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我们都知道抗生素在治疗方面已有惊人的成绩,事实上除治疗外,抗生素还有很广泛的用途;例如抗生素利用在植病防治(Welch,1957a;Leben,1954;Zaumeyer,1955),食品保存(Lewis,1954;Welch,1956;Welch,1957b)及动物饲养上都有显著的成果。抗生素中如金霉素,地霉素,青霉素,枯草杆菌多胜素(becitracin),链霉素等都证明能促进小猪、小牛和禽类等生长速度。抗生素这种生长作用,是指显然健康的幼小动物的生长,因在已含有足量的各种营养因子的饲料中,加入少量的抗生素(2—10ppm到50—200ppm)的增快而言。应指出的是抗生素对成
We all know that antibiotics have achieved phenomenal success in treatment. In fact, antibiotics have a very wide range of uses besides treatment; for example, the use of antibiotics in the control of plant diseases (Welch, 1957a; Leben, 1954; Zaumeyer, 1955) (Lewis, 1954; Welch, 1956; Welch, 1957b) and animal husbandry. Antibiotics such as chlortetracycline, gemcitabine, penicillin, beitracin, streptomycin and so on have proved to promote the growth of piglets, calves and birds and other growth. The growth effect of antibiotics refers to the growth of apparently healthy young animals due to the rapid addition of small amounts of antibiotics (2-10 ppm to 50-200 ppm) to feeds that already contain sufficient amounts of various nutritional factors. It should be noted that antibiotics into