不同玉米品种青贮饲料营养成分比较分析

【研究目的】为研究不同玉米品种间的青贮饲料营养物质的差异；【方法】选取104d收刈的青玉米秸秆和饲用玉米调制青贮以研究不同品种玉米青秸秆对青贮饲料营养成分的影响，60d后分析测定青贮饲料营养成分；【结果】结果表明，玉米品种明显影响青贮饲料的氨态氮、乳酸、CP、NDF和ADF含量，青玉米秸秆(粮食用)青贮饲料的乳酸、丁酸含量和ADF含量没有明显差异(p>0.05)，饲用玉米青贮的乳酸、丁酸含量显著高于青玉米秸秆的青贮饲料(p<0.05)；【结论】不同玉米品种的青贮原料对青贮发酵产物及青贮饲料营养物质含量有明显的影响

The comparison of the chemical characteristics and nutritive value of green corn stalk Silage with different variety

This experiment is to study the effect of fermented green juice (FGJ),cellulase (CEL) and fermented green juice cellulase (MIX) on fermentation quality and chemical composition of napier grass silage. Two kinds of napier grass with different moisture content(high -79.9%, low -70.0%) were made silages. Each napier grass silage was divided into four experimental groups,located FGJ,CEL,MIX and control group(CON),each treatment two repeats. The both silages were fermented for 50 days. The results showed that: 1)The addition of FGJ declined the pH value and the content of volatile base nitrogen(VBN) significantly, and the reverse trend was observed in the dry matter rate and the content of coarse protein (P<0.01,P<0.05),this treatment also raised the high moisture silage water-soluble carbohydrate (WSC) content; The addition of MIX reduced the pH of the two types of moisture silages and improved the WSC and CP(P <0.01, P <0.05), and also reduced VBN and improved DMR of the high moisture silages(P <0.01); With the addition of CEL, the VBN of high moisture silage got lower, bud WSC and CP content increased (P <0.01, P <0.05),CP of low moisture silage increase (P <0.01). 2)The pH, VBN and gas loss rate (GL. Without addition FGJ) of high moisture silage were higher than low moisture silage(P <0.01, P <0.05),but the DMR and CP were lower (P<0.01, P <0.05). 3)The low moisture content MIX and FGJ silage were quality silage. In summary, the treatment of reducing the moisture content as soon as adding FGJ or MIX to the napier grass properly can make quality napier grass silages.