共查询到19条相似文献，搜索用时 515 毫秒
1.
呼和浩特市绿化树种的物候观察 总被引：2，自引：0，他引：2
贾玉英 《内蒙古林业调查设计》2015,38(1):132-135
影响物候期变化的因子主要有生物因素和环境因素,后者对物候期影响更显著,其中,气温、光照和水分是最主要的影响因子。目前,对物候学的研究方向主要集中在探讨物候与气候变化之间的关系。文章主要通过对内蒙古农业大学东区选择的几种主要绿化树种进行物候观察,总结了同种植物在不同环境下物候期的差别以及气温与植物物候期的关系,使植物物候期观察为城市园林绿化中进行树种选择、搭配等方面提供一定的依据。 相似文献
2.
高寒草地物候对气候变化响应的研究进展 总被引：1，自引：0，他引：1
《山东林业科技》2021,(4)
植物物候是植物适应其生长环境而呈现的规律性变化,被认为是最敏感和最容易观察到的自然现象之一。植物物候及其变化是多个环境因子综合影响的结果,其中气候是最重要、最活跃的环境因子。为了了解青藏高原高寒草地植物物候与气候因素之间的相互作用机制,更好地模拟和预测高寒草地生态系统对气候变化的响应。本文对国内外高寒草地植物对气候变化的响应研究进行了回顾。分析了以温度、降水、光照和积雪为主的气候因子对高寒草地植被物候的影响,阐述了高寒草地物候观测的方法,总结了气候变化对高寒草地植被物候研究现状和发展趋势。已有研究表明了物候变化能在一定程度上反映出气候变化的趋势,且气候因素作为物候的主要驱动力在不同的时期发挥着重要的作用。本文旨在结合高寒草地植物物候已有的研究方法为青藏高原高寒草甸区的研究提供一些参考和借鉴。 相似文献
3.
4.
《内蒙古林业调查设计》2018,(6)
气候变化显著影响植物的开花格局,进而导致物种多样性改变,因此,明确气候变暖对植物物候的影响过程和机理是理解和应对气候变化的前提。文章综述了气候变化对生态系统和植物物候的影响,以及现阶段对植物花期物候分子机制的研究进展,旨在为草原植物物种基因组群的功能研究提供参考。 相似文献
5.
6.
7.
8.
《林业实用技术》2021,(7):39-43
以张掖市文冠果(Xanthoceras sorbifolium)省级林木良种基地内不同树龄的文冠果为研究对象,通过对文冠果10 a的物候观测,并结合同期基地内地面气象观测资料,开展试验区文冠果物候期与气温变化的相关性分析,探讨该区域气候与文冠果物候的变化规律及相互关系。分析结果表明:甘肃河西地区文冠果萌芽到落叶整个生长期平均为210 d,花期28 d,果实生长期80 d;影响文冠果物候期变化的主要气象因子是温度,文冠果结实量的多少与当年花期温度有着密切的关系,特别是文冠果萌芽期和开花展叶期平均温度的高低,是直接关系到文冠果当年丰产与否的关键气象因子;物候期发生在春季骤降短时低温对物候的影响大于物候期发生当月平均气温对物候的影响,而当月平均气温的影响大于年平均气温的影响。 相似文献
9.
10.
物候是记录一年中植物的生长荣枯,动物的来往生育,据此来了解气候变化和它对动植物的影响.松毛虫虫态的变化,也是物候的一个组成部分.在一年中,松毛虫虫态的不断变化、增殖、猖獗与消亡的交替,导致对松毛虫的观察调查、测报防治等森保工作也跟随而来。为了解物候与马尾松毛虫防治 相似文献
11.
Temperature during seed maturation can induce an epigenetic memory effect in growth phenology of Norway spruce (Picea abies (L.) Karst.) that lasts for several years. To quantify the epigenetic modifications induced by natural climatic variation, common garden experiments with plants originating from different provenances and seed years were performed. Plants from warmer seed years showed delayed phenology with later bud flush, bud set and growth cessation. This effect was quantified by linear models of phenology traits as a function of climate indices for the origin and seed year of the plants. Significant effects of the temperature during seed production (seed year) was found for the bud set in seedlings in their first growing season and for bud flush and growth cessation in the 7th-8th growing season from seed. The models suggest that growth start and growth cessation are delayed 0.7–1.8 days per 100 additional degree days experienced by the seed during embryo development and seed maturation. Models that include factors that are known to induce epigenetic effects could be used to better predict future performance of forest reproductive material. 相似文献
12.
