Effects on growth, nutrient apparent metabolic rate and digestive enzyme activity of broilers by adding antibiotic and Berberis extract were studied.

研究了日粮中添加抗生素或不同剂量三颗针提取物对肉仔鸡生长、养分表观代谢率和部分消化酶活性的影响。

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In 1867 James Clerk Maxwell, a British researcher, wondered if you could extract useful energy from thin air, in apparent contradiction to the second law of thermodynamics.

1867年，大不列颠研究员James Clerk Maxwell想知道能否从稀薄的空气里提炼出有用的能量。这明显与热力学第二定律相矛盾。

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The results showed as follows:compared with the control group, diets added 4% to 20% cassava meal had no significant effect on apparent digestibility of ether extract and calcium of tilapia (P>0.05);

结果表明：与对照组相比，饲料中添加4%~20%木薯粉对罗非鱼粗脂肪和钙的表观消化率均无显著影响（P>0.05）；

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