silage film theory

silage film theory

 silage film theory
       Grass silage with silage film process mainly consists of three phases: the formation of oxygen, anaerobic fermentation and stable. Its principle is as follows:
1. Anaerobic (ie oxygen) formed by the compacted forage harvest, the cell respiration is still in progress, under the action of the enzyme in the respiratory oxidation of sugar and heat until the depletion of oxygen in the sealed system, the formation of anaerobic the environment. But Mifengbuyan or excessive residual oxygen, will extend the forage cell respiration, consume large amounts of sugar, the accumulation of excessive heat, heat generation, inhibition of lactic acid bacteria and other beneficial microbial activity, resulting in the loss of nutrients, reducing the quality of grass silage even lead to mildew, and should therefore be excluded as much as possible within the system of oxygen. Well sealed to prevent air infiltration is the key to the formation of anaerobic environment.
2. Anaerobic fermentation in the natural state, the grass surface of the microorganism to aerobic bacteria (yeasts and molds) based. After the grass silage with silage film, with the formation of anaerobic environment, aerobic bacteria gradually stop their activities, anaerobic bacteria continue to multiply, lactic acid fermentation under anaerobic conditions is the main type of fermentation, the result of lactic acid accumulation, pH value decreased, increased acidity , thus inhibiting the development of Clostridium spore bacillus, so that forage nutrients is maintained. 3. Stable anaerobic fermentation, lactic acid accumulation within the system pH value dropped to about 4, in this acidity, lactic acid bacteria and other anaerobic microorganisms have their own inactivity, grass can be long-term preservation. However, if when air infiltration is the first yeast propagation, it is the use of silage film Silage forage value of the main complex of aerobic microorganisms, followed by mold, which consumes the sugar grass silage and lactic acid, and the decomposition of cellulose and other cell wall composition, harmful metabolites, caused by temperature and pH increase, the use of silage film to make grass silage dry matter and nutrients are subject to significant losses.
       In addition to the anaerobic environment, the system temperature also affect silage grass silage quality is a major factor, studies have shown that each increase of silage temperature 10 ℃, lactic acid content of grass silage decreased by 32% in 60 ~ 70 ℃ stage, fell 47%. In addition, lactic acid bacteria can only be developed at 55 ℃; in the next 60 ~ 65 ℃, after 1 ~ 10min then died. In addition, grass silage with increasing temperature, sugar and fat content of silage compound are greatly decreased, starch and carotene content also decreased slightly, as specified in Table 1.

silage film transmittance also have an impact on grass silage, transmitted light may contribute to the loss of certain nutrients.
In summary, the impact of grass silage with silage film main factors: ① anaerobic environment to develop and maintain; ② silage and silage film temperature of the light transmittance.
       Based on the above grass silage fermentation modulation mechanism, people invented a special silage film used for bags or wrapping on the grass silage, silage film referred to as the use of this silage film Silage film