热研2号柱花草和热研4号王草混合青贮对其营养成分及发酵品质的影响  

Effects of Mixed Silage on Its Nutrient Composition and Fermentation Quality of Stylosanthes guianenis Reyan No.2 and Pennisetum pur-pureum×P.glaucum cv.Reyan No.4

作　　者：韩建成[1] 吴群 蔺红玲 徐志军 周汉林[1] HAN Jiancheng;WU Qun;LIN Hongling;XU Zhijun;ZHOU Hanlin(Zhanjiang Experimental Station,Chinese Academy of Tropical Agricultural Sciences,Zhanjiang,Guangdong 524091,China)

机构地区：[1]中国热带农业科学院湛江实验站,广东湛江524091

出　　处：《热带作物学报》2023年第4期809-815,共7页Chinese Journal of Tropical Crops

基　　金：中国热带农业科学院基本科研业务费专项资金项目(No.1630102022005,No.1630102022003)。

摘　　要：为合理开发和利用热带牧草资源,研究热研2号柱花草和热研4号王草混合青贮对其营养成分及发酵品质的影响,以期筛选出适宜的混合青贮比例,为调制高品质的青贮饲料提供理论依据。本研究将热研4号王草和热研2号柱花草混合青贮比例分别设置为100∶0(CK)、85∶15(A_(1))、70∶30(A_(2))、55∶45(A_(3))4组,青贮30 d后开封取样检测。结果表明:A_(2)组混合青贮感官评价最佳,随着热研2号柱花草比例的升高,pH和氨态氮/总氮(NH_(3)-N/TN)值逐渐升高,A_(1)、A_(2)、A_(3)组与CK组差异显著(P<0.05);乳酸(LA)含量逐渐降低,A_(3)组显著低于CK组(P<0.05);各试验组乳酸/乙酸(LA/AA)值均大于2.6;且A_(2)组丁酸(BA)显著低于其他各处理组(P<0.05)。随着热研2号柱花草比例升高,各处理组粗蛋白(CP)、干物质(DM)和粗脂肪(EE)含量随之升高,且显著高于CK组(P<0.05);水溶性碳水化合物(WSC)含量呈上升趋势,且各试验组差异不显著(P>0.05);中性洗涤纤维(NDF)逐渐降低,且各处理组间差异不显著(P>0.05);各试验组酸性洗涤纤维(ADF)显著降低(P<0.05);与CK相比,各处理组粗灰分(Ash)有所下降,且A_(1)、A_(2)、A_(3)组之间差异不显著(P>0.05);总之,热研2号柱花草和热研4号王草混合青贮可提高青贮饲料的发酵品质和营养价值。从发酵品质和营养价值综合考虑,A_(2)组的混合青贮比例最为适宜。The effects of mixed silage of Stylosanthes Guianensis Reyan No.2 and Pennisetum purpureum×P.glaucum cv.Reyan No.4 on fermentation quality and nutrient composition were studied to screen out the appropriate proportion of mixed silage,and provide theoretical basis for the preparation of high-quality silage.The experiment was divided into 4 groups.The mixed silage ratios of Reyan No.4 and Reyan No.2 were 100∶0(CK),85∶15(A_(1)),70∶30(A_(2))and 55∶45(A_(3)),respectively.Ensilage was unsealed for 30 days and sampled for detection.A_(2)had the best sensory evalua-tion.With the increase of the ratio of Reyan No.2,pH and NH_(3)-N/TN values gradually increased,and there were sig-nificant differences between A_(1),A_(2),A_(3)and CK(P<0.05).The lactic acid(LA)content of A_(3)was significantly lower than that of CK(P<0.05).The lactic acid/acetic acid(LA/AA)value was greater than 2.6 in all experimental groups.Butyric acid(BA)in A_(2)was significantly lower than that in other groups(P<0.05).With the proportion of Reyan No.2 increasing,the content of crude protein(CP),dry matter(DM)and ether extract(EE)in all groups increased,and were significantly higher than those of CK(P<0.05).Water-soluble carbohydrate(WSC)content showed an increasing trend,and there was no significant difference among groups(P>0.05).Neutral detergent fiber(NDF)decreased gradually,and there was no significant difference among all groups(P>0.05).Acid detergent fiber(ADF)in all groups was signifi-cantly decreased(P<0.05).The ash content of each group decreased,and there was no significant difference among A_(1),A_(2)and A_(3)compared with CK(P>0.05).In conclusion,the mixed silage of Reyan No.2 and Reyan No.4 can improve the fermentation quality and nutritional value of silage.Considering the fermentation quality and nutritional value,it is suggested that A_(2)is suitable for silage.

关 键 词：热研2号柱花草 热研4号王草 混合青贮 营养成分 发酵品质 

分 类 号：S432.22[农业科学—植物病理学]