| In this paper,the nutritive value of whole plant wheat without adding bacteria,adding lactic acid bacteria and adding compound bacteria for 3 weeks,6 weeks and 9 weeks was studied,the storage effect of whole plant wheat in different harvest periods was compared,and the effects of whole plant silage wheat on the fattening pigs were studied.Study on storage effect of whole plant wheat:Wheat when 8 to 10 days before harvest was reaped,and the whole plant wheat was crushed,then the whole plant wheat was packaged and silage.During silage,wheat was randomly divided into three equal parts.One is not sprayed,one is sprayed with lactobacillus,and one is sprayed with compound bacteria.After 3,6 and 9 weeks of storage respectively,five point sampling method was used to determine the content of PH and nutrients.The results show that:There was great significant difference in the PH、the contents of dry matter,crude ash,crude fat,crude protein,crude fiber and neutral detergent fiber of the whole plant silage wheat with no bacteria,lactic acid bacteria and compound bacteria at 3 weeks(P<0.01),and the content of acid detergent fiber was significantly different(P<0.05).The contents of nutrients were great significantly different at 6 weeks and 9 weeks(P<0.01).The contents of nutrients of whole plant wheat at 3 weeks,6 weeks and 9 weeks after silage and before ensiling with no bacteria,lactic acid bacteria and compound bacteria were extremely significant different(P<0.01).Study on silage effects of whole plant wheat at different harvest stages:The wheat was cut 5 cm away from the ground according to the five point sampling method at 18 days before the wheat harvest.The wheat was wrapped and silage after harvesting,the whole plant silage wheat harvested at different harvest times was sampled and determined,and the silage effects of whole plant wheat with different harvest time were compared.The results show that:there were great significant differences in PH and the content of nutrients,air dried yield,dry matter yield,crude protein yield and crude fat yield of whole plant silage wheat at different harvesting stages(P<0.01).Study on the influence of the whole plant silage wheat on the production performance of the Wenxin black fattening pig:120 WenXin black fattening pigs were randomly divided into 2 groups with 6 replicates per group.The control was provided with basal diet,and the experimental group replaced the basal diet with 14%of the wheat.Initial weight and final weight were measured,average daily gain and the feed to gain ratio was calculated.The results show that:the final weight of the test group was 5.8%higher than that of the control pigs,the average daily gain was significantly higher than that of the control group(P<0.05),the feed to gain ratio was significantly lower than that of the control group(P<0.05).24 pigs with similar weight were randomly divided into 2 groups.The control group was fed with basal diet,the experimental group was substituted by 20%and 40%of the whole plant wheat silage at the early and late stage of the experiment.The results show that:The average daily gain and average daily intake of the control pigs were significantly higher than those of the experimental group by adding 20%whole plant silage wheat to the fattening pigs(P<0.01),while the weight ratio of the experimental group was significantly higher than that of the control group(P<0.01).The average daily gain,average daily intake and material weight ratio of the control pigs were higher than those of the experimental group(P<0.01)by adding 40%whole plant silage wheat to the fattening pigs.The suet ratio of test group was significantly lower than the control group(P<0.05),the dressing percentage and backfat thickness was significantly lower than the control group(P<0.01),and the eye muscle area,the weight of the stomach and small intestine,the muscle PH and the a*value in the experimental group were significantly higher than the control group(P<0.05).In summary,adding lactic acid bacteria and compound bacteria can accelerate silage process,the whole plant silage wheat showed the best effect with addition of compound bacteria,the optimum harvesting time of whole plant silage wheat was 16 days before harvest.The Winxin black pig was highly receptive to 14%of the whole plant silage wheat added to the diets,which can increase daily gain and decrease feed to weight ratio of Winxin black pigs.The addition of whole plant silage wheat increased the volume of the stomach and small intestine of fattening pigs,and improved the carcass performance and meat quality of the experimental pigs. |
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