Effects Of Different Addictives On The Quality Of The Silage From Corn Straw And Its Consquences To Feeding Dairy Cows

This paper aimed to find some effective methods to treat corn silage, and to improve the utilization ratio of crude straw, a problem existing in china. First of all, the additive type and doses range were selected according to the previous reports. And4groups were designed as follows:research microbial inoculum (I), enzyme preparation (E), formic acid (F) and biological agents group (IE)(microbial inoculum and enzyme preparation) respectively. The corn silages were producd, and the qualities were evaluated by the in vitro techniques and the in vivo animal feeding trail. This paper was described in the following3sections.Trail1:The effects of different silage addictives on the qualities of corn silagesThe comparisons on the quality of corn silages from different silage addictives were carried out in this trail. Microbial inoculum (I), enzyme preparation (E), formic acid (F) and biological agents (IE)(microbial inoculum and enzyme preparation) were added into corn straw respectively, and the pH value, lactic acid, ammonia nitrogen, DM, ADF, WSC, ADF, and NDF were examined at different sampling day (0.5,1,2,3.5,7,10,20,40, and90d respectively after silage), to evaluate the qualities of corn silages from different additives. The results show that, fermentation, ultimate pH value, lactate generating speed and lactate cargoes of ammonia nitrogen, were modified by adding microbial inoculum (I) with abundant lactobacillus, esugar-tablet coccus, active lactobacillus; while there was no significant effect on the ratio of NH3-N/TN in siliage at90d. The ulitimated pH was3.69, and the lactic acid percentage was up to7.37%; NH3-N yield were610mg/kg, and the NH3-N to TN ratio was4.87%. As for the group adding enzyme preparation (E), the ulitimated pH was3.67. and the lactic acid percentage was up to7.35%; NH3-N yield were630mg/kg. and the NH3-N to TN ratio was4.84%. The following date was ture for formic acid (F), the ulitimated pH was4.16, and the lactic acid percentage was up to7.25%; NH3-N yield were520mg/kg, and the NH3-N to TN ratio was4.66%. it was further observed that, biological agents (IE) group, the ulitimated pH was3.67, and the lactic acid percentage was up to7.43%; NH3-N yield were650mg/kg, and the NH3-N to TN ratio was4.93%. Also, it decreased the contens of NDF, ADF; increased the contens of WSC in siliage.Taken together, silage with additive of microbial inoculums and cellulose enzyme (IE), could improve the quality of corn straw silage coparatively.Trail2:The evaluations of the digestiabilty of corn silages by arifical rumen tecniqueDM degradability of corn silages with different addictives was investigated using in vitro culture technique. The results show that, the microbial inoculum treatment groups, cellulase treatment groups, formic acid treatment group and biological agents group (microbial inoculum and cellulose enzyme combined processing), and the control group corn silage had a similar change partner of DM rumen disappear rate. The disappear rate all increased rapidly, and reached to a high level at6h after in vitro culture, and then increase smoothly. The disappear rates of DM, and CP in biological agents group were56.66%, and81%respectively. While52.59%and77.83%were right for the DM, and CP in control group. That was to say, degradability of DM of silage from biological agents group were highest, and that of control group was however lowest.Trail3:The effects of corn silages with different additives on the milk perfermance of dairy cattleThe effects of corn silages with different addictives on milk performance and rumen fermentation were carried out by in vivo feeding trail in Wangji town.30cows were selected in this trail, as experimental animals, were randanly didived into2groups with15cows in each. They were feed by the corn silage with IE group, or normal silage (control group) for75days, including15days for pre-experiment period, and60days for experiment. The results show that, corn silage with biological agents could incresae the cow’s milk production, and milk fat tatio in some degree.