摘要
为研究不同青贮密度和青贮时间对紫花苜蓿(Medicago sativa L.)发酵品质及营养成分的影响,本试验以第二茬初花期(10%植株开花)刈割的紫花苜蓿为原料,采用双因素试验设计,分别设计青贮密度550,600和650 kg·m^(-3)以及时间30,60和120d,对不同处理青贮料的发酵品质和营养成分进行分析。结果表明:除乙酸和粗蛋白(Crude protein,CP)含量外,青贮密度和时间的交互作用显著影响了苜蓿的发酵品质和营养成分(P<0.05);与密度为650kg·m^(-3)的处理组相比,密度为600kg·m^(-3)的处理组青贮30和60d后,乳酸和干物质(Dry matter,DM)含量增加,酸性洗涤纤维(Acid detergent fiber,ADF)和可溶性碳水化合物(Water soluble carbohydrate,WSC)含量减少;在密度为600kg·m^(-3)下,与青贮30d相比,青贮60d的样品中乳酸、乙酸、DM,CP和粗脂肪(Ether extract,EE)含量增加。综上,苜蓿在青贮密度600kg·m^(-3)、时间60d条件下,青贮效果最佳。
The second cut alfalfa(10%of the plants flowering)was used to make silage with different ensiling densities and times to explore its effect on nutrient composition and fermentation quality of silage.The ensiling density was 550,600,and 650kg·m^(-3),respectively;and the ensiling time was 30,60,120d,respectively.The results showed that the interaction of ensiling density and time significantly affected the fermentation quality and nutrient composition of alfalfa(P<0.05),except for acetic acid and crude protein(CP).Compared with the treatment group with a density of 650kg·m^(-3),the content of lactic acid and dry matter(DM)increased,and the contents of acid detergent fiber(ADF)and soluble carbohydrate(WSC)decreased in the treatment group with a density of 600kg·m^(-3)after 30and 60days of silage.At a density of 600kg·m^(-3),the contents of lactic acid,acetic acid,DM,CP and crude fat(EE)increased in the samples silaged for 60dcompared with 30d.Therefore,when the ensiling density was 600kg·m^(-3)and the ensiling time was 60days,the quality of alfalfa silage was the best.
作者
郝俊峰
于浩然
贾玉山
王志军
格根图
李宇宇
孙林
HAO Jun-feng;YU Hao-ran;JIA Yu-shan;WANG Zhi-jun;GE Gen-tu;LI Yu-yu;SUN Lin(Key Laboratory of Forage Cultivation,Processing and High Efficient Utilization of Ministry of Agriculture,College of Grassland Resources and Environment,Inner Mongolia Agricultural University,Hohhot,Inner Mongolia 010019,China;Inner Mongolia Academy of Agricultural&Animal Husbandry Sciences,Hohhot,Inner Mongolia 010031,China)
出处
《草地学报》
CAS
CSCD
北大核心
2022年第9期2492-2496,共5页
Acta Agrestia Sinica
基金
国家自然科学基金面上项目(31572461)
国家重点研发计划项目(2016YFC0501308)
财政部和农业农村部:国家现代农业产业技术体系
内蒙古自治区科技计划项目(2021GG0109)
内蒙古自治区科技创新引导项目(KCBJ2018047)资助。
关键词
紫花苜蓿
青贮密度
时间
交互作用
青贮品质
Medicago sativa L.
Ensiling density
Silage time
Interaction
Silage quality
