Pakarinen Outi, Lehtomäki Annimari, Rissanen Sanna, Rintala Jukka
University of Jyväskylä, Department of Biological and Environmental Science, P.O. Box 35, FI-40014 University of Jyväskylä, Finland.
Bioresour Technol. 2008 Oct;99(15):7074-82. doi: 10.1016/j.biortech.2008.01.007. Epub 2008 Mar 6.
The effect of storage on chemical characteristics and CH4 yield (taking into account loss of VS during storage) of a mixture of grasses and ryegrass, ensiled as such (low solids content) and after drying (medium and high solids) with and without biological additive, were studied in field and laboratory trials. Up to 87% and 98% of CH4 yield was preserved with low solids grass (initial TS 15.6%) and high solids ryegrass (initial TS 30.4%), respectively, after storage for 6months, while under suboptimal conditions at most 37% and 52% of CH4 yield were lost. Loss in CH4 yield was mainly due to VS loss, presumably caused by secondary fermentation as also suggested by increasing pH during storage. Biological additive did not assist in preserving the CH4 yield.
在田间和实验室试验中，研究了储存对原样青贮（低固体含量）以及干燥后（中高固体含量）添加和不添加生物添加剂的禾本科牧草与黑麦草混合物的化学特性和甲烷产量（考虑储存期间挥发性固体的损失）的影响。储存6个月后，低固体含量牧草（初始总固体含量15.6%）和高固体含量黑麦草（初始总固体含量30.4%）分别保留了高达87%和98%的甲烷产量，而在次优条件下，甲烷产量最多损失37%和52%。甲烷产量的损失主要是由于挥发性固体的损失，这可能是由二次发酵引起的，储存期间pH值升高也表明了这一点。生物添加剂无助于保留甲烷产量。
