生物添加剂和含水率对紫花苜蓿和猫尾草青贮发酵品质的影响

试验旨在研究紫花苜蓿绿汁发酵液（AFGJ）、猫尾草绿汁发酵液（TFGJ）、乳酸菌制剂（LAB）、纤维素酶（CEL）及LAB＋CEL（MIX）对紫花苜蓿和猫尾草青贮发酵品质的影响。用紫花苜蓿和猫尾草各2种含水率（高、低）的原料制作了青贮。每个处理设2次重复，常温下贮存50d，开封后测定青贮的发酵品质。研究结果表明，添加剂对紫花苜蓿和猫尾草青贮的发酵品质有显著影响（P〈0．05），除AFGJ和TFGJ高含水率紫花苜蓿青贮外，各种添加剂均不同程度地改善了高、低含水率紫花苜蓿和猫尾草青贮的发酵品质；含水率对紫花苜蓿和猫尾草青贮的发酵品质有显著影响（P〈0．05），2种牧草均是低含水率优于高含水率青贮的发酵品质；添加剂和含水率对青贮的发酵品质有显著的交互作用（P〈0．05）。综合各项指标，在高、低含水率紫花苜蓿青贮中均以添加MIX效果最好；在高含水率猫尾草青贮中，添加TFGJ和AFGJ效果相近且优于其他添加剂；在低含水率猫尾草青贮中添加AFGJ、TFGJ、LAB和MIX效果相近，且优于添加CEL。结果表明，适当降低原料含水率并选择适宜的添加剂可调制优质青贮。

Effects of Biological Additive and Moisture Content on Fermentation Quality of Alfalfa and Timothy Silages

Two kinds of alfalfa and timothy with high and low moisture content were made silages to study the effects of alfalfa fermented with green juice(AFGJ),timothy fermented green juice(TFGJ),lactic acid bacteria(LAB),cellulose(CEL) and lactic acid bacteria(LAB) cellulose(MIX) on fermentation quality of alfalfa and timothy silages.Each treatment had two repeats.Silages were fermented for 50 days.The fermentation quality of silages were observed.The fermentation quality of alfalfa and timothy silages were significantly affected by additives(P<0.05),all the additives improved the fermentation quality of alfalfa and timothy silages with high and low moisture content,but there were no significant role in high moisture content alfalfa silages with AFGJ and TFGJ.The fermentation quality of alfalfa and timothy silages were significantly affected by the moisture content(P<0.05),the fermentation quality of both alfalfa and timothy silages with low moisture content were better than that with high moisture content silages.There were significant interaction between the additives and moisture content(P<0.05).The fermentation quality of alfalfa silage with high and low moisture content with MIX were the best;the fermentation quality of timothy silage with high moisture content with FGJ and TFGJ were similar,but the quality were better than other additives.The fermentation quality of timothy silage with low moisture content with AFGJ,TFGJ,LAB and MIX were similar,but the quality were better than CEL.The results showed that the treatment by reducing the moisture content and choicing the additives could improve silage quality.