摘要
于2018年以‘豫青贮23’青贮玉米(Zea mays)为试验材料,分别在其1/2、2/3、3/4乳线期收割,然后分别添加不同的青贮发酵促进剂,青贮60 d后开袋进行感官评定并取样检测青贮玉米营养品质,旨在研究青贮发酵促进剂宜生贮宝(Sila-Max)、宜生贮康(Sila-Mix)对不同收获期全株玉米青贮营养品质的影响。结果表明:与不添加对照相比,青贮发酵促进剂对全株青贮玉米感官评价无显著影响(P> 0.05),对氨态氮(NH_(3)-N)、乳酸(LA)、乙酸(AA)、干物质回收率(DMR)、干物质(DM)、粗蛋白(CP)及水溶性碳水化合物(WSC)含量有极显著影响(P <0.01),对pH、丁酸(BA)及淀粉(ST)含量有显著影响(P<0.05)。延迟收获期对全株青贮玉米LA、 AA、 BA、 DMR、 DM、CP、粗脂肪(EE)、粗灰分(Ash)、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)、ST、WSC、48 h干物质体外消化率(IVDMD_(48 h))、48 h中性洗涤纤维消化率(IVNDFD_(48 h))及总可消化养分(TDN)有极显著影响(P <0.01),对pH有显著影响(P <0.05)。灰色关联度分析结果表明,在2/3乳线期适宜收获,青贮发酵促进剂宜生贮康适于在生产实践中推广使用。
This study aimed to investigate the effects of silage fermentation promoters on the nutritional quality of wholeplant corn silage at different harvest stages. In 2018, ‘Yu silage 23’ was used as the test material, and three treatments(control, Sila-Max, and Sila-Mix) were set at 1/2, 2/3, and 3/4 milk-line periods, repectively. After 60 days of silage, openbag sensory evaluation and sampling were conducted to determine nutritional quality. The results showed that the silage fermentation promoter had no significant effect on the sensory evaluation of the whole plant silage corn(P > 0.05), which significantly affected ammonia nitrogen(NH_(3)-N), lactic acid(LA), acetic acid(AA), dry matter recovery(DMR), dry matter(DM), crude protein(CP), and water-soluble carbohydrate(WSC) content(P < 0.01), as well as the p H, butyric acid(BA),and starch(ST) content(P < 0.05). The delayed harvest period had a significant impact on the whole plant corn silage LA,AA, BA, DMR, DM, CP, ether extract(EE), crude ash(Ash), neutral detergent fiber(NDF), acid detergent fiber(ADF), ST,WSC, 48 h in vitro dry matter digestibility(IVDMD_(48 h)), 48 h in vitro neutral detergent fiber digestibility(IVNDFD_(48 h)), and total digestible nutrients(TDN)(P < 0.01), as well as the p H(P < 0.05). The gray correlation results show that the stage when the milk-line is at 2/3 is suitable for harvesting, and the silage fermentation promoter Sila-MIX is suitable for promotion and use in production practice.
作者
范凯利
苏亚军
吴建平
李玉
豆思远
张瑞
李泽民
贾莉
雷赵民
FAN Kaili;SU Yajun;WU Jianping;LI Yu;DOU Siyuan;ZHANG Rui;LI Zemin;JIA Li;LEI Zhaomin(College of Animal Science and Technology,Gansu Agricultural University,Lanzhou 730070,Gansu,China;Gansu Academy of Agricultural Sciences,Lanzhou 730070,Gansu,China;Animal Husbandry Technology Promotion Station of Gansu Province,Lanzhou 730030,Gansu,China;Gansu Center for Animal Disease Control and Prevention,Lanzhou 730046,Gansu,China)
出处
《草业科学》
CAS
CSCD
北大核心
2022年第3期586-596,共11页
Pratacultural Science
基金
甘肃省高等学校产业支撑计划“平凉红牛种养结合高效循环生产体系建设技术应用”(2020C-08)
甘肃省农业农村厅现代丝路寒早农业“草食畜种养结合循环生产体系建设技术研究与应用”专项(GSSLCSX-2020-1)
甘肃省科技重大专项计划“肉牛高效生态营养技术体系研究与示范”(17ZD2NC020)
甘肃省现代农业(草食畜)产业技术体系专项(GARS-CSX-1)。
关键词
全株玉米
青贮发酵促进剂
收获时间
发酵品质
营养品质
消化率
the whole corn
silage fermentation promoter
harvest time
fermentation quality
nutritional quality
digestibility
