Odongo N E, Plaizier J, van Straaten P, McBride B
Kenya Agricultural Research Institute, Muguga, PO Box 30148, Nairobi, Kenya.
Trop Anim Health Prod. 2002 Jul;34(4):349-58. doi: 10.1023/a:1015690920578.
Three hundred, day-old broiler chicks, with an average initial weight of 41.8 +/- 1.79 g, were used in a 15-day study (10 birds per battery cage) to characterize their performance and fluorine status when dicalcium phosphate (DCP) was replaced by Busumbu rock phosphate (BRP) as the source of phosphorus in the chicks' ration. The treatments comprised a standard ration with BRP replacing 0, 25%, 50%, 75% or 100% of DCP. Replacing DCP with BRP significantly reduced the final weight of the chicks (p < 0.01), feed intake (p < 0.01), weight gains (p < 0.01) and dry matter digestibility (p < 0.05) but increased (p < 0.05) the feed-to-gain ratio. True phosphorus absorption and the percentage of phosphorus in the tibia were not affected by increasing amounts of BRP in the diet. Increasing levels of BRP in the diet linearly reduced (p < 0.01) the percentage bone ash, calcium, Ca:P ratio, ultimate breaking force, bending moment, stress, and modulus of elasticity. Leg stiffness, lameness, reduced feed intake, and a decline in general health were recorded in 10-40% of the chicks on 75% and 100% BRP, respectively. These results suggest that excessive ingestion of fluorine from the BRP caused the reduction in the chicks' performance.
选用300只1日龄的肉仔鸡（平均初始体重为41.8±1.79克）进行一项为期15天的研究（每个电池笼饲养10只鸡），以研究在雏鸡日粮中用布苏木磷矿石（BRP）替代磷酸氢钙（DCP）作为磷源时它们的生长性能和氟状况。处理组包括用BRP分别替代0%、25%、50%、75%或100%的DCP的标准日粮。用BRP替代DCP显著降低了雏鸡的终末体重（p<0.01）、采食量（p<0.01）、体重增加量（p<0.01）和干物质消化率（p<0.05），但提高了（p<0.05）料重比。日粮中BRP添加量增加对真磷吸收率和胫骨中磷的百分比没有影响。日粮中BRP水平的增加使骨灰百分比、钙、钙磷比、极限断裂力、弯矩、应力和弹性模量呈线性降低（p<0.01）。分别有10%-40%采食75%和100%BRP日粮的雏鸡出现腿部僵硬、跛行、采食量减少和总体健康状况下降的情况。这些结果表明，从BRP中过量摄入氟导致了雏鸡生长性能的下降。
