Study On The Nutrition Value And Effect Of Caragana On Productive Performance In Holstein Heifers

Fifty-four rearing Holstein dairy cows with similar body weight and in good healthy were chosen and randomly allocated into nine treatments groups with six cows of each according to a completed randomized block design to examine the effect of Caragana korshinskii on DM intake, average daily gain and feed conversion efficiency of cattle. Treatment one were fed blooming and rubbing Caragana korshinskii, treatment two were fed blooming and shattering Caragana korshinskii, treatment three were fed blooming and cutting Caragana korshinskii, treatment four were fed seedpod and rubbing Caragana korshinskii, treatment five were fed seedpod and shattering Caragana korshinskii, treatment six were fed seedpod and cutting Caragana korshinskii, treatment seven were fed old branch and rubbing Caragana korshinskii, treatment eight were fed old branch and shattering Caragana korshinskii, treatment ten were fed old branch and cutting Caragana korshinskii. Three oxen with similar age and weight with permanent rumen fistula were chosen and randomly allocated into ten treatments to examine the effects of Caragana korshinskii on nutrients digestibility, nutrients conversion efficiency and rumen degradable rate.The results showed that:Firstly, the content of NDF and ADF were declined, the content of CP,EE,OM and NFE were raised from blooming to seedpod. Old branch were lower than blooming or seedpod Caragana korshinskii.Secondly, the degradability of DM, OM and CP in blooming were higher than seedpod and old branch significantly, seedpod was higher than old branch significantly. The degradability of NDF and ADF in blooming were not significantly higher than seedpod, but higher than old branch significantly.Thirdly, apparent digestibility of OM, CP, NDF and ADF of Caragana korshinskii in blooming were higher than seedpod, but not significantly, were higher than others significantly.Fourth, the DMI of Caragana korshinskii and diet per kilogram metabolic weight of seedpod was the highest, and cutting was highest. The rate of intake of Caragana korshinskii of seedpod and shattering was the highest.Fifth, ADG of cattle fed blooming Caragana korshinskii was 0.844kg, seedpod was0.879 kg, old branch was 0.838kg. ADG of cattle fed rubbing Caragana korshinskii was 0.838kg, shattering was 0.863 kg, cutting was 0.786kg.Sixth, the ratio of concentrate and ADG in blooming was 3.65, seedpod was 3.58, and old branch was 3.94. The ratio of concentrate and ADG by rubbing was 3.69, shattering was 3.58, and cutting was 3.97.Seventh, the cost of per kg daily gain of Caragana korshinskii in seedpod was the lowest. The profit per cattle per day of Caragana korshinskii in seedpod was the highest(l .496 Y).The results suggest that the best reapping period of Caragana korshinskii was in seedpod, the best processing method was shattering, and the development and utilization of Caragana korshinskii will be product better economic benefits, social benefits and ecological benefits.