Abstract: The hydroponics experiment was conducted to study the nutrition basis for growth promotion of wheat by Enhanced Ammonium Nutrition(EAN). Compared with fertilizing NO₃^- alone,EAN significantly increased Nconcentration and accumulation in leaves,sheaths,and whole plant,but there were not significant effects on roots. EAN had no significant effects on concentration of Pand K,but decreased that of Ca and Mg in whole plant. EAN increased accumulation of P,K,and Ca in whole plant,and decreased that of Mg,whereas single NH₄⁺ decreased accumulation of all mineral nutrients. EAN had different effects on accumulation of mineral nutrients in different genotypes. Compared with fertilizing NO₃^- alone,EAN increased accumulation of P,K,and Ca of YM158 and LZ953. For the accumulation of JDM,there was little responsive to EAN. These results indicated that EAN promoted Nabsorption and increased accumulation of N,P,K,and Ca in whole plant.

Key words: Wheat, Enhanced ammonium nutrition(EAN), N accumulation, Mineral nutrient, low temperature, brassinolide, salicylic acid, cucumber (Cucumis sativa), photosynthesis