提高绿光占比对黄瓜幼苗形态、光合性状及碳水化合物的影响OACSTPCD

The aims of this study were to investigate the effects of different green light ratios on the morphology,photosynthetic traits and carbohydrates of cucumber seedlings and select the optimal green light ratio for the growth of cucumber seedlings.Based on the fixed red and blue light ratio of 4:1 and total light intensity of 200 μmol/(m2·s),the green light ratios were set to 10％(G10％),20％(G20％)and 30％(G30％),and the intensities were 60,40 and 20 μmol/(m2·s)to study the changes of growth and physiological indexes of cucumber seedlings under different green light ratios.The results showed that:Increasing the proportion of green light iwithin the appropriate range promoted the fresh weight and dry weight of cucumber seedlings,and the fresh weight of G30％treatment were increased by 29.65％and 29.26％compared with those in G20％and G10％treatments,respectively.Increasing the percentage of green light decreased the stomatal pore area but increased the leaf stomatal density.The pore area of G30％and G20％treatments significantly decreased by 13.17％and 23.05％compared to those in G10％treatment,but the stomatai densities of G30％and G20％treatments increased by 20.22％and 14.66％compared to G10％.Increasing the green light percentage increased its leaf tissue grid-to-sea ratio(P/S),and the P/S values of G30％treatment were significantly higher than those of G20％and G10％treatments by 23.21％and 26.97％,respectively.Increasing the green light ratio also promoted the photosynthetic potential of plants,and the net photosynthetic rate of G30％treatment was significantly higher than that of G10％by 77.37％under the measured light intensity of 1 000 μmol/(m2·s)measured light source.This study provides a basis and reference for plant plant nursery and supplemental light in facilities.