layingperformance相关论文
Effect of dietary supplementation of bacteriophage on laying performance,egg quality,and cecal micro
Dietary bacteriophage (BP) has gained increasing attention as a modulator for intestinal microbial population of animals......
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半开放式鸡舍各层次间的光照强度差异极显著，上，中下，层的平均光照度分别为：８１．９．４０．５和２２．６勒克斯，各层次间不同光照强度对蛋鸡平均产蛋率，平均蛋重显......
