关键词: 牡丹（Paeonia suffruticosa Andr.）, 遮阴, 花期, 花色

Abstract: Paeonia suffruticosa Andr var. papaveracea （Andr.） Kerner was used to study the effects of different shading treatments on the flowering period and color quality of P. suffruticosa. The results showed that the light conditions under different shading degrees had obvious effects on the flowering period and color quality of peony. The full flowering period under 40% and 60% shading was 3 and 6 days later than that under full sunlight and the number, diameter, fresh weight and flower rate of peony were the best. 20% shade significantly improved the ornamental value of red peony; Under 40% shading, except for purple, the ornamental value of white, pink, red and black lines decreased; The effect of 60% shading on the flower color of all tested color systems was very obvious, which seriously affected and reduced the ornamental value of flower color.

Key words: peony （Paeonia suffruticosa Andr.）, shade, flowering, flower color