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对五株假丝酵母菌株进行利用淀粉废水和转化硒元素的筛选试验 ,其中CY - 173菌株所得的蛋白质含量和蛋白态硒总量最多。对其进行耐高温试验 ,在 33～ 45℃范围内 ,菌株都能生长 ,但超过 40℃生长速度开始减缓 ,45℃时明显受到抑制。在 6L标准发酵罐内进行pH与温度条件试验 ,pH在 3～ 5之间 ,菌株生长差异不显著 ;在 33～ 40℃范围内 ,菌株都能较好生长 ,但以 37℃的蛋白质含量与蛋白态硒总量为最高。将所得的硒酵母替代部分鱼粉用于养殖中国对虾 ,结果三组硒酵母饲料 (含 10 %、2 0 %、30 %硒酵母 )的养殖效果均优于对照饲料 ,其中 10 %硒酵母添加量的饲料 (含硒 0 .6× 10 -6) ,其饵料系数最低 ,为 2 .5 6 ,比对照组的 2 .95减少了 13 .3%。
Five Candida strains were screened for their utilization of starch wastewater and conversion of selenium. The total protein content and protein selenium content of CY - 173 strain were the highest. The strain was able to grow in the temperature range of 33 ~ 45 ℃ when its temperature was high, but its growth rate began to slow down when the temperature exceeded 40 ℃, and was obviously inhibited at 45 ℃. The pH and temperature conditions were tested in a 6L standard fermentor at pH between 3 and 5 with no significant difference in the growth of the strains. The strains grew well in the temperature range of 33-40 ° C, but at 37 ° C, The total amount of protein selenium is the highest. The resulting selenium yeast instead of part of the fish meal for the culture of shrimp, the results of three groups of selenium yeast feed (including 10%, 20%, 30% selenium yeast) breeding effect is better than the control diet, of which 10% selenium yeast dosage Feed (selenium 0 .6 × 10 -6), the lowest feedstuff coefficient was 2.56, which was 13.3% lower than that of the control group.