Effect of Alum-Amended Litter and Stocking Density on Ammonia Release and Footpad and Hock Dermatitis of Broilers

作     者：ZHANG Hong-fang JIAO Hong-chao SONG Zhi-gang LIN Hai 

作者机构：Department of Animal Science Shandong Agricultural University Tai＇an 271018 P.R.China 

出 版 物：《Agricultural Sciences in China》 (中国农业科学（英文版）)

年 卷 期：2011年第10卷第5期

页      面：777-785页

核心收录：

学科分类：090801[农学-水产养殖] 0908[农学-水产] 07[理学] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学] 

基　　金：supported by the National Natural Science Foundation of China (30771573) the Natural Science Fund for Distinguished Young Scholars of Shandong,China (2008JQB01001) 

主　　题：ammonia stocking density litter alum broilers 

摘      要：Two experiments were conducted to evaluate the effect of alum on ammonia emission,live performance,and health of *** experiment 1,the effect of alum （0,2,and 4%） supplementation on the emission of ammonia was *** effects of alum-treated litter and stocking density （12,16,and 20 birds m-2） on the live performance and incidence of footpad and hock dermatitis were investigated in experiment *** supplementation in chicken excreta significantly decreased pH from 8.06 to 5.27 and 3.62 by 2 and 4% alum treatments,*** emission rate was reduced 73.0 and 75.8% by 2 and 4% alum treatments,*** suppressed litter urease activity was detected in 4% alum ***-amended litter （1 kg m-2） decreased atmosphere ammonia concentrations by 30% in broiler ***-amended litter maintained a lower pH until 35 d of *** weight （BW） gain was decreased by alum treatment in the period of 4-7 wk of *** stocking density （20 birds m-2） increased BW gain in the first 3 wk of age but decreased BW gain during the period of 4-7 wk of *** alum nor stocking density treatments had a significant effect on feed intake and feed ***-treated litter had no detrimental effect on the development of footpad and hock *** contrast,high stocking density （20 bird m-2） increased the incidence of footpad and hock *** result suggests that the decreased litter pH and suppressed bacterial urease activity by alum treatment is responsible for the decreased ammonia *** high stocking density,the increased litter moisture content should be responsible,at least partially,for the development of footpad and hock lesions.