不同施氮水平下枸杞主要次生代谢产物与多糖的关系研究

目的]在考虑枸杞主要次生代谢产物与多糖关系的基础上探索枸杞最佳施氮量。方法]在田间条件下研究了不同施氮水平对枸杞主要次生代谢产物甜菜碱、类胡萝卜素、黄酮的影响及其与多糖的关系。结果]不同的施氮肥水平下枸杞主要次生代谢产物甜菜碱、类胡萝卜素、黄酮的含量存在着差异。适中的施氮量(600~900 kg/hm2)对枸杞类胡萝卜素等次生代谢物质的形成和积累有利。相关性分析结果表明,多糖与甜菜碱、黄酮、总糖均呈显著负相关,说明在枸杞生产中,产量和品质不能同时达到最佳,应通过施氮量调节多糖与次生代谢物质的关系,获得产量与品质均较高时的平衡点。结论]考虑到产量和质量的关系,枸杞最适宜施氮量应为600~900kg/hm2左右。

Study on the Relationship between the Main Secondary Metabolites and Polysaccharide in Fruits of Lycium barbarum at Different Application Amounts of Nitrogen

Objective] The aim of this study was to investigate the optimum application amount of nitrogen in Lycium barbarum based on the relationship between main secondary metabolites and polysaccharide.Method] Under field conditions,the effects of different application amounts of nitrogen on main secondary metabolites of betaine,carotenoid and flavone of Lycium barbarum and the relationship between main secondary metabolites and polysaccharide.Result] The main secondary metabolites of betaine,carotenoid and flavone of Lycium barbarum varied under different application amounts of nitrogen.The proper application amount of nitrogen(600-900 kg/hm2) was beneficial to the formation and accumulation of secondary metabolites such as carotenoids.Correlation analysis results showed that polysaccharide were negatively correlated with betaine,carotenoid and flavone at significant probability level.Conclusion] Considering the relationship between output and quality of the fruit of Lycium barbarum,the optimum nitrogen application amount should be 600-900 kg/hm2.