不同粗饲料组合效应对育肥公羊生产性能及经济效益的影响

为研究不同粗饲料组合效应对育肥公羊采食量、日增重、料肉比及经济效益的影响,试验采用单因素完全随机试验设计,将体重相近的40只小尾寒羊后备种公羊随机分为8组,每组5只。基于等能等氮原则配制日增重350 g试验饲粮,其中A组日粮中粗饲料添加苜蓿,B组添加玉米秸秆,C组添加棉花秸秆,D组添加苜蓿和棉花秸秆,E组添加苜蓿和玉米秸秆,F、G、H组添加不同比例苜蓿、棉花秸秆和玉米秸秆。试验期40 d,其中预试期10 d,正式试验期30 d。结果表明:(1)G组干物质采食量极显著高于C组和D组(P<0.01),显著高于F组(P<0.05);A、B、E、H组干物质采食量极显著高于C组和D组(P<0.01);F组干物质采食量显著高于C组(P<0.05)。(2)A组日增重极显著高于C组(P<0.01),显著高于D组(P<0.05);G组日增重显著高于C组和D组(P<0.05)。(3)A组饲粮单价最高,C组单价最低,饲料单价如下趋势:A组>E组>G组>H组>F组>D组>B组>C组,饲料总成本趋势与饲料单价趋势基本相同。(4)增重收益中A组最高,C组最低,前者比后者高35.76%;经济效益G组最高,D组最低,前者比后者高34.46%。综上,在本试验条件下,以苜蓿:玉米秸秆:棉杆为12:24:13调配日粮时,经济效益最优,为265.43元/只。

Effects of different crude composite effects on performance and economic benefits of fattening rams

In order to study the effects of different crude composite effects on daily weight gain ratio and economic benefits of fattening rams.Designed by single factor random test single factor randomized trial,the similar weight of 40 sheeps were randomly divided into 8 groups,every group had 5 reserve-rams.Daily weight gain of 350 g was prepared based on the principle of equal energy and equal nitrogen.Group A added corn alfalfa,group B added corn straw,group C added cotton straw,group D added alfalfa and cotton straw,group E added alfalfa and corn stalks,groups F,G and H added different proportions of alfalfa cotton straw and corn straw.The results showed that:(1)The dry matter intake of group G was significantly higher than that of group C and group D(P<0.01),and significantly higher than that of group F(P<0.05).The dry matter intake of groups A,B,E,H was significantly higher than that of groups C and D(P<0.01).Dry matter intake of group F was significantly higher than that of C group(P<0.05).(2)The daily gain of group A was significantly higher than that of group C(P<0.01),significantly higher than that of group D(P<0.05);the daily gain of group G was significantly higher than that of groups C and D(P<0.05).(3)Group A had the highest dietary unit price and group C had the lowest.The trend of feed unit price was as follows:group A>Group E>group G>group H>group F>group D>group B>group C.The trend of feed total cost was basically the same as that of feed unit price.(4)Group A had the highest gain and group C has the lowest gain,the former was 35.76%higher than the latter;group G had the highest economic benefit and group D was the lowest,the former was 34.46%higher than the latter.In this experiment,when the ratio of alfalfa:corn straw:cotton stalk was 12:24:13,the economic benefit was the best,and the income of each sheep was 265.43 yuan.