不同青贮发酵促进剂和青贮时间对全株青贮玉米品质的影响

为探讨不同青贮发酵促进剂和青贮时间对全株青贮玉米发酵品质的影响，以当地全株饲用玉米为原料，选择相同生长时期刈割，以青贮时间和青贮发酵促进剂为试验因素，进行现场评定、营养成分分析和青贮品质检测。结果表明：不同青贮发酵促进剂处理后得到的全株玉米饲料的感官评定均高于对照组；不同青贮发酵促进剂对全株玉米青贮后营养成分中的干物质（DM）、粗蛋白质（CP）、酸性洗涤纤维（ADF）、中性洗涤纤维（NDF）、木质素（ADL）、淀粉（ST）、粗脂肪（EE）、可溶性碳水化合物（WSG）、总营养物质（TDN）和粗灰分（CA）的含量影响显著（P<0.05）；对发酵品质中的pH、乳酸含量、乙酸含量和氨态氮含量影响显著（P<0.05）；青贮时间以第7周好于第9周。结论：全株青贮玉米发酵时间第7周（49 d）为益。青贮发酵促进剂以先牧1168和新纪元青贮宝在提高全株青贮玉米品质方面优于不使用青贮发酵促进剂和其他青贮发酵促进剂。

Effects of Different Dilage Fermentation Promoter and Silage Time on Quality of Whole plant Corn

The effects of different silage fermentation promoter and silage time on quality of whole plant corn in this study.Using local whole plant corn as raw material,Cutting at the same growth period,Taking silage time and silage fermentation promoter as experimental factors,Field evaluation, nutrient analysis and silage quality test were carried out.The results:The sensory evaluation of the whole plant corn feed treated with different ensilage fermentation promoters was higher than that of the control group;The contents of DM, CP , ADF, NDF , ADL , ST , EE , WSG , TDN and CA in the whole plant after silage were significantly affected by fermentation promoters（P<0.05）;PH , lactic acid content, acetic acid content and ammonia nitrogen content in fermentation quality were significantly affected（P<0.05）;The silage time was better in Week 7 than in Week 9.Conclusion:The fermentation time of whole silage corn was 7th week (49 days).The quality of whole plant silage corn was improved by using xianmu 1168 and new era silage, which was better than using no silage and other silage fermentation accelerators.