| 苦荞籽粒蛋白质营养评价及其对硒的响应 |
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| 引用本文： | 田秀英,李会合.苦荞籽粒蛋白质营养评价及其对硒的响应[J].食品科学,2010,31(7):105-108. |
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| 作者姓名： | 田秀英 李会合 |
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| 作者单位： | 重庆文理学院生命科学与技术学院 |
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| 基金项目： | 重庆市自然科学基金项目(2007BB1457); 重庆市教委科学技术研究项目(KJ091205) |
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| 摘 要： | 采用盆栽实验研究苦荞籽粒蛋白质营养评价对硒的响应。结果表明，不施硒时，苦荞籽粒必需氨基酸与氨基酸总量比值(E/T)和必需氨基酸与非必需氨基酸比值(E/N)分别为34.4% 和52.2%，与WHO/FAO 提出的E/T 约40%，E/N 约60% 相接近，苦荞蛋白质为优质蛋白。在所测定的必需氨基酸中，含硫氨基酸(蛋氨酸+ 胱氨酸)含量和各评分值均最低，是第一限制性氨基酸。除施硒量0.5mg/kg 土壤处理外，施硒使苏氨酸和赖氨酸含量有不同程度升高，蛋氨酸+ 胱氨酸随外源硒质量分数的增加而降低；施硒量≥ 1.0mg/kg 时，苦荞籽粒的粗蛋白(CP)、必需氨基酸、非必需氨基酸和氨基酸总量随施硒量的增加而增加；施硒量1.5～2.0mg/kg 土壤时，除含硫氨基酸(蛋氨酸+ 胱氨酸)外其余各必需氨基酸的含量和各评价指标均优于不施硒的处理。
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| 关 键 词： | 苦荞 硒 蛋白质 营养评价 |
| 收稿时间： | 2009-07-08 |
Nutritional Evaluation of Protein in Tartary Buckwheat Grain and Its Response to Selenium |
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| TIAN Xiu-ying,LI Hui-he.Nutritional Evaluation of Protein in Tartary Buckwheat Grain and Its Response to Selenium[J].Food Science,2010,31(7):105-108. |
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| Authors: | TIAN Xiu-ying LI Hui-he |
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| Affiliation: | College of Life Science and Technology, Chongqing University of Arts and Sciences, Chongqing 402168, China |
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| Abstract: | Pot-culture experiment was conducted to nutritional evaluation of protein in tartary buckwheat grain and its response to selenium.Results indicated that the ratios of E/T(essential amino acid/total amino acid) and E/N(essential amino acid/nonessential amino acid) in buckwheat grain cultured in soil without selenite were 34.4% and 52.2%,respectively,which was similar with WHO/FAO standard(40% for E/T and 60% for E/N).Meanwhile,proteins in buckwheat grain exhibited excellent quality.The content,amino acid sco... |
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| Keywords: | tartary buckwheat selenium protein nutritional evaluation |
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