Wilson H R, Harms R H, Simpson C F, Campbell W R
Poult Sci. 1983 Sep;62(9):1731-3. doi: 10.3382/ps.0621731.
The insect growth inhibitor, Larvadex, was fed to egg type breeder hens for 8 weeks at levels of 0, 50, 100, 500, 1000, and 2000 ppm and to the same strain of males at 0 and 2000 ppm. All birds were kept in individual cages. Fertility was determined following artificial insemination. Egg production was significantly increased in Experiment 1 but numerically decreased in Experiment 2 by feeding 1000 ppm Larvadex. Feeding 2000 ppm significantly decreased egg production in both experiments. Egg weight was highest at 100 ppm and decreased with higher treatment levels. Specific gravity of eggs was improved with all Larvadex treatments. Fertility was not affected by treatment of females or males. Hatchability was reduced by the 1000 and 2000 ppm levels in the hen's diet. Semen quality was not significantly affected by feeding Larvadex at 2000 ppm.
将昆虫生长抑制剂Larvadex以0、50、100、500、1000和2000 ppm的剂量喂给蛋用型种母鸡8周，并以0和2000 ppm的剂量喂给同一品系的公鸡。所有鸡只均饲养在单独的笼子里。人工授精后测定受精率。在实验1中，饲喂1000 ppm Larvadex可使产蛋量显著增加，但在实验2中，产蛋量在数值上有所下降。在两个实验中，饲喂2000 ppm均显著降低了产蛋量。蛋重以100 ppm时最高，且随着处理水平的提高而下降。所有Larvadex处理均提高了蛋的比重。受精率不受对雌性或雄性处理的影响。母鸡日粮中1000和2000 ppm的水平降低了孵化率。饲喂2000 ppm Larvadex对精液质量没有显著影响。
