高丹草与黑麦草适宜混贮比例研究  

Mixed Silage of Sorghum Hybrid Sudan Grass and Perennial Ryegrass with Different Proportions

作　　者：尤思涵 都帅 周忠义 格根图 宛涛 贾玉山 YOU Si-Han;DU Shuai;ZHOU Zhong-Yi;Gegentu;WAN Tao;JIA Yu-Shan(Inner Mongolia Agricultural University,College of Grassland,Resources and Environment,Hohhot,Inner Mongolia 010019,China;Zhejiang University,College of animal sciences,Institute of Feed Science,Hangzhou,Zhejiang Province 310058,China;Yakeshi Grassland station,Yakeshi,Inner Mongolia 022150,China)

机构地区：[1]内蒙古农业大学草原与资源环境学院,内蒙古呼和浩特010019 [2]浙江大学动物科学学院,饲料科学研究所,浙江杭州310058 [3]内蒙古牙克石市草原站,内蒙古牙克石022150

出　　处：《草地学报》2021年第4期821-827,共7页Acta Agrestia Sinica

基　　金：草产品加工利用关键技术研发与产业化示范创新人才团队;十三五国家重点研发计划(2017YFD052013)项目资助。

摘　　要：为研究高丹草(Sorghum bicolor×Sorghum sudanense)与黑麦草(Lolium perenne L.)适宜的混合青贮比例,本试验将不同比例[10∶0(A),7∶3(B),5∶5(C),3∶7(D),0∶10(E)]的高丹草与黑麦草进行混合青贮,室温条件厌氧发酵60 d后测定了青贮的营养成分、发酵品质、微生物数量及体外消化特性。结果表明:随着黑麦草比例增加干物质,酸性洗涤纤维和中性洗涤纤维含量呈下降趋势,粗蛋白质含量呈上升趋势,差异显著(P<0.05);A和E组青贮pH值为4.40,显著高于B,C,D组(P<0.05);D组乳酸含量达到最大值,显著高于A,B,C组(P<0.05);E组乙酸含量最低,显著低于其他各组(P<0.05);A组氨态氮含量最高,E组最低,差异显著(P<0.05)。B,C,D组乳酸菌数量显著高于A和E组(P<0.05);混合青贮中,D组干物质消化率显著高于B和C组(P<0.05)。本试验条件下,高丹草与黑麦草混合青贮适宜比例为3∶7。This study was conducted to evaluate chemical compositions,fermentation quality,microbial population and in vitro degradability of Sorghum hybrid Sudan grass prepared with Perennial Ryegrass at different mixing ratios silage.The Sorghum hybrid Sudan grass was prepared with and without Perennial Ryegrass at mixing ratios of 10∶0(A),7∶3(B),5∶5(C),3∶7(D)and 0∶10(E)on a fresh matter basis and stored for 60 d.The results indicated that there was significant difference on dry matter,acid detergent fibre,neutral detergent fibre and crude protein contents(P<0.05).The pH values of A and E were 4.40 respectively,which were significantly higher than in B,C and D groups(P<0.05).Compared to D and E groups,the lactic acid was significantly lower in A,B and C groups(P<0.05).The acetic acid in E group was significantly greater than that in the other groups(P<0.05)and the highest ammonia nitrogen content was observed in A group(P<0.05).Compared to A and E groups,the count of lactic acid bacteria was significantly(P<0.05)greater in B,C and D groups.In mixed silages,the in vitro dry matter digestibility in D group was significantly(P<0.05)greater than that in B and C groups.In conclusion,the ratio of mixed silage of Sorghum hybrid Sudan grass to Perennial Ryegrass is 3∶7.

关 键 词：高丹草 黑麦草 混合青贮 发酵品质 微生物数量 饲用价值 

分 类 号：S563.1[农业科学—作物学]