| 【Objective】 In this study, a series of substrate formula modulated with long-acting controlled-release
nitrogen fertilizer (urea formaldehyde foam) and active phosphorus fertilizer were used to analyze the effects of different
fertilizer ratios on the quality of Dianthus caryophyllus seedlings, which provided theoretical basis for fertilization technology
of D. caryophyllus. 【Methods】The height and crown diameter of D. caryophyllus planted with modulated substrates were
measured at 0, 15 and 30 d, respectively, and the whole plants were harvested at the 30th day for the analysis of biomass, the
amount of nitrogen and phosphorus accumulation in above-ground part and root morphology indicators. 【Results】 At the
30th day, all the measured indicators (biomass of leave, stem and root, total root length, total root surface area, total N and P
of above-ground part) of T4 treatment (annual flower matrix added with compound fertilizer 1.6 kg/m3, slow release fertilizer 1.14 kg/m3, active phosphorus 5.71 kg/m3, urea formaldehyde 6.05 kg/m3 as the cultivation substrate)reached the maximum
values, and such indicators had significant difference with those of CK treatment (annual flower matrix added with compound
fertilizer 4.8 kg/m3, slow release fertilizer 3.6 kg/m3 as cultivation substrate). All the measured indicators (biomass of leave, stem
and root, total root length, total root surface area, total N and P of above-ground part) of T4 treatment were 3.12 g/plant, 1.75
g/plant, 0.82 g/plant, 5.15 m/plant, 526 cm2/plant, 179 mg/plant and 21.32 mg/plant, respectively. 【Conclusion】Substrates
modulated with controlled-release nitrogen fertilizer (urea formaldehyde foam) and active phosphorus fertilizer had significant
effects on the growth of D. caryophyllus. In consideration of biomass, total root length, total root surface area, nitrogen and
phosphorus accumulation of the above-ground part, the growth effect of D. caryophyllus seedlings under T4 treatment is the best,
which not only can obtain better morphological indicators, but also improve the accumulation of nitrogen phosphate fertilizer. |
