中文摘要：

目的系统分析比较秋季大棚栽培淮扬金花菜（秧草）不同刈割茬数可食用嫩芽干粉营养成分。方法 2013年9月份种植的6座秧草大棚,每隔30天机器刈割一次,刈割6次,最后收集成熟期地上部分全草（种子未脱粒和脱粒后）以及干草秸,共计9茬。经低温真空干燥后超微粉碎成干粉。整个过程详细记录样品水分流失情况。采用标准食物营养成分检测方法进行系统的营养成分比较分析。结果前6茬刈割秧草嫩芽干粉中蛋白质含量〉28.5%,且含有18种氨基酸,9种必需氨基酸,氨基酸模式与人体氨基酸模式接近,限制氨基酸为色氨酸和蛋氨酸;总膳食纤维含量24.6%-28.4%,脂肪含量4.0%-6.0%;含有丰富的维生素、矿物质及微量元素。其中前3茬秧草嫩芽干粉蛋白质含量分别为38.6%、37.9%和35.9%,脂肪含量分别为4.3%、5.1%及5.0%,总膳食纤维含量为25.4%、24.6%和27.2%。结论秋季大棚栽培秧草前6茬刈割的嫩芽干粉含有丰富的营养成分,以高蛋白、高膳食纤维、低脂肪为特征,且相应营养成分及含量不因刈割茬数的增加而发生明显变化。但种子成熟期样品营养素含量急剧下降,均不具直接食用价值。

英文摘要：

Objective Analyze and evaluate systematically on the nutrient component variations of Huaiyang Medicago polymorpha cultivated in autumn greenhouse with different mowing crops. Methods Cultivated all the Medicago polymorpha grops in six greenhouses in November 2013,mowed totally six times with every 30 days,finally collected all the mature part of the whole grass on the ground（ seeds before and after threshing） and straws which amount to nine crops. After vacuum dried at low temperature then grinded into superfine powder. Details of sample moisture have been recorded during the wholeprocess. Standard food nutrition ingredient detection method was adopted to make systematically comparative analysis on the nutrients. Results All the protein contents in the first six mowing edible crops of Huaiyang Medicago polymorpha were above 28. 5%. It contained 18 amino acids,9 kinds of essential amino acids which amino acid pattern was close to human beings, limiting amino acids here were referred to tryptophan and methionine. The ultimate dietary fiber was between 24. 6% and 28. 4%,the fat content was between 4. 0% and 6. 0%. The crops also contained abundant vitamins,minerals and trace elements. The protein content of the first three mowing crops powder were 38. 6%,37. 9% and 35. 9%,the contents of fat content were 4. 3%,5. 1% and 5. 0%,the content of dietary fiber were 25. 4%,24. 6% and 27. 2%. Conclusion The first six mowing crops of the Huaiyang Medicago polymorpha which cultivated in autumn greenhouse contained abundant nutrient ingredients especially high protein,high dietary fiber and low fat. And the corresponding nutrition ingredients and contents have not changed significantly with the increased mowed crops. The nutrient contents of all the crops in the seed mature period and hay straw fell sharply and showed no directly edible value.