气候因子对科尔沁草原植物物候期的影响研究

Effects of Climatic Factors on Plant Phenology in Horqin Grassland

为深入探究气候因子对草原植物物候期的影响,选择内蒙古科尔沁草原为研究区域,基于1993—2019年科尔沁草原植物蒲公英、苍耳、车前子的生长期物候资料和气象预测资料,运用数理统计方法,分析气候因子对蒲公英、苍耳、车前子的萌芽期和开花期及枯黄期的影响。结果表明,科尔沁草原植物物候期主要是受气温的影响,其次是降水量的影响,日照影响最小;1993—2019年,科尔沁草原植物的物候期总体呈现提前趋势,说明气候因子对科尔沁草原植物影响较大;蒲公英、苍耳、车前子的物候期中,萌芽期和开花期呈现提前趋势,枯黄期呈现推后趋势。此为进一步研究草原植物的季节性现象与环境的周期性变化关系提供参考。

In order to deeply explore the impact of climate factors on the phenological period of grassland plants,Horqin grassland in Inner Mongolia is selected as the research area.Based on the growth phenological data and meteorological prediction data of dandelion,Xanthium sibiricum and plantain in Horqin grassland from 1993 to 2019,the effects of climate factors on the seed germination,flowering and withering stage of plantain were analyzed.The results showed that the plant phenology in Horqin grassland was mainly affected by temperature,followed by precipitation,and the influence of sunshine was the least.From 1993 to 2019,the phenological period of Horqin grassland plants generally showed an early trend,indicating that climate factors have a great impact on Horqin grassland plants.In the phenological period of dandelion,Xanthium sibiricum and plantain seed,the germination stage and flowering stage showed an early trend,and the dry and yellow stage showed a late trend.This provides a reference for further study on the relationship between seasonal phenomena of grassland plants and periodic changes of environment.