河南林州植物物候变化特征及其原因分析

根据河南省林州市1987年至2004年的物候和气象资料,运用一元线性回归法和相关分析法分析了林州市近20年来植物物候的变化特征及其对气候变化的响应。结果表明,近20年来,林州地区的毛白杨(Populus tomentosa Carr.)、刺槐(Robinia hispida Linn.)、梧桐(Firmiana simplex W.F.Wight)和白梨(Pyrus bretschneideri Rehd.)等木本植物的春季物候期提前,秋季物候期变化不一致,生长期延长;车前(Plantago asiatica Linn.)、藜(Chenopodium album Linn.)和苍耳(Xanthium sibiricum Patr.)等草本植物的春季物候期变化不一致,秋季物候期均提前,生长期缩短。木本植物春季物候变化受冬末春初气温变化的影响最大、日照次之、降水最小,秋季物候期对气候变化基本没有响应;草本植物的物候期主要受气温影响,降水能促进草本植物开花。木本植物的春季物候变化可作为反映气候变化的代用指标。

Analysis of plant phenological variation characters and its potential reasons in Linzhou of He'nan Province

Based on phenological and meteorological data in Linzhou City of He'nan Province from 1987 to 2004,phenological variation characters of some plants and their response to climate change were analyzed by using linear regression and correlation analysis methods.The results showed that in the last 20 years,spring phenological phases of some wood plants,e.g.Populus tomentosa Carr.,Robinia hispida Linn.,Firmiana simplex W.F.Wight and Pyrus bretschneideri Rehd.,became earlier and their autumn phases represented inconsistent,and thus their growing period prolonged.Meanwhile,spring phenological phases of herbaceous plants,e.g.Plantago asiatica Linn.,Chenopodium album Linn.and Xanthium sibiricum Patr.represented inconsistent,and their autumn phases advanced,so their growing period shortened.The spring phenological variation of wood plants was influenced most strongly by temperature change in late winter and early spring,and following by sunshine,then by precipitation,but their autumn phases primarily showed no response to climate variation.Phenological phases of herbaceous plants were mainly affected by temperature,and precipitation would promote them blooming.The spring phenological phase of wood plants can be considered as an alternate indicator to reflect the climate change.