生态环境学报Issue(1)：50-57,8.
气候变化对内蒙古荒漠化草原优势植物物候的影响
Impacts of climate change on phenological phases of dominant grass species in the desert steppe in Inner Mongolia
摘要
Abstract
Climate change has been an accurate and sensitive indicator of global change in recent years. In order to take the further study on the effects of regional climate change on the plants phenological phase in the desert steppe, monitor the changes of grassland ecological environment, make for crop varieties classification of ecology, natural division of agricultural climate zoning or index, guide the local agriculture and husbandry production, provide the basic theory of strong support, the phenological observation data (the germination date, flowering date, wilting date and growing season length) and corresponding meteorological data from two meteorological stations of the desert steppe in western Inner Mongolia during 1983 to 2009 were used to reveal statistical relationships between phenology and meteorology. The results showed as follows:(1) It showed the ascending trend of annual mean temperature in the desert steppe in Inner Mongolia, the increased rate was about 0.34~0.75℃/10a and the change of precipitation was not apparent. The climate was getting warmer and drier. (2) Most plants′green up dates was intensely affected by mean tempreture and precipitation in spring (from March to May), the dates were 0.1~0.6 d/a in advance except Puccinellia distans L. The flowering periods of the dominant species were also becoming earlier. For instance, flowering dates of Sarcozygium xanthoxylum Bunge and Oxytropis aciphylla Ledeb. in Xilingaole was getting ahead at 0.5 d/a and 1.1 d/a degrees respectively. The wilting date was influenced by the water and heat condition from late summer to early autumn and they were different at two stations. Species withered in Wushenzhao postponed for about 0.6~0.8 d/a while plants turned yellow in Xilingaole had an exhibition of the trend of the advance because the date of withered stage was closely related to precipitation and tempreture prior to withering and yellowing in Xilingaole. (3)With the climate warming, the growing season lengths of all the tested species had prolonged though their phenological phases had changed.关键词
气候变化/植物物候/荒漠化草原/内蒙古Key words
climate change/phenological phase/desert steppe/Inner Mongolia分类
农业科技引用本文复制引用
李夏子,郭春燕,韩国栋..气候变化对内蒙古荒漠化草原优势植物物候的影响[J].生态环境学报,2013,(1):50-57,8.基金项目
国家自然科学基金项目(40865005 （）
41165005) （）
国家科技部科技基础性工作专项(2007FY210100) （2007FY210100）
