Effects Of Fermented Corn Straw On Performance, Energy Metabolism And Nitrogen, Carbon Deposition Of Fattening Sheep

This experiment was conducted to investigate the effects of fermented corn straw onperformance, energy metabolism and Nitrogen, carbon deposition of sheep. Nine Xinjifine-wool sheep with body condition good, with3replications per group,2chickens ineach replicate. The experimental included three periods, sheep in the control group werefed a basal in each period, those in the experimental group were fed the experimental dietwhich replaced50%fermented corn straw with corn straw in each period, and the hungerstrike group. Using the feeding trial, growth and metabolism test and fasting metabolictests, research the effects of fermented corn straw on performance, energy metabolism andnitrogen, carbon deposition of sheep. Pre-feeding period10d, a positive trial period45d,test per15d for a period, respectively, measured energy metabolism, nitrogen, carbondeposition.The results showed as follows: Compared with the control group, the experimentalgroup daily gain increased by46.64%(P <0.05). Dry matter digestibility the test groupthan the control group, respectively, increased by9.60%,5.42%and7.05%. Differentstages of fine-wool sheep, the test group and the control group intake differences betweennitrogen levels was not significant (P>0.05); Fecal nitrogen1period and2the test groupwas significantly less than the control group (P <0.01); but the3period the difference wasnot significant (P>0.05); Urinary nitrogen between the experimental group and controlgroup difference was not significant (P>0.05); Apparent nitrogen digestibility test groupthan in the control group were increased by15.57%,17.08%and12.21%(P <0.01);Nitrogen deposition test group were increased by69.87%,97.87%and70.13%(P <0.01);Total nitrogen utilization test group were increased by53.43%,86.04%and34.29%(P<0.05). Fecal carbon test group higher than that of the control group, the difference wassignificant (P <0.05); Urine carbon between the two groups, the difference was notsignificant (P>0.05); Digestible carbon test group was significantly higher (P <0.05); Thedeposited carbon test group than in the control group were increased by69.77%,47.02%and29.48%(P <0.01); Carbon of the the digestibility test group than the control groupincreased by7.26%,8.00%,4.95%(P <0.05); Methane emissions in the three test groups than in the control group were reduced by20.95%,23.83%,21.49%. Digestible energy testgroup in1period a very significantly higher than those in the control group (P <0.01), butin2period and3period, the experimental group was significantly higher than that in thecontrol group (P <0.05); Methane energy and methane energy proportion of the totalcapacity of the test group were significantly higher than those in the control group (P<0.01); Heat production was no significant difference between the two groups (P>0.05);The metabolic energy experimental group were significantly higher than those in thecontrol group (P <0.05); Total energy digestibility in first period, second period and thirdperiod test group than in the control group were increased by10.33%,11.52%,11.86%,significant difference (P <0.05); Total energy metabolic rate between the test group andthe control group first increased by11.18%, the difference was not significant (P>0.05),the second and the third period of test group than in the control group were increased by22.66%,17.19%, significant difference (P <0.05); Feed net energy test group the threeperiod than in the control group were increased by64.29%,108.1%,84.90%feed,significant difference (P <0.05). Shows that the fermentation of straw can improve thegrowth performance of sheep mainly improve average daily gain, dry matter digestibility,nitrogen, carbon deposition, and energy deposition.The results of this study for the first time using open breathing effect of fermentedstraw feed for fattening sheep energy metabolism and carbon, nitrogen deposition of heatmeasuring device, the fermentation of straw feed feed net can, theoretically revealsfermentation of straw feed to promote growth mechanism of sheep breeding, and provide atheoretical basis for the popularization and application of fermentation of straw feed infattening sheep in, which provides the scientific basis for the breeding of high efficientfood in fattening sheep.