摘要
用氧化铬指示剂法测定了草鱼对营养盐钙、磷的表观利用率。钙利用率:乳酸钙81.3％,碳酸钙26.4％,磷酸二氢钙69.7％,磷酸氢钙39.9％,磷酸钙0.0;磷利用率:磷酸二氢钠90.3％,磷酸二氢钙90.3％,磷酸氢钙60.3％,磷酸钙2.8％。钙、磷利用率随着营养盐溶解度的增大而增高。对于(鱼是)鱼粉、豆麸粉、花生麸粉、玉米粉和麦麸粉的钙、磷、镁、铁表观利用率研究结果表明:草鱼能有效地利用天然饲料中的镁和磷,但是几乎不能利用铁和钙。因此,为了满足草鱼生长对无机盐的需要,则必须在人工饲料中添加钙和铁。
Availabilities of calcium and phosphorus in nutritive salts for grass carp, as determined by the chromic oxide indicator method, were as follows: (Ⅰ) availabilities of calcium: 81.3% in calcium lactate, 26.4% in calcium carbonate, 69.7% in monobasic calcium phosphate, 39.9% in dibasic calcium phosphate, and O in tribasic calcium phosphate; (2) availabilities of phosphorus: 90.3% in monobasic sodium phosphate, 90.3% in monobasic calcium phosphate, 60.3% in dibasic calcium phosphate, and 2.8% in tribasic calcium phosphate. The results of the experiment indicated that the availabilities of Ca and P were directly proportionate to the solubility of nutritive salts. Availabilities of calcium, phosphorus, magnesium, and iron contained in anchovy fish meal, dehulled soybean meal, peanut meal, ground corn and wheat middlings were also studied. Results showed that magnesium and phosphorus in the natural feeds could be utilized effectively by grass carp, but iron and calcium could scarcely be absorbed. Thus, in order to satisfy the mineral needs for the growth of grass carp, calcium and iron should be added to the diet.
出处
《水生生物学报》
CAS
CSCD
北大核心
1990年第2期145-152,共8页
Acta Hydrobiologica Sinica
关键词
草鱼
饲料
利用率
Grass carp, Dietary, Availability
