首页|混播比例对拉巴豆/青贮玉米混合青贮发酵质量及有氧稳定性的影响

混播比例对拉巴豆/青贮玉米混合青贮发酵质量及有氧稳定性的影响

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[目的]探究拉巴豆(Dolichos lablab)与青贮玉米(Zea mays)混播对混合饲草青贮质量及有氧稳定性的影响.[方法]以青贮玉米单播后青贮为对照(CK),设置青贮玉米与拉巴豆 1∶1(D1)、1∶2(D2)、1∶3(D3)、1∶4(D4)4个混播比例进行混合青贮,室温发酵60 d后测定各处理营养成分、发酵质量和有氧稳定性.[结果]青贮玉米与拉巴豆混播的混合饲草青贮后,干物质损失率和粗蛋白含量均显著升高(P<0.05),可溶性碳水化合物显著降低(P<0.05);CK pH值显著低于其他处理(P<0.05);D2处理乳酸含量最高,显著高于CK处理(P<0.05);D1 处理乙酸含量最高,显著高于CK青贮(P<0.05),与其他处理组差异不显著(P>0.05).[结论]青贮玉米/拉巴豆混合青贮能有效延长有氧稳定性时间,在暴露环境下不易发生二次发酵.综合有氧稳定时间和发酵质量,建议青贮玉米与拉巴豆的混播比例为1∶1时混合青贮较适宜.
Effect of mixed sowing ratio on the fermentation quality and aerobic stability of mixed silage of laba bean and silage maize
[Objective]In order to explore the effects of mixed sowing of Dolichos lablab and silage corn(Zea mays)on the quality and aerobic stability of mixed forage silage.[Method]The silage of silage corn after single sow-ing was used as the control(CK).Four mixed sowing ratios of silage corn and Zea mays were set as 1∶1(D1),1∶2(D2),1∶3(D3)and 1∶4(D4).After 60 days of fermentation at room temperature,the nutrients,fermentation quality and aerobic stability of each treatment were determined.[Result]The results showed that the dry matter loss rate and crude protein content of silage corn mixed with Laba bean increased significantly(P<0.05).This study demon-strated that silage corn/Laba bean mixed silage could effectively improve the aerobic stability time,and secondary fer-mentation was less likely to occur in the exposed environment.[Conclusion]Based on aerobic stability time and fer-mentation quality,we suggest that the mixed silage of corn and soybean is more suitable when the mixed ratio is 1∶1.

silage cornlaba beansproportion of mixed sowingaerobic stabilityailage quality

柯强、王斌、王腾飞、倪旺、冯琴、兰剑

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宁夏大学农学院,宁夏 银川 750021

宁夏草牧业工程技术研究中心,宁夏 银川 750021

青贮玉米 拉巴豆 混播比例 有氧稳定性 青贮质量

宁夏抗旱节水优质饲草新品种选育与良种繁育项目"一年两熟"人工草地可持续生产模式研究与示范项目宁夏高等学校一流学科建设(草学学科)项目

2019NYYZ04022021BBF02001NXYLXK2017A01

2024

草原与草坪
中国草学会 甘肃农业大学

草原与草坪

CSTPCD
影响因子:0.686
ISSN:1009-5500
年,卷(期):2024.44(1)
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