The deterioration risk of bale silage is relatively high because of a high surface-area to volume ratio.Therefore,the damages of plastic covers of bales should receive particular attention since it may often occur during removing or transportation process.When bales are punctured,oxygen is allowed to permeate the silage and subsequently aerobic organisms flourish and metabolize the products of fermentation,and the temperature inside the bales will rise up again.So temperature is a key indicator when the mat...