Dufour L, Sander J E, Wyatt R D, Rowland G N, Page R K
Department of Avian Medicine, University of Georgia, Athens 30602.
Avian Dis. 1992 Oct-Dec;36(4):1007-11.
One-day-old broiler chicks were housed on litter treated with 0, 0.9, 3.6, or 7.2 kg of boric acid per 9.3 m2 of floor space. After 15 days, average body weights were 340.7 g, 278.1 g, and 213.2 g for chickens exposed to 0, 3.6, and 7.2 kg boric acid/9.3 m2, respectively (P < or = 0.05). Feed conversion was 1.68 and 2.29 in chickens exposed to 0 and 7.2 kg boric acid/9.3 m2 (P < or = 0.05). In a second experiment, after birds ingested feed treated with 2500 and 5000 ppm of boric acid for 2 weeks, body weights were 254.8 g and 149.6 g, respectively. The chickens in the control group weighed an average of 285.0 g (P < or = 0.05). The 5000 ppm treatment group had a feed conversion of 1.70, vs. 1.45 in the controls (P < or = 0.05). A dose-related feathering abnormality was evident in treated chickens. No significant histopathologic changes were observed. Livability, weight gain, and feed conversion were not adversely affected in broilers as a result of exposure to litter treated with boric acid at recommended levels of 0.4-0.9 kg/9.3 m2.
一日龄的肉鸡雏鸡饲养在每9.3平方米地面空间分别用0、0.9、3.6或7.2千克硼酸处理过的垫料上。15天后，暴露于0、3.6和7.2千克硼酸/9.3平方米的鸡的平均体重分别为340.7克、278.1克和213.2克（P≤0.05）。暴露于0和7.2千克硼酸/9.3平方米的鸡的饲料转化率分别为1.68和2.29（P≤0.05）。在第二项实验中，鸡摄入含2500和5000 ppm硼酸的饲料2周后，体重分别为254.8克和149.6克。对照组鸡的平均体重为285.0克（P≤0.05）。5000 ppm处理组的饲料转化率为1.70，而对照组为1.45（P≤0.05）。在处理过的鸡中明显出现了与剂量相关的羽毛异常。未观察到明显的组织病理学变化。暴露于推荐水平0.4 - 0.9千克/9.3平方米硼酸处理过的垫料，并未对肉鸡的存活率、体重增加和饲料转化率产生不利影响。
