8Davit G,Chamberlain J Q.The effects of the rate of addition of formic acid and sulphuric acid on the ensilage of perennial ryegrass in laboratory silos[J].Journal of the Science of Food and Agriculture,1987,38:217-228
9Owens V N,Albrecht K A,Muck R E,Duke S H.Protein degradation and fermentation characteristics of red clover and alfalfa silage harvested with varying levels of total nonstructural carbohydrates[J].Crop Science,1999,39:1873-1880
10Han K J,M Collins,E S Vanzant,et al.Bale density and moisture effects on alfalfa round baie silage[J].Crop Science,2004,44(3):914-919