| In this experiment,Chinese Academy of Sciences division No.1 hybrid Broussonetia papyrifera cultivated by the Chinese Academy of Sciences was selected as the test material.Through the establishment of different cultivation management measures and the repeated design of multiple points in the region,we explored and improved on the basis of ecological adaptability.The biological yield of hybrid Broussonetia papyrifera widely verifies its ecological adaptability under different site conditions in Ningxia.At the same time,a test for the preparation and modulation process of hybrid Broussonetia forage processing and beef cattle diet formulation and feeding experiments were set up to study the hybridization of Broussonetia papyrifera.Methods,feeding effects and economic benefits;this paper uses the method of theoretical model analysis to further demonstrate the feasibility of hybrid framing tree as a new type of woody feed in Ningxia.Through two years of experimental exploration,the following experimental results were obtained:1.The results of the introduction and planting experiments show that the hybrid Broussonetia can grow in different ecological regions in the Ningxia Yellow River Irrigation Area,the desert area,and the central arid area.Its plant survival rate,winter survival rate,biological yield and soil fertility level,water content,The temperature is positively correlated,especially the timely irrigation and fertilization required for the growth of hybrid Broussonetia papyrifera can significantly improve the survival rate of planting,the survival rate of overwintering and the biological yield.Cultivation technology experiments have shown that planting density is also an important factor that affects biological yield.Proper planting density at an early stage can increase biological yield.The cutting time has a great influence on the nutrient content of the hybrid Broussonetia papyrifera.After testing and analysis,it was found that the nutrient characteristics of different cutting time:First,the crude protein content is related to the harvest time.The crude protein content harvested in early September in Longde County reached 9.38%,3.09 and 2.23 percentage points higher than those harvested in August and October;acidic and neutral detergent fibers were 7.28 and 23.15,5.66 and 8.18 percentage points lower than those harvested in August and October,respectively.Second,the content of crude protein and crude fat in the leaves of hybrid Broussonetia papyrifera was significantly higher than that of branches.The average value of crude protein multi-points in leaves was 12.95%and the maximum value was 16.39%.%,The maximum value is 5.63%;the multipoint average content of crude fat in leaves is 2.87%,the maximum value is 5.35%;the multipoint average value of crude fat in young shoots is 0.90%,the maximum value is 1.46%.The third is that the difference between the crude protein and crude fat of the hybrid cultivars between different planting areas is not large.According to the test data,except for Longde County,which is lower than the average and has a large gap with the maximum,the numerical difference between the other test points Not large,but the calcium content of Longde County is significantly higher than the other test points,which is 2.5 times the lowest value of Helan County.2.The results of feed processing,modulation and feeding experiments showed that hybrid fraternal tree as a high-quality feed material has a certain role in alleviating the shortage of protein feed resources in Ningxia and reducing the breeding cost.In this project,the existing harvesting and feed processing machinery is used to explore the processing and modulation techniques for making Broussonetia papyrifera and silage fodder by hybridizing the tender branches and leaves of the Broussonetia papyrifera,and a set of processing and modulation techniques for hybrid Brossonegrass powder and silage are initially explored.At the same time,the processed feed was studied for the diet formula of beef cattle,and the dietary formula of beef cattle added with Broussonetia papyrifera powder and Broussonetia silage was selected for feeding test.The feeding test results show that the hybrid tree feed has a significant effect on the daily weight gain of beef cattle,but compared with the conventional feed for economic benefits,although it has a significant weight gain effect on beef cattle,it is limited by processing machinery and the hybrid tree The characteristics of high bark fiber content make the processing and modulation difficult and costly,making its comprehensive benefits still inferior to the whole plant corn silage.Based on the results of introduction,feed processing and feeding experiments,this paper also analyzes the application prospects of hybrid Broussonetia papyrifera as protein feedstock in Ningxia,and proposes that hybrid Broussonetia papyrifera can be used as an ecological greening tree species in Ningxia,and is recommended as papermaking and high-end textiles.The development of fiber raw materials involves the feed industry.It can currently be used as a supplement to feed materials,and it cannot replace traditional roughage... |
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