| 摘要: |
| 【目的】研究木薯块根中营养成分的分布规律，以提高木薯的综合利用价值。【方法】分别取6份木薯种质全薯、薯肉、薯皮的头、中、尾3段，测定其β-胡萝卜素含量及干物质、粗淀粉、粗蛋白、可溶性糖和粗纤维6种营养成分的质量分数，并分析不同部位营养成分的相关性。【结果】薯肉的干物质、粗淀粉质量分数分别是薯皮的1.3～1.8倍和1.2～2.8倍，表现为薯肉>全薯>薯皮；薯皮的β-胡萝卜素含量及粗蛋白、可溶性糖、粗纤维质量分数分别是薯肉的1.2～15.3，2.4～6.7，1.2～2.2和3.4～7.5倍，表现为薯皮>全薯>薯肉；薯皮干样的粗淀粉质量分数为27.1%～69.0%，是薯肉的32.8%～93.3%；6份木薯种质的全薯、薯肉、薯皮的头、中、尾3段粗蛋白、干物质质量分数均表现为头段>中段>尾段，且差异均达到极显著水平。【结论】木薯薯皮营养成分丰富，应重视木薯薯皮的综合利用。 |
| 关键词: 木薯 块根 薯肉 薯皮 营养成分 |
| DOI： |
| 分类号: |
| 基金项目:农业部现代木薯产业技术体系建设专项 (CARS-12-hnhj)；农业部农业行业标准制定项目“热带作物品种区域试验技术规程-木薯”(ICS 65.020.20) |
|
| Nutrients in different parts of cassava root |
|
WEI Yan,HUANG Jie,LIN Liming,et al
|
| Abstract: |
| 【Objective】This paper investigated the distribution of nutrients in cassava root to improve its utilization value.【Method】Three separate sections including head,middle,and end of the whole cassava,flesh,and cortex of six cassava germplasm were selected to measure contents of β-carotene and mass fractions of dry matter,starch,crude protein,soluble sugar and crude fiber.The correlation of nutrients in different parts was also analyzed.【Result】The mass fractions of dry matter and starch in flesh were 1.3-1.8 and 1.2-2.8 times of those in cortex,and they were in a decreasing order of flesh>whole cassava>cortex.The contents of β-carotene and mass fractions of crude protein,soluble sugar,and crude fiber in cortex were 1.2-15.3,2.4-6.7,1.2-2.2,and 3.4-7.5 times of those in flesh,and they were in a decreasing order of cortex>flesh>whole cassava.The starch mass fraction in dry cortex was 27.1%-69.0%,which was 32.8%-93.3% of that in dry flesh.The mass fractions of dry matter and crude protein in the whole cassava,flesh,and cortex of six cassava germplasm exhibited significant difference and were in the order of head>middle>end.【Conclusion】The cortex of Cassava is rich in nutrients and its comprehensive utilization is worthy to be highlighted. |
| Key words: cassava root flesh cortex nutrient |