Kaisa Heimonen Anu Valtonen Sari Kontunen-Soppela Sarita Keski-Saari Matti Rousi Elina Oksanen 《Scandinavian Journal of Forest Research》2017,32(2):95-104
Susceptibility of trees to herbivorous insects is often associated with the tree growth and phenology, both of which are sensitive to a warming climate. Therefore, changes in these traits may affect the intensity of herbivory on trees in the future. We grew silver birch (Betula pendula) populations differing in their growth and phenology in a common garden experiment, and studied the effect of these plant traits on the leaf herbivory, insect herbivore density and community composition of herbivores in two consecutive years, 2011 and 2012. Differences in size and the timing of growth cessation among the birch genotypes were related to differences in herbivore community compositions and herbivory. In 2011, the most intensive herbivore damage was observed on birch genotypes of small size, late bud burst and early growth cessation, and these genotypes originated from high-latitude populations. The differences among birch genotypes in their susceptibility to herbivore damage may lead to differences in their competitive abilities. While climate warming will affect phenology and growth of plants, our study shows, that it may indirectly affect herbivory and herbivore communities as well. 相似文献
13.
The seasonal distribution of fires is one fire regime variable which has received little attention with regard to its effects on plants. For species with a short life-span that recruits after fire, the seasonal timing of a fire can be expected to be important due to effects on potential growth period and reproduction. We observed phenology and reproductive output in two annual and fire-dependent Geranium spp. in the southern part of the European boreal forest. In a garden experiment with the two species under two levels of nutrition, we established cohorts of seedlings at several dates over three summers. Time from germination to flowering and first mature seed differed little between the two species and levels of nutrition; i.e. plant size or level of nutrition had almost no effect on phenology. However, emergence time controlled the timing of reproduction. Most plants emerging before the second week of July in the garden experiment bolted the same year. Plants emerging later behaved as winter-annuals and started to flower in June the following year. A similar dichotomy was observed for populations of Geranium spp. at a number of burnt forest sites that differed in date of fire. This response is likely controlled by photoperiod. Nevertheless, at sites that burnt early some plants did not bolt in the same season; probably an effect of variable seedling emergence dates in the populations. In both the field and garden experiment, there were plants entering reproduction too late to produce mature seeds. Our results indicate that management fires should be conducted either very early, or during July and August to achieve a high seed production in these rare forest plants. 相似文献
14.
15.
Igor A Silva Danilo M da Silva Gustavo H de Carvalho Marco A Batalha 《Annals of Forest Science》2011,68(7):1207-1215
Introduction
The reproductive phenology of plants is expected to be influenced by climatic factors and by the phylogenetic history of the species. In savannas, the peaks of flowering and fruiting are associated with climate seasonality. However, there is still a controversy about the reproductive phenology of plants in riparian forests, a vegetation type that does not experience a severe water shortage. 相似文献16.
PEI Shunxiang LI Changhai GUO Quanshui XIN Xuebing SUN Jianxin HONG Ming .Experimental Centre of Forestry in North China Chinese Academy of Forestry Beijing R.P.China .Forest Botanical Garden Hei Longjiang Province Harbin R.P.China .Research Institute of Forest Ecology Beijing R.P.China 《中国林业科技(英文版)》2010,(3):10-21
Global climate change has caused phenology change of vegetation.This is especially obvious in urban area.This paper reveals response mechanism of spring phenology of main gymnosperm in Harbin City proper to climate change based on relationship study between two typical phenophases(beginning of bud burst and beginning of leaf expansion) of Korean pine(Pinus koraiensis),Koyama spruce(Picea koraiensis Nakai),needle fir(Abies nephrolepis) and Pinus sylvestnis var.mongolica Litv.and the temperature of every ten ... 相似文献
17.
根据中国物候观测网武汉观测站的物候和气温、降水资料,分析了武汉市25种木本植物春季展叶期、始花期和盛花期,秋季落叶期等4个关键物候期的变化趋势、对气候变化的阶段响应特点及气温、降水变化的关系。结果表明:1963年以来,武汉地区气温呈显著上升趋势。春季物候期的早晚主要受春季气温的影响,特别是春季物候期发生当月和上1月的平均气温对物候期的影响很大。秋季物候期受秋季气温的影响,特别是物候发生当月的温度。叶子的物候期与前1月的降水量有较为明显的关系,但是花的物候期和降水的关系不明显。 相似文献
18.
19.
We investigated the potential of Fraxinus americana L. to adapt to climate change by comparing diameter growth, survival and physiological status of 44 populations of 30-year-old trees originating from throughout the species range and grown in a common garden. Populations originating closest to the latitude of the common garden had the most rapid diameter growth and the highest survival. Among populations originating within a narrow latitudinal band along an east-west gradient of decreasing precipitation, those from the drier western end were best adapted to the dry climate of the common garden site, as judged by survival, stem circumference, leaf and wood carbon isotope ratios, leaf mass per area and leaf nitrogen concentration. These findings suggest that eastern populations may not perform well under the hotter and drier conditions predicted by climate change scenarios. Moreover, in the event of significant climate change, the short-term acclimation responses (within a generation) of F. americana may be insufficient to ensure the continued vigor or survival of this species throughout much of its present range. 相似文献