青贮卫士(Siloguard)对高水分紫花苜蓿青贮品质的影响

Effects of Siloguard on Quality of High Moisture Alfalfa

为探究青贮卫士(Siloguard)添加剂对高水分紫花苜蓿青贮品质的影响,以初花期苜蓿鲜草(含水量78.01%)为原料,青贮卫士添加水平(与鲜苜蓿的质量比)设0.00%(CK)、0.05%、0.10%、0.15%、0.20%和0.25%计6个处理,研究了青贮卫士不同添加量对苜蓿青贮饲料发酵及营养品质的影响。结果表明:在高水分苜蓿青贮中添加适量的青贮卫士能够明显改善青贮饲料的感官品质;促进青贮饲料中的乳酸积累,抑制乙酸和丙酸产生,提升乳酸/乙酸,促使青贮饲料pH值快速下降,抑制氨态氮的生成,减少青贮饲料蛋白质的损失,有效改善发酵品质;降低苜蓿青贮饲料中的中性洗涤纤维含量,提高其相对饲用价值和可溶性糖含量。本试验条件下,青贮卫士的适宜添加量为0.10%。

To explore the effect additive of siloguard on the silage quality of high moisture alfalfa,using the early flowering alfalfa grass with moisture content of 78.01% as the raw material, six addition levels of siloguard（quality ratio of siloguard to fresh alfalfa） including 0.00%（CK）,0.05%,0.10%,0.15%,0.20% and 0.25%were set, the effects of siloguard addition on the fermentation and nutrient quality of alfalfa silage were studied.The results showed that adding a proper amount of silo guard in high water alfalfa silage could improve the sensory quality of silage obviously,promote the accumulation of lactic acid of silage,inhibit the production of acetic acid and propionic acid, increase the ratio of acetic acid to acetic acid,promote fast decrease of p H value of silage,inhibit the production of ammonia nitrogen,reduce the loss of protein of silage,effectively improve the fermentation quality,reduce the neutral washing fiber in alfalfa silage,and increase the relative feeding value and soluble sugar content.Under the condition of this test,the suitable addition amount of silo guard was 0.10%.