目的 研究人参根大量营养元素及氨基酸量的动态变化规律,探讨了氮(N)、磷(P)、钾(K)与总氨基酸的相互关系。方法 以吉林抚松人参栽培基地的2～6年生人参为材料,分别于2007年4～10月共7次采样,测定不同参龄不同生育时期人参根中3种大量营养元素及总氨基酸的量,分析其变化规律及各种大量营养元素与总氨基酸积累的相互关系。结果 2～6年生人参不同生育时期根中总氨基酸的变化规律基本相近,呈现出"急降缓升"的动态变化趋势。参根对大量营养元素的吸收表现为N>K>P,均呈现出"V"字型变化趋势;相关性分析表明:2、4年生的N与氨基酸呈显著正相关,2、3、6年生的P与氨基酸呈极显著正相关,2、3年生的K与氨基酸呈极显著正相关。结论 人参根大量营养元素与氨基酸密切相关。在生产实践中根据不同参龄与生育时期,结合营养元素的动态变化,为促进参根氨基酸的积累提供理论依据。

Objective To study the macronutrient and amino acid content dynamics of ginseng roots and the relationship between N，P,K,and total amino acid.Methods Contents of three macronutrients and total amino acid of 2-6 year ginseng from Fusong county of Jilin Province were determined seven times from April to October in 2007,whereas,the dynamics of macronutrient content,amino acid content,and the relationship between each nutritive element and the total amino acid were analyzed.Results The change of the total amino acid of 2-6 year ginseng throughout the growth period exhibited the same tendency from urgent down to slow rising.The absorption ratio order is N>K>P,presenting "V" form changing tendency;It exhibited positive correnlation between the N contain of 2 and 4 year ginseng and amino acid;It is significantly related between P of the 2,3,and 6 year ginseng and the amino acid;It is remarkably related between K of the 2 and 3 year ginseng and amino acid.Conclusion It is closely related between the macronutrient and the amino acid in ginseng roots.According to the different ages and growth periods and the dynamic changing of nutritive element to incxease the content of amino acid in practice,the theory is provided here.

教育部博士点基金项目(20050193005)