[目的]研究1株高产蛋白饲料菌株的选育及生物学特性.[方法]以较高产蛋白饲料菌株S4.1为出发菌株,进行紫外线诱变,获得1株高产蛋白饲料菌株S4.107,研究其生物学特性及培养方法.[结果]S4.107生长速度快.粗蛋白含量达到27.31%.S4.107最佳生长时间为26 h,最适生长温度为30℃,最适生长pH值为7,适宜的碳源为6‰蔗糖和10‰葡萄糖,适宜的氮源为8‰的酵母浸出汁和10‰蛋白胨.[结论]利用自然突变和人工紫外线诱变相结合的方法.可获得高产蛋白菌株.%[ Objective ] To study breeding and biological characteristics of a strain of high yield protein feed bacteria. [ Method ] S4.1 as a starting strain was a strain of relatively high yield protein feed bacteria. A high yield protein bacteria strain S4. 107 was gained by carrying ultraviolet mutagenesis on S4. 1. Then breeding and biologicakl characteristics of S4. 107 was studied. [ Result]S4. 107 grew fast,and its crude protein content was 27.31％. The optimum growth time of S4. 107 was 26 h,optimum growth temperature was 30 ℃ ,optimum growth pH was 7 ,optimumcarbon source was 6‰ sucrose and 10‰ dextrose,optimum nitrogen source was 8‰ yeast extract and 10‰ prptone. [ Conclusion] Using combination of natural mutation and artificial ultraviolet mutagenesis,high yield protein bacteria strain could be gained.
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