Effects of mixed sowing ratio and lactic acid bacteria on the quality of oat/common vetch mixed silage in Sichuan agricultural areas
To determine the optimal intercropping and ensiling ratios of oats and common vetch in winter fallow fields of Sichuan agricultural areas,this experiment selected"Baylor"oats(Avena sativa L.)and"Chuanbei"common vetch(Vicia sativa L.)as materials.Five intercropping ratios were used:1∶0(T1),3∶1(T2),1∶1(T3),1∶3(T4),and 0∶1(T5).The crops were harvested at the flowering stage of oats and the early podding stage of common vetch.For ensiling experiment,a control group without lactic acid bacteria inoculant(CK)and a treatment group with lactic acid bacteria inoculant(IN)were set up.After 60 days of ensi-ling,the nutritional quality,fermentation quality,and microbial counts of the samples were analyzed.The study found that with the increase in the proportion of common vetch in the intercropping,the crude protein and ash content in the forage significantly increased(P＜0.01).Post-ensiling,the dry matter,neutral detergent fiber,and acid detergent fiber content showed a decreasing trend,while the crude protein and ash content showed an increasing trend in both CK and IN groups.In the T5 treatment(sole common vetch),the pH and lactic acid bacteria counts in the CK and IN groups were significantly higher than those in other treatments(P＜0.01).The pH of T1 was significantly lower than that of other ratios(P＜0.01).No enterobacteria or molds were detected in any group.Under the same intercropping ratio,the IN group exhibited lower dry matter loss,pH,ammonia nitro-gen,organic acid content,and lactic acid bacteria counts compared to the CK group(P＜0.01),while the IN group had higher soluble carbohydrate content(P＜0.01).In summary,an intercropping ratio of 1∶3 for oats and common vetch yielded forage with superior and more balanced nutritional and fermentation quality.
万方数据
维普
