Effect of Filling Density on Quality and Aerobic Stability of Leymus chinensis and Alfalfa Silage

doi:10.11733/j.issn.1007-0435.2023.01.030

Acta Agrestia Sinica ›› 2023, Vol. 31 ›› Issue (1): 263-271.DOI: 10.11733/j.issn.1007-0435.2023.01.030

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Effect of Filling Density on Quality and Aerobic Stability of Leymus chinensis and Alfalfa Silage

LIU Yi-chao¹, SI Qiang¹, LIU Ming-jian¹, LU Xuan², YAN Meng³, GE Gen-tu¹, WANG Zhi-jun¹, JIA Yu-shan¹

1. College of Grassland Resources and Environment, Inner Mongolia Agricultural University, Key Laboratory of Forage Grass Cultivation Processing and Efficient Utilization, Ministry of Agriculture, Hohhot, Inner Mongolia 010000, China;
2. Forestry and Grassland Bureau of Tongliao Horqin Left middle Banner, Baokang, Inner Mongolia 029300, China;
3. College of Agriculture, Inner Mongolia University for Nationalities, Tongliao, Inner Mongolia 028000, China

Received:2022-07-11 Revised:2022-09-05 Online:2023-01-15 Published:2023-02-07

装填密度对羊草和苜蓿青贮品质及有氧稳定性的影响

刘逸超¹, 司强¹, 刘明健¹, 卢轩², 闫蒙³, 格根图¹, 王志军¹, 贾玉山¹

1. 内蒙古农业大学草原与资源环境学院, 农业部饲草栽培、加工与高效利用重点实验室, 内蒙古呼和浩特 010000;
2. 通辽市科尔沁左翼中旗林业和草原局, 内蒙古保康 029300;
3. 内蒙古民族大学农学院, 内蒙古通辽 028000

通讯作者: 贾玉山, E-mail:jys_nm@sina.com
作者简介:刘逸超(1998-)，男，汉族，内蒙古呼和浩特人，博士研究生，主要从事牧草饲料加工与贮藏研究，E-mail:liuyichao_nm@163.com
基金资助:
天然青干草产品加工与安全贮藏关键技术研究(2020GG0032)；规模化优质苜蓿草关键生产与加工利用技术研究(2021-国家乳创中心-1)资助

Abstract

Abstract: Silage quality and aerobic stability are the key factors affecting the utilization of silage. The aim of this experiment was to study the effects of filling density on silage quality,aerobic stability,and microbial count of Leymus chinensis and Alfalfa silage. In this experiment,Leymus chinensis at the heading stage and Alfalfa at the early flowering stage were used as raw materials. The silage densities were set to 600 kg·m^-3,700 kg·m^-3 and 800 kg·m^-3,respectively,with 3 replicates in each group. Sampling and analysis were carried out at 60 days of silage and 8 days of aerobic exposure. The results showed that Leymus chinensis silage and alfalfa silage had the lowest pH value,the highest crude protein and soluble carbohydrate content,the highest number of lactic acid bacteria,and the best silage quality at 800 kg·m^-3 filling density. The best aerobic stability was found for Leymus chinensis silage at 800 kg·m^-3 filling density and for Alfalfa silage at 700 kg·m^-3 filling density. After aerobic exposure,the number of lactic acid bacteria in each treatment decreased significantly (P<0.05),the number of yeast and aerobic bacteria increased significantly (P<0.05),and mold produced.

Key words: Leymus chinensis, Alfalfa, Density, Silage quality, Aerobic stability

摘要： 青贮品质和有氧稳定性是影响青贮饲料利用效果的关键因素，本试验旨在研究装填密度对羊草(Leymus chinensis)和紫花苜蓿(Medicago sativa L.)青贮品质、有氧稳定性和微生物数量的影响。本试验以抽穗期的羊草和初花期的苜蓿为原料，青贮密度分别设置为600 kg·m^-3，700 kg·m^-3，800 kg·m^-3，每组3个重复，在青贮60天和有氧暴露8天时取样分析。结果显示，羊草青贮和苜蓿青贮在800 kg·m^-3装填密度下的pH值最低，粗蛋白质和可溶性碳水化合物含量最高，乳酸菌数量最多，青贮品质最好。羊草青贮在800 kg·m^-3装填密度下有氧稳定性最好，苜蓿青贮在700 kg·m^-3装填密度下有氧稳定性最好。有氧暴露后各处理的乳酸菌数量显著下降(P＜0.05)，酵母菌和好气性细菌数量显著上升(P＜0.05)，苜蓿青贮有氧暴露后有霉菌产生。

关键词: 羊草, 苜蓿, 密度, 青贮品质, 有氧稳定性

CLC Number:

S551+.7

LIU Yi-chao, SI Qiang, LIU Ming-jian, LU Xuan, YAN Meng, GE Gen-tu, WANG Zhi-jun, JIA Yu-shan. Effect of Filling Density on Quality and Aerobic Stability of Leymus chinensis and Alfalfa Silage[J]. Acta Agrestia Sinica, 2023, 31(1): 263-271.

刘逸超, 司强, 刘明健, 卢轩, 闫蒙, 格根图, 王志军, 贾玉山. 装填密度对羊草和苜蓿青贮品质及有氧稳定性的影响[J]. 草地学报, 2023, 31(1): 263-271.

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Effect of Filling Density on Quality and Aerobic Stability of Leymus chinensis and Alfalfa Silage

装填密度对羊草和苜蓿青贮品质及有氧稳定性的影响

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