环境生态因子对牡丹花色及光合特性的影响

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

以"肉芙蓉"牡丹为试材,对露地和温室条件下各时期(从鳞芽萌动到开花)环境生态因子、光合特性和花色素苷含量进行了测定。结果表明:露地和温室条件下的环境生态因子差异明显,温室中大气均温较露地高2.8℃,有效积温高62℃,空气相对湿度高10%,昼夜温差小4.78℃,光照时数少2.2 h,光照强度低7 710.4 lx,导致温室牡丹净光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Gs)极显著下降,分别下降60%,16.4%和17.5%;胞间CO2浓度(Ci)增加227%,花色素苷含量下降39.3%。

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.