Silage Characteristics Of Main Plant And Community On Typical Steppe

The forage and the silages were collected from57sites in4cities (Xingan, Tongliao, Chifeng,Xilinguole) in order to learn the silage characteristics of main plant and community on Typical Steppe.The species of lactic acid bacteria, the nutrition composition of forage and the fermentation quality ofsilages were studied. The results are as follows:1. The counts of lactic acid bacteria in silages were larger differences (103cfu/g~108cfu/g).462strains of lactic acid bacteria were isolated from the silages, in which210strains were coccus,252strains were bacillus. Those strains were identified as8genuses and35species. The main genuses wereEnterococcus (130strains,29.35%), Lactobacillus (107strains,24.15%), Pediococcus (109strains,24.61%). The main species were E. faecalis (77strains,17.38%), P. pentosaceus (67strains,15.12%), L.plantarum (53strains,11.96%) and L.mesenteroides subsp. Mesenteroides (50strains,11.29%).2. The CP contents of community forage were between7.11%and16.61%, the average was11.74%;the BC between74.79mE/kg and376.91mE/kg, the average203.52mE/kg. The CP contents ofLeymus chinensis were between8.48%and17.13%, the average was12.72%; the BC between126.48mE/kg and304.03mE/kg, the average226.542mE/kg. The CP contents of Stipa were between7.37%and12.92%, the average was9.04%; the NDF between69.88%and75.53%，the average72.89%.The CV sequence of nutrition compositions in single forage were WSC> BC> CP> DM> fibercomponent.3. The pH of the community silages were between4.32and7.45, the average was5.56; the LAbetween0%and4.18%, the average0.59%; the AN/TN between0.59%and32.48%, the average5.93%;the success rate of ensiling was82.46%. The pH of the Leymus chinensis silages were between4.52and7.73, the average was5.91; the LA between0%and2.58%, the average0.51%; the AN/TN between0.72%and26.73%, the average3.63%; the success rate was92.59%. The pH of the Stipa silages werebetween4.72and6.74, the average was6.02; the LA between0.02%and0.82%, the average0.27%; theAN/TN between0.57%and3.85%, the average1.98%; the success rate was100%. The success rate ofensiling could be improved by adjusting DM contents (>30%) of forage.4. The fermentation of ensiling could increase the CP contents of Gramineae forage (P＜0.05), andhad no effects on the CP contents of community and Leguminosae forage (P＞0.05). The fermentationcould decrease the NDF and HC contents of community forage and Leguminosae forage (P＜0.05),which indicated that the NDF contents were decreased by reducing the HC contents5. The attitude of sites had negative correlation with the WSC contents of community and Gramineaeforage (P＜0.05), the elevation of sites had positive correlation with the WSC contents of communityforage (P＜0.05). The correlation analysis results based on the fresh weight were better than the drymatter. The attitude of sites had negative correlation with fermentation quality of silages; the elevationof sites had positive correlation with fermentation quality of silages. The WSC contents of communityforage and Gramineae forage had positive correlation with pH, and negative correlation with lactic acid contents and AN/TN of silages.