不同吸收剂对甜菜渣青贮品质及有氧稳定性的影响  

Different Absorbents Affect Silage Quality and Aerobic Stability of Beet Pulp

作　　者：张微微[1] 张永根[1] 

机构地区：[1]东北农业大学动物科学技术学院,哈尔滨150030

出　　处：《动物营养学报》2011年第9期1577-1583,共7页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：农业部现代农业(奶牛)产业技术体系(nycytx-02-02)

摘　　要：本试验旨在探讨粉碎干稻桔、干玉米秸、干豆荚作为吸收剂对甜菜渣青贮品质、有氧稳定性的影响。试验分为5组,以湿甜菜渣青贮(无添加)为阴性对照组(水分为82%),湿甜菜渣中分别添加20%(鲜重基础)的粉碎干稻秸(稻秸组)、粉碎干玉米秸(玉米秸组)、干豆荚(豆荚组)和麸皮(阳性对照组)后青贮(水分约70%),每组10个重复,每个重复1 kg。结果表明:1)吸收剂的添加显著提高了甜菜渣青贮氨态氮/总氮(P<0.05)、乳酸含量(P<0.01)和乙酸含量(P<0.01),显著降低干物质损失率(P<0.01)和水溶性碳水化合物损失率(P<0.05),降低丁酸的含量,尤其是稻秸组和豆荚组,未检测到丁酸含量。2)吸收剂的添加并未影响甜菜渣青贮营养成分。3)吸收剂的添加显著提高了甜菜渣青贮有氧稳定性及暴露在空气中后各时间点的水溶性碳水化合物含量(P<0.05);豆荚组有氧稳定性最高,达216 h。结果提示,添加吸收剂有助于湿甜菜渣青贮品质的提高,养分流失减少,有氧稳定性提高;综合而言,3种吸收剂中,以豆荚和稻秸作为青贮吸收剂效果较优。The study was conducted to investigate the effects of absorbents（dry rice straw,dry corn stalk and dry pods） on the silage quality and aerobic stability of beet pulp.The treatments in this study consisted of 5 groups： wet beet pulp silage without absorbent was used as the negative control group（moisture was 82%）;dry rice straw（rice straw group）,dry corn stalk（corn stalk group）,dry pods（pods group） and wheat bran（positive control group） were added into wet beet pulp by 20%（fresh weight basis）,respectively.The mixtures（moisture was about 70%） were ensiled.There were 10 replicates in each group and 1 kg per replicate.The results showed as follows： 1） the addition of absorbents significantly increased ammoniacal nitrogen（NH3-N）/total nitrogen（P0.05）,lactic acid content（P0.01） and acetic acid content（P0.01）,but significantly decreased loss rates of dry matter and water-soluble carbohydrate（WSC）（P0.05）,as well as the content of butyric acid,especially in rice straw group and pods group,the butyric acid contents in which were unidentified.2） The addition of absorbents didn＇t affect the nutrient composition of beet pulp silage.3） The addition of absorbents significantly increased the WSC content after different exposure time in air and the aerobic stability of beet pulp（P0.05）,the aerobic stability of pods group was 216 h,which was the highest among all groups.The results indicate that the addition of absorbents improves the silage quality,reduces the nutrient loss and improves aerobic stability of beet pulp silage;to sum up,corn stalk and pods are two kinds of optimal absorbents for silage.

关 键 词：甜菜渣 吸收剂 青贮品质 有氧稳定性 

分 类 号：S816.53[农业科学—饲料科学]