Comparative Study On The Effect Of Dairy Cows Fed Diets Differing In Corn Silage And Rice Straw Silage Concentrate-to-forage Ratios

Straw silage has a lot of advantages, such as palatability of low-cost, preservation of material sources and a long period. Our province rice straw is rich, rice straw used for silage can be rich silage raw materials. Straw feeding development and utilization of resources for people and livestock is an easing of China's grain contradictions, and guarantee the sustainable development of animal husbandry an effective way. Straw as a stalk feed, as a ruminant feed resources for less than 15 percent, most are simply burned, not only pollute the environment, but also brought about a lot of waste. The application of rice straw silage has been gaining more and more the attention of the people. To this end, the pilot selection of rice stalks (NEAU 03-28) and lactic acid bacteria additive materials for the trial. To explore the effect of digestion and metabolism and the production performance by rice straw silage, according to experimental design, in the rice stalks of fresh add lactobacillus for silage. At the same time and conventional corn silage compared experiments. The test chose lactating dairy cows, the use of low-cost rice stalks for silage to test digestion and metabolism and production performance, to explore its in lactating dairy cows in the process of rational use of methods. For the economic benefits of low-yielding dairy cows provided a good reference. Aimed at finding rice straw silage in the diet of in the appropriate amount.This test was divided into two parts. Tests one was the digestion and metabolism, Tests two was the production performance of the experimental.Test one selected six healthy cattle, divided into three groups, using rice straw silage for roughage, using 3×3 on the test than the three different diets raise test, three different concentrate-to-forage ratios: processingⅠ(5:5), processingⅡ(4:6), and processingⅢ(3:7). The results show that: (1) from the apparent digestibility, feeding cattle with processingⅡdiet dry matter digestibility was not significant difference (p>0.05) compare to processingⅠandⅢ, processingⅠandⅢwas significant differences (p<0.05); feeding cattle with processingⅠ,Ⅱdiet crude protein digestibility cattle significantly (p<0.05), but no significant difference between the two groups (p>0.05); feeding cattle with processingⅠ,Ⅱ,Ⅲdiet NDF digestibility was not significant difference (p>0.05); feeding cattle with processingⅠ,Ⅱ,Ⅲdiet ADF digestibility was not significant difference (p>0.05). (2)From the nitrogen metabolism, feed three different groups diets pilot nitrogen utilization of cattle there was not significant difference (p>0.05). The comprehensive test of the indicators measured by the three different rice straw silages concentrate-to-forage ratios that to processingⅠ, processingⅡwere better than processingⅢ.Second selected eight healthy cattle. Test using 4×4 Latin square design of experiment, respectively used rice straw silage and corn silage for the two silages expected roughage, and choose different concentrate-to-forage ratios as four treatment groups. Rice straw silage groups respectively selected 4:6 (Ⅰ) and 5:5 (Ⅱ), corn silage groups were selected 3:7 (Ⅲ) and 4:6 (Ⅳ). The results showed that: (1) ProcessingⅠand processingⅢon milk production difference was not significant (p>0.05), processingⅡand processingⅣon milk production difference was not significant (p>0.05), the other treatment groups'milk production difference was significant (p<0.05). (2)All the treatment groups'milk composition(Fat, milk protein, lactose, etc.) are not significant difference (p>0.05). (3)Four treatment groups'economic benefits were significantly (p<0.05), When the milk production in similar circumstances, rice straw silage groups is higher than corn silage groups.