Effect of nitrogen on watermelon seedling growth and chlorophy11 fluorescence parameters of watermelon leaves
Abstract：The sand culture was used to investigate the changes of watermelon seedlings growth and chlorophyll fluorescence parameters of ZaoChunHongYu after the application of different concentrations of nitrogen.The results showed that the dry matter accumulation of watermelon seedlings was the biggest under the treatment of nitrogen 16.67 mmol·L-1.Fo reduced to the minimum,Fv/Fo and ΦPSⅡ increased to the maximum,but Fv/Fm did not show obvious change when nitrogen supply was from 16.67 mmol·L-1 to 20.83 mmol·L-1.From the whole change,qN varied stronger than qP which rised up first and then fell down as the nitrogen increased,but the change of qN was opposite.The results suggested that the application concentration of nitrogen from 16.67 to 20.83 mmol·L-1 could improve the watermelon seedling photosynthesis and growth,but more or less N could inhibit the seedling growth.
Keywords：WatermelonNitrogenChlorophyll fluorescenceGrowth
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)