Effects Of Montmorillonite Fed Diets Mouldy Peanut Meal On Production Performance And Health In Broilers

This experiment was conducted with the aim to investigate the alleviation effects of natural and modified montmorillonite and mouldy peanut meal on broiler chicks with regard to growth performance and immunity indexes.A total of 432 one-day-old Arbor Acre(AA) male broiler chicks were randomly divided into 6 groups with 6replicates containing 12 brirds each. The six diets formulated included a corn-soybean meal basal diet(positive control group), a mouldy peanut meal(aflatoxins B1 content1 284.21 μg/kg) to replace part of the soybean meal diet(negative control group) and four contaminated diets supplemented with 1.0 g/kg and 2 g/kg natural montmorillonite and 1.0 g/kg and 2 g/kg modified montmorillonite. Of those, the negative diet was formulated by replacing common soybean meal with 8.8% and12.0% naturally moldy peanut meal for starter and grower.The experiment lasted for42 days. The results showed as follows: compared with the positive control group,AFB1 contaminated peanut meal diet significantly decreased average daily gain(ADG), average daily feed intake(ADFI), percentage of breast muscle and percentage of leg muscle, and the contents of serum protein(P<0.05), and significantly increased the ratio of feed and immune organ indexes at 42 d of age(P<0.05). Compared with the negative control group,the average weight at the 42 d of age, the ADG,ADFI in the early and the whole peroid, percentage of breast muscle and percentage of leg muscle at 42 d, the contents of ALB and GLB in plasma in 2.0g/kg natural montmorillonite groups were significantly increased(P<0.05), and significantly decreased the ratio of feed in the whole period, the thymus indexes and bursa of fabricius indexes(P<0.05).The ADG, ADF, percentage of breast muscle and percentage of leg muscle at 42 d, the contents of serum protein in 1.0 g/kg modified montmorillonite groups were significantly increased(P<0.05), and significantly decreased the ratio of feed in the whole period, the thymus indexes and bursa of fabricius indexes(P<0.05). The ADG,ADFI, percentage of breast muscle and percentage of leg muscle at 42 d, the contents of serum protein in 2.0 g/kg modifiedmontmorillonite groups were significantly increased(P<0.05), and the elevation of the ratio of feed and immune organ indexes was significantly inhibited by 2.0 g/kg modified montmorillonite groups(P<0.05). Compared with the 1.0 g/kg natural montmorillonite group, the ADG and the contents of total protein and albumin in plasma in 2.0 g/kg modified montmorillonite groups were significantly increased(P<0.05), the ratio of feed and the thymus index was significantly decreased in 2.0 g/kg modified montmorillonite group(P<0.05). Compared with the 2.0 g/kg natural montmorillonite group, the ADG in the late, the contents of total protein and albumin in plasma in 2.0 g/kg modified montmorillonite groups were significantly increased(P<0.05). Added in the moudy peanut meal fodder montmorillonite can relieve inflammation of the liver tissue and injury of liver cell structure disorder caused by AFB1, 2.0 g/kg modified montmorillonite get the better effect.In conclusion, AFB1 containing peanut meal decreased the growth performance and immune organ indexes in broilers, and dietary supplementation of natural or modifed montmorillonite could ameliorate the negative effect of aflatoxins, and the2.0 g/kg modified montmorillonite get the better effect.