夏播青贮玉米与饲用高粱青贮效果的评价  

Comparison of Silage Quality of Summer-seeding Silage Maize and Forage Sorghum

作　　者：张金霞 李世恩 刘雨田 梁万鹏 朱正生 施海娜 Zhang JinXia;Li Shi en;Liu Yutian;Liang Wanpeng;Zhu Zhengsheng;Shi Haina(Qingyang Academy of Agricultural Sciences,Qingyang Gansu 745000,China)

机构地区：[1]甘肃省庆阳市农业科学研究院,甘肃庆阳745000

出　　处：《草学》2023年第3期60-63,共4页Journal of Grassland and Forage Science

基　　金：甘肃省现代农业科技支撑体系区域创新中心重点科技项目“陇东旱塬草羊循环农业关键技术与模式应用”项目编号:2019GAAS45-2;全国畜牧总站下达“发酵饲料制作技术优化及示范”资金;“三区人才”经费共同资助。

摘　　要：本研究为探索夏播饲草高效利用途径,采用单因素完全随机设计,分别用聚乙烯膜制作豫青贮23号青贮、夏播大卡饲用高粱青贮和两种原料以5∶5比例混合的裹包青贮,分别设为A组、B组和C组,每个处理3个重复。发酵65d时开封,比较青贮的发酵品质及营养成分。结果表明,A组、B组和C组的感官评价结果均为19分,属优等青贮,青贮香味浓、颜色青绿、结构清晰,家畜适口性强;A组、B组和C组的总挥发性脂肪酸(VFA)、乙酸(AA)、丙酸(PA)、异丁酸(IDA)、丁酸(DA)、异戊酸(IA)、戊酸(VA)等有机酸含量组间差异均不显著(P>0.05);B组的NH_(3)-N/TN值达9.18%,显著高于A组和C组(p<0.05);C组的NH_(3)-N/TN值为4.27%,显著低于A组和C组(P<0.05)。因此,混合青贮有利于降低饲用高粱在青贮发酵过程中蛋白的损失,改善青贮发酵品质。This study have compared the silage quality of summer seeding(replanted after wheat harvest)silage maize and forage sorghum to choose a good way for using.When harvest time,One factor design was used to investigate the quality of pre-silage No.23 maize,darger forage sorghum and their 5∶5 mixed were ensiled by wrapping package polythelene membrane for 65 days,The treatments were respectively group A,group B and group C,Each treatment repeated three times.The results show that the sensory scores of group A,group B and group C are all 19,which are good silage with green color,aromatic flavor and palatability for cattle and sheep.There is no significant difference in the contents of VFA、AA、PA、IDA、DA、IA and VA eatl organic acids among the treatments(P>0.05).The ratio of NH_(3)-N/TN in group B is 9.18%.It’s higher than that of group A and group C(P<0.05)There is no significant difference in group A and group C.The ratio of NH_(3)-N/TN in group C is 4.27%.So mixed silage has reduced nutrient loss during fermentation and improving fermentation quality of forage sorghum silage.DM、NDF、CP、EE、Ash of each treatment has no significant difference between group A,group B and group C(P>0.05).

关 键 词：夏播 青贮玉米 饲用高粱 青贮 庆阳市 

分 类 号：S816.53[农业科学—饲料科学]