5年模拟增温后矮蒿草草甸群落结构及生产量的变化
Effects of a 5-years mimic Temperature Increase to the structure and productivity of kobresia humilis meadow
查看参考文献14篇
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文摘
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5年模拟增温后观察表明,植物生长期4～9月暖室内10 cm、20 cm地下土壤平均增温1.86℃,10 cm、20 cm地上空气平均增温1.15 ℃,地表0 cm平均增温1.87 ℃,且增温在植物生长初期大于生长末期及枯黄期.在模拟增温初期年生物量比对照高,增温5年后生物量反而有所下降.增温使禾草类植物种增加,杂草减少.从表面来看,增温可使植物生长期延长,利于增大生物量,实际受热效应作用,植物发育生长速率加快,植物成熟过程提早,生长期反而缩短,加之玻璃纤维的存在使暖室内外温度交换减缓,减少了温度日变化,限制干物质积累,终久导致生物量减少.这说明小气候的作用,环境条件诱发土壤结构变化,植被的种群结构也随之改变,甚至出现演替的过程,全球变暖不仅对植物的生物生产力影响较大,而且对植被类型的演替有着不可忽视的作用. |
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其他语种文摘
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A mimic 5-year temperature increased in a greenhouse raised the soil temperature of 10 and 20 cm depth 1. 86 C higher than that in the open, the 10 and 20 cm above ground air temperature 1. 15 ℃ higher and the soil surface temperature 1. 87 ℃ higher than that in the open respectively, The extent of temperature increase was generally greater in the early plant growing season than in the later stage and the plant withering period. The result showed that in the first few years of the 5-year experiment, the yearly biomass from the greenhouse is weightier than that of the control in the open. However, after the 5-year period, the yearly biomass form the greenhouse decreased and became less than of the control. Though higher temperature increased the number of grass species, prevented weeds from teeming the land, and apparently extended the plant growing period,and raised the biomass, the heat accelerated the growth and maturing of plants, thus shortening the growing period actually . Moreover, the glass of the greenhouse retarded the fluctuation of temperature of daytime and the night time, and restricted the accumulation of dry matter, all this leads to the decrease of biomass in the greenhouse. The micro-climatic change of soil structure which also changes the structure of the plant species and leads to the species succession process. Consequently, global warming not only affects the plant productivity, but the succession of plant types as well. |
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来源
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草地学报
,2004,12(3):236-239 【扩展库】
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关键词
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草原学
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模拟增温
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矮嵩草草甸
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暖室
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群落结构
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地址
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中国科学院西北高原生物研究所, 西宁, 810001
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1007-0435 |
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学科
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植物学;畜牧、动物医学、狩猎、蚕、蜂 |
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基金
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中国科学院知识创新工程项目
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中国科学院海北高寒草甸生态系统实验站基金
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文献收藏号
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CSCD:1700535
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参考文献 共
14
共1页
|
|
1.
IPCC. Impact.
Climate Change 2001:Impact,Adaptation,and Vulnerability,2001:12-28
|
被引
1
次
|
|
|
|
|
2.
齐晔. 北半球高纬度地区气候变化对植被的影响途径和机制.
生态学报,1999,19(4):474-478
|
被引
33
次
|
|
|
|
|
3.
陈隆勋. 中国近45年来气候变化的研究.
气象学报,1998,56(3):257-271
|
被引
309
次
|
|
|
|
|
4.
Grulke N E. Carbon balance in tussock tundra under ambient and elevated atmospheric CO2[J].
Oecologia,1990,83:485-494
|
被引
2
次
|
|
|
|
|
5.
周华坤. 模拟增温效应对矮嵩草草甸影响的初步研究.
植物生态学报,2000,24(5):547-553
|
被引
87
次
|
|
|
|
|
6.
沈振西. 高寒矮嵩草草甸植物类群对模拟降水和施氮的响应.
植物生态学报,2002,26(5):288-294
|
被引
44
次
|
|
|
|
|
7.
Drake B G. An open chamber for field studies of elevated atmospheric CO2 concentration on salt marsh vegetation[J].
Functional Ecology,1989,3:363-371
|
被引
5
次
|
|
|
|
|
8.
李晓兵. 气候变化对中国北方荒漠草原植被的影响.
地球科学进展,2002,17(2):254-261
|
被引
93
次
|
|
|
|
|
9.
沈永平. 长江-黄河源区未来气候情景下的生态环境变化.
冰川冻土,2002,24(3):308-314
|
被引
53
次
|
|
|
|
|
10.
汤懋苍. 青藏高原近代气候变化及对环境的影响[M].
青藏高原近代气候变化及对环境的影响,1998:121-144
|
被引
28
次
|
|
|
|
|
11.
李英年. 高寒植被类型及其植物生产力的监测.
地理学报,2004,59(1):40-48
|
被引
41
次
|
|
|
|
|
12.
周兴民. 海北高寒草甸生态系统定位站的主要植被类型及地理分布规律[A].
高寒草甸生态系统,1982:9-18
|
被引
19
次
|
|
|
|
|
13.
乐炎舟. 海北高寒草甸生态系统定位站的土壤类型及其基本特点[A].
高寒草甸生态系统,1982:19-33
|
被引
19
次
|
|
|
|
|
14.
中央气象局. 地面气象观测规范[M].
地面气象观测规范,1982:95-107
|
被引
2
次
|
|
|
|
|
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