Effects Of NCG And Its Combination And Probiotic Preparations On Sow Production Performance

Two experiments were desigened to evaluate the effect the nutritional factors onreproductive performance of sows and growth performance of piglets. One was addedN-carbamoylglutamate (NCG) and NCG-Vc (the mixture of NCG and vitamin C) intothe diet of pregnant and nursing sows to detect its effect on reproductive performanceand stress resistance of sows. Another was oral-fed complex-probiotic-preparationinto the month of newborn piglets to detect its effect on growth performance.1. N-carbamoylglutamate (NCG) and NCG-Vc for reproductive performance of sowsThe effect of N-carbamoylglutamate (NCG) and NCG-Vc addition forreproductive performance, immune function and antioxidant thermal stress resistanceof sows were explored.196of Large White sows were andomly selected with thesame age and parity, which were divided into6groups (n=33) randomly. Theexperiment was conducted from July to August in2012. The average temperature was25.8℃during this period, the average daily maximum temperature was30.2℃, thenumber of days with daily maximum temperature exceed30°C was47days, theaverage humidity was58.5%. Additive feeding experiments was conducted frompregnant detected by B ultrasonic, the last month of pregnant to piglets weaning,respectively, and divided into five experimental groups (A group fed the0.5kg/tonNCG from the pregnant detected by B ultrasonic to weaning, B group fed0.5kg/tonNCG from the last month of pregnant to piglets weaning, C group fed0.5kg/ton NCGfrom delivery to weaning, D group fed0.5kg/tons of vitamin C from the last monthof pregnant to piglets weaning, E group fed0.5kg/tons the NCG+0.5kg/ton of Vcfrom the last month of pregnant to piglets weaning) and control group (no addition).Reproductive performance, immune and anti-stress indicators were measured. Theresults show that:(1) In experiment group, litter size, number born alive, litter weightat birth, newborn weight,21-day age litter weight,21-day weight and21-day survivalrate were greater than control group. Especially in group E, the increasement of thereproductive performance was the most, which had the biggest litter weight andindividuals (p<0.01) in d21, and the number of weaned.(2)Compared with the control group, level of blood malondialdehyde and cortisol levels were low and IgG and heatshock protein70were high in weaning sows. The indicators of group E sows showedgreat difference, mainly displays in the levels of MDA and cortisol in theexperimental group were significantly reduced (p<0.01), which could decreae thegeneration of free radicals and reduce the thermal stress of high temperature on thesows.(3) Feed additive improved the feed intake of the sow in test groups and obtainmore economic benefits as the same time. In addition, NCG, NCG and Vc compositesand Vc addition into dite of pregnant sows could improve reproductive performance,in which group E showed the best. Namely from the last month of pregnant to pigletsweaning add0.5kg/ton NCG and0.5kg/ton vitamin C in the diet of sows couldimprove sow productive performance, immune anti-stress ability and the economicbenefit. NCG and Vc showed synergistic effect to improve reproductive performanceand against heat stress.2. Effect of compound probiotics preparation on growth performance of pigletsThe objective of this study was to investigate the effects of newborn piglets inoral feeding compound probiotics preparation on growth performance and the serumbiochemical and immune index. Randomly assigned the similar number of theexperimental group and the control group when farrowed, the experimental group fedoral feeding probiotic preparations before they eat the colostrum which the controlgroup not added. The growth performances were determined in the certain growingphases, as well as the serum biochemical and immune index in the blood sample oftheir70-day-age. The results showed that:(1) As for piglet, the biggest stressappeared in the period before and after weaning. Feeding the compound probioticspreparation could improve the survival rate of piglets and average daily gainsignificantly (p<0.05).(2)When compared the experimental group with control group,the ratio of albumin and globulin and the pig haptoglobin decreased significantly(p<0.05), Pig γ-interferon levels increased significantly (p<0.05), which shwed theimmunity of the piglet enhanced. Decreasement of the level of serummalondialdehyde in test group showed anti-stress ability of the piglets was inproved. In addition, newborn piglet oral vaccination composite probiotic preparation beforesucking on colostrum can significantly alleviate weanning stress, enhance pigletimmunity and anti-stress ability, improve piglets daily gain on average and thebreeding efficiency.