Effects of environmental ecological factors on flower color and photosynthetic characteristics of peony

Using Paeonia suffruticosa Andr. 'Roufurong' as experimental materials, the ecological factors, photosynthetic characteristics and anthocyanidin content of peony in open field and greenhouse were determined from bud to bloom. The result showed, the ecological factors in open field were obviously different with those in greenhouse. Under the condition of greenhouse, the atmosphere temperature，effective accumulative temperature and air humidity were respectively 2.8℃，62℃and 10% higher than open field. The temperature difference between day and night, sunshine time and light intensity in greenhouse were respectively 4.78℃, 2.2 h and 7710.4 lx less than open field. Those environmental ecological factors in greenhouse led to a decline of Pn, Tr and Gs of peony, and respectively decreased 60%, 16.4% and 17.5%, but an increase of 227% for Ci. Then anthocyanidin content of peony in greenhouse decreased 39.3% than open field.