金银花尺蠖幼虫粪便营养成分分析

  目的  了解金银花尺蠖Heterolocha jinyinhuaphaga幼虫粪便的主要营养成分，评价其营养价值。  方法  采用国家标准检测方法，测定金银花尺蠖幼虫粪便主要营养成分质量分数，分析金银花尺蠖幼虫粪便的氨基酸分、必需氨基酸指数(I_EAA)、必需氨基酸与非必需氨基酸的比值、不饱和脂肪酸与饱和脂肪酸的比值，并与常见虫茶进行比较分析。  结果  金银花尺蠖幼虫粪便的水分、总糖、粗脂肪及蛋白质质量分数分别为10.08%、2.40%、2.73%和11.89%；总氨基酸为 4.326 9 mg·g–1，必需氨基酸总量为 1.666 2 mg·g–1，必需氨基酸占总氨基酸的比例为38.51%，必需氨基酸与非必需氨基酸的比值为62.62%，I_EAA为1.20，不饱和脂肪酸质量分数为64.05%，其不饱和脂肪酸(P)与饱和脂肪酸(S)的比值(P/S)为1.78，必需脂肪酸质量分数为30.49%；矿物元素钙、钾、镁的质量分数较高，分别为8.126 7、4.955 6和3.257 3 mg·g–1，铜质量分数最低，为0.053 8 mg·g–1；维生素C和维生素E的质量分数分别为0.387 5和0.158 3 mg·g– 1。  结论  金银花尺蠖幼虫粪便营养丰富，适宜作为一种新的虫茶进行开发利用。表5参22

Analysis of nutrients in larva feces of Heterolocha jinyinhuaphaga

  Objective  This study aims to understand the nutritional content in larva feces of Heterolocha jinyinhuaphaga, and evaluate its nutritional value.  Method  By using national standard test method, the nutritional content in larva feces of H. jinyinhuaphaga were determined, and the amino acid content, index of essential amino acid (I_EAA), ratio of essential amino acid to nonessential amino acid, and ratio of unsaturated fatty acid to saturated fatty acid(P/S) in larva feces of H. jinyinhuaphaga were analyzed and compared with those of common insect tea.  Result  The contents of water, total sugar, crude fat, and protein in larva feces were 10.08%, 2.40%, 2.73%, and 11.89%, respectively. Total amino acid content was 4.326 9 mg·g–1, and total content of essential amino acid was 1.666 2 mg·g–1. The proportion of essential amino acid to total amino acid was 38.51%, and the ratio of essential amino acid to nonessential amino acid was 62.62%. I_EAA was 1.20. The mass fraction of unsaturated fatty acid was 64.05% and the ratio of unsaturated fatty acid to saturated fatty acid was 1.78. The essential fatty content was 30.49%. The contents of Ca, K, and Mg were higher, 8.126 7, 4.955 6, and 3.257 3 mg·g–1 respectively, while the content of Cu was the lowest, 0.053 8 mg·g–1. The contents of Vitamin C and Vitamin E were 0.387 5 and 0.158 3 mg·g–1.  Conclusion  The larva feces of H. jinyinhuaphaga are rich in nutrients and suitable for development and utilization as a new resource for insect tea. [Ch, 5 tab. 22 ref.]