大头金蝇营养成分分析

分析大头金蝇Chrysomya megacephala(Fabricius)的营养成分。结果表明,大头金蝇幼虫、蛹、成虫干粉水分含量分别是6.83,2.07和3.70%,干体粗蛋白含量分别为63.72,76.81和70.54%,粗脂肪分别为16.43,12.82和7.23%。蛋白质中氨基酸总量百分比分别为56.39,55.61和59.12%,其中必需氨基酸占氨基酸总量(E%)的48.34,53.08和43.91%,必需氨基酸与非必需氨基酸之比(E/N)分别为0.94,1.13,0.81,E/T为3.22,3.54,2.93。大头金蝇幼虫、蛹、成虫不饱和脂肪酸占总脂肪酸含量依次是68.1,61.9和65.9%。含有人和动物所必需的常量和微量元素,但没有检测到有毒重金属镉(Cd)、铅(Pb)。大头金蝇与鱼粉、舍蝇幼虫、柞蚕蛹相比,营养成分指标较高,属于理想的昆虫蛋白资源。

Determination of nutritional components in Chrysomy megacephala

The nutritional components of Chrysomyia megacephala(Fabricius) were determined.The results showed that the dry contents of C.megacephala larva,pupa and adult were water(6.83,2.07 and 3.70%),crude protein(63.72,76.81 and 70.54%),and crude fat(16.43,12.82 and 7.23%).The total amino acids in the larva,pupa,and adult were 56.39,55.61 and 59.12%,respectively.Essential amino acids(E) accounts for 48.34,53.08 and 43.91% of total amino acids,The ratios of E/N were 10.94,1.13 and 0.81 respectively;E/T were 3.22,3.54 and 2.93,respectively.The unsaturated fatty acids were 68.1,61.9 and 65.9% of the total fatty acids respectively.The nutritional components of C.megacephala larva,pupa and adult contained trace elements and minerals that was essential to human being or animal,but no toxic heavy metals,such as cadmium or plumbum were detected.The index of C.megacephala nutritional components was higher than that of fish meal,housefly and larv ussore pupa.It was a better resource of insect protein.