in this paper, the effects of sodium humate on laying performance of nick(parent stock) egg genus chicken aged 48 weeks was studied.
为研究腐植酸钠对蛋种鸡生产性能的影响,选用48周龄尼克红父母代蛋鸡进行试验。
effect of high-level zinc ration on laying performance of laying ducks and zine content of duck egg and duck egg quality;
本试验旨在研究耐热植酸酶对蛋鸭血清指标、骨骼质量和营养物质利用的影响。
the results were as follows: the laying performance and feed efficiency were improved significantly (p0.05)with sbp;
结果表明:添加大豆肽可显着提高蛋鸡产蛋率和饲料转化效率(p0.05);