文,聂明非,刁其玉..不同配伍酶制剂处理玉米秸秆对肉用绵羊生长性能和营养物质消化率的影响[J].中国农业科学,2016,49(24):4806-4813,8.基金项目
公益性行业(农业)科研专项经费项目(20120304202)、内蒙古自治区科技重大专项 （农业）
