基于形色指标和荧光参数的人参缺素表现研究OA

Objectives:To investigate the effects of different nutrient deficiency conditions on the growth,morphological and color indicators,and fluorescence parameters of Panax ginseng,so as to provide a theoretical basis for rational cultivation of Panax ginseng.Methods:The aim of this study was to characterize the morphological and physiological phenomena under nutrient deficiencies in Panax ginseng.The annual Panax ginseng was used in a hydroponic experiment with Hoagland's full nutrient solution control and 11 nutrient deficiency treatments to observe the symptoms of Panax ginseng deficiency.Morphological observations and nutritional tests were carried out to clarify the deficiency symptoms of Panax ginseng under the deficiency state by measuring the morphological indexes,mineral ele-ment contents,shape and color indexes,and fluorescence parameters.Results:Different nutrient deficiency treatments had varying im-pacts on the morphological indexes of Panax ginseng plants,generally leading to a significant decrease in the morphological indexes;The characterization of leaf color under elemental deficiencies revealed that deficiencies of N,P,Fe,Zn,Mn and S were the main nutrient el-ements leading to the obvious greening and yellowing of Panax ginseng leaves;The deficiencies of different nutrient elements had differ-ent impacts on the uptake of mineral elements of Panax ginseng,in a comprehensive view,the uptake of these elements significantly de-creased when Panax ginseng was deficient in the elemental supply.The fluorescence parameters of annual Panax ginseng leaves under deficiency were measured,and it was found that Panax ginseng with deficiency of N,P,K,Ca and other elements would reduce qP,PSⅡ reaction center,and photochemical reaction was inhibited or damaged.Conclusion:Nutrient deficiency treatment will significantly in-hibit the growth and biomass accumulation of Panax ginseng,lead to leaf chlorosis,reduce chlorophyll and mineral element content in Panax ginseng,and significantly weaken the stability of the photosynthetic system.Therefore,during Panax ginseng cultivation,mineral fertilizers should be reasonably applied according to the abundance and shortage of mineral elements in the soil in order to ensure the proper growth of Panax ginseng.