Study Of Optimal Hybrid Combination And Diet Formula Selection Of Beef Cattle Fed With Total Mixed Diet(TMR) In Ningxia

Although the beef cattle industry in China starts late and starts from a low level,it develops rapidly.Ningxia has a good resource advantage,geographical advantage and cultural environment,which is very beneficial to the production and development of beef cattle,and beef cattle has become a traditional advantageous industry in ningxia.In recent years,the beef cattle industry in ningxia has developed rapidly,and the number of feedings and beef production have increased rapidly.But breeding costs continue to rise,increasing pressure on income.Therefore,to reduce the breeding cost,improve the benefit and beef quality is the inevitable trend to meet the demand of beef cattle industry,and also the main direction of developing modern beef cattle industry.At present,Total Mixed Ration(TMR)feeding technique has been widely applied in ruminant production and has achieved good production results.Relevant researches are also deepening.TMR has the advantages of good nutritional balance,high feed utilization rate,improving animal production performance,preventing digestive system dysfunction and so on.It is one of the important measures for large-scale,intensive production and scientific feeding management of cattle and sheep.Based on total mixed diet(TMR),different cross combinations and nutrition levels of beef cattle were studied in guyuan,ningxia.The first research is about Angus cattle and wood praise and simmental cattle three varieties respectively improved hybrid local cattle produce offspring of F1(15 to 18 months,respectively is set to test ?,? group,? group)short-term fattening effect of contrast test,basic diet consists of whole plant corn silage corn cob powder + + extender for fodder for alfalfa hay + etc,100 d of the trial period.Test weight and main slaughter indicators for test and analysis,the results show that the fattening final average the live weight,total weight and daily gain in fattening period,test ? group respectively 554.10 + /-40.70 kg,163.40 + /-32.06 kg and 1.55 + /-0.25 ?,and were significantly higher than ? and ? group(P < 0.05);Body weight,slaughter rate,rate of net weight and net meat ? than ? group and ? group 7.70%(P < 0.05)and 17.39% respectively(P < 0.01),6.55% and 5.67%(P < 0.01),4.38% and 19.09%(P < 0.01),3.32%(P < 0.05)and 7.01%(P < 0.01);There were significant or very significant differences in carcass length and carcass meat yield,bone weight,meat to bone ratio,fat weight and fat percentage in carcass weight(%).Input and output ratio is also ? above ? group and ? group.The above results indicate that the improved offspring of limousin cattle are the dominant hybrid combination in ningxia.The second research is based on the above research results,to praise the wooden ox of improving offspring F1 hybrid high,medium and low three different nutrient levels(15 ~ 18 months,respectively to test ?,? group,? group)of the diet formula screening test,basic diet for whole plant corn silage +,+ + cod alfalfa hay extender for fodder for cattle,100 d of the trial period.Study found that,from an average of a final weight,total weight and daily gain metrics,test ? group(high trophic level)growing,on average,weighed 1.63 + /-0.33 ?,above ? group(1.58 + /-0.29 kg)and ? group(1.61 + /-0.30 kg),according to the average daily gain a final weight,total weight and sort,for test ? group(high trophic level)> ? group(nutrition)> ? group(low trophic level),the trend of test results,the different nutrition levels,with the portfolio of hybrid cattle fattening effects on different weight.However,the difference between groups was not significant(P >,0.05),which may be related to the insufficient amount of specimens.In terms of economic efficiency,with the increase of fine feed/gain weight proportion,and the corresponding experimental group of beef cattle production increased,but also increases the production cost at the same time,from the head of the group net benefits,new input output ratio and total input of output than three aspects from low to high order for ? group(high trophic level)nutrition level of the()< < ? group ? group(low nutrient levels).The results showed that the results were consistent with the average daily weight gain and nutrient level of daily feed.Therefore,in order to save costs and increase efficiency,we should make full use of the advantageous hybrid beef cattle combination in ningxia region,supplemented by standardized,diversified and scientific dietary formula that can make full use of the local forage advantage.