Study On Modulation High-quality Feed Of Xinsu No.2Sudan Grass

This study used different cuts of Xinsu No.2Sudan grass. After using differenttreatments(natural seasons dry、natural shade dry、natural seasons dry of fracturing stem、natural shade dry of fracturing stem)modulating hay and differentmoisture content(highmoisture、middle moisture and low moisture) silage,and mixture ratio(100:0、75:25、50:50、25:75,called comparison group、test1、test2、test3) and adding previously fermented juices(PFJ) silage (test A、test B、test C and test D),were analyzed in terms of fermentation quality,nutrition and degradation rate in order to provide a scientific basis for effective use of Sudangrass within Northern Xinjiang. This study was divided into the following four parts:First part: the modulation of high quality green hay experimental results showed that inthree cuts of Sudan grass the natural season dry group’s first day of weightlessness rate washigher than shade dry’s（P<0.05), but the natural season dry of fracturing stem group’sweightlessness rate was higher than natural season dry. Among all groups, the natural seasondry of fracturing stem’s weightlessness rate was the highest. The influence of different haydrying processes on the nutrients was not significant（P>0.05). Shade dry group’s carotenecontent was higher than that of natural season dry group. Natural shade dry of fracturing stemgroup’s carotene content was higher than for other processes（P<0.05）.Second part: The modulation of high quality silage experimental results showed that theinfluence of different moisture content on Sudan grass silage fermentation quality issignificant. The sensory evaluation between three cuts with different processing is: middlemoisture> high moisture> low moisture. Between different cuts with same processing ofhigh moisture silage, it is: third cut> second cut> first cut. For cuts of middle and lowmoisture silage, it is: first cut> second cut> third cut. Different moisture content processinghad a significant influence on dry matter and crude protein (P<0.05); the influence on othernutrients was not significant (P>0.05).Third part: The influence of mixture ratio (of Sudan grass and alfalfa), and of addingpreviously fermented juices, on silage quality experimental results showed that the mixtureratio of Sudan grass and alfalfa effectively improved the silage fermentation quality. Test2（50:50）fermentation quality was found to be the best, while test1（25:75）was good.As theportion of Sudan grass in the silage mixture was reduced, and alfalfa increased, the crudeprotein content gradually increased and NDF content gradually decreased.After adding PFJ to the Sudan grass and alfalfa mixture, silage quality effectivelyimproved. The affect of adding PFJ to test C is obvious: PFJ effectively increased eachgroup’s lactic acid content, and reduced butyric acid content (P<0.05). PFJ effectivelyincreased each group’s dry matter content. Impact on other nutrient contents of the groupswas significant (P>0.05).Part four: The influence of different treatments on Sudan grass hay degradation ratewithin the artificial rumen. Results showed that, comparing the72-hour degradation rates ofdifferent treatments of modulated Sudan grass hay, the rate for sun dry group (except the thirdcut) was higher than for the shade dry group (P<0.05), and natural shade dry of fracturingstem group’s rate was higher than natural shade dry group’s rate. Crude protein (except thefirst cut) degradation rate was the same as dry matter, but NDF was opposite.Comparing the degradation rates for different moisture content treatment methods of Sudan grass silage within the artificial rumen, middle moisture content silage’s dry matter (exceptthird-cut, low-moisture silage), crude protein and NDF degradation rates were the highest.For the first, second, and third cuts of low moisture content silage, ADF was significant. Forother treatments it was not significant.The72-hour degradation rates for mixtures with different proportions of Sudan grass andalfalfa within the artificial rumen. As the proportion of Sudan grass decreased, and theproportion of alfalfa increased (in the raw material), the degradation rate of dry mattergradually decreased, while crude protein gradually increased. NDF and ADF increased(except for test1).The influence of adding PFJ to silage mixtures having different proportions of Sudan grassand alfalfa on their72-hour degradation rate was not significant (P>0.05). In addition to testA, other tests’ crude protein and NDF degradation rates increased. Adding PFJ increased testD’s ADF. Other tests’ ADF slightly decreased. Test C (50:50) had the best rate of nutrientdegradation.