论文部分内容阅读
以不同生育期(抽穗期、开花期、结实期)的新疆小芦苇为实验材料,同一生育期采用鲜贮、鲜草+糖蜜10和15 g/kg、鲜草+甲酸2和3 mL/kg等5种青贮处理,并对其相互间发酵品质和营养成分进行比较。结果表明:在三个生育期中,以鲜贮的pH效果最差、甲酸组效果最好;CP含量在同一生育期内各处理组与对照组(原料草)之间具有显著差异(P<0.01),特别是在抽穗期鲜草+15.0 g糖蜜组及2.0 mL甲酸组比原料草分别高2.05%、2.53%;NDF和ADF含量变化依生育期的推进其含量逐步增加,而同一生育期的各种处理组之间ADF含量没有显著差异(P>0.05),但抽穗期里各种处理的NDF含量与对照组之间差异显著(P<0.05)。结果表明:添加甲酸可明显降低新疆小芦苇青贮pH值,最佳青贮时期是抽穗期,最佳青贮方式是鲜草+3.0 mL甲酸/kg处理。
In the same growing period, freshwater storage, fresh grass + molasses 10 and 15 g / kg, fresh grass + formic acid 2 and 3 mL / kg were used as the experimental materials in different growth stages (heading, flowering and fruiting) 5 kinds of silage treatment, and their mutual fermentation quality and nutritional components were compared. The results showed that in the three growth stages, the effect of fresh storage pH was the worst, and the formic acid group was the best. The content of CP in the same growth period was significantly different from that of the control group (P <0.01) ), Especially 2.05% and 2.53% higher than fresh grass at the heading stage of +15.0 g molasses and 2.0 mL of formic acid respectively. The contents of NDF and ADF increased gradually with the growth period, There was no significant difference in ADF content between treatments (P> 0.05), but there was significant difference (P <0.05) between NDF content of various treatments and control group at heading stage. The results showed that adding formic acid could significantly reduce the silage pH of Xinjiang reed, the best silage stage was heading date, and the best silage method was fresh grass +3.0 mL formic acid / kg.