藏北高寒草地地下生物量特征及其与土壤水分的关系
Dynamics of Belowground Biomass and Its Relationship with Soil Moisture in Alpine Grassland on the North Tibetan Plateau
查看参考文献38篇
|
文摘
|
植物地下生物量是高寒生态系统重要的碳库,可以反映植物对极端环境的适应特征。以高寒草原、高寒草甸草原和高寒草甸3种主要草地类型为对象,对比分析了非生长季和生长季的地下生物量,探究不同类型的高寒草地地下生物量分配机制及其动态变化过程。结果表明:(1)3种草地地下生物量的空间分布在生长季和非生长季均呈现"T"字型分布。在这两个时期,3种草地0~10 cm的生物量占总地下生物量的比例均表现为:高寒草原(91.20%,94.72%)>高寒草甸草原(83.17%,92.07%)>高寒草甸(67.04%,68.38%),且其比例在生长季均有增加;(2)两个时期高寒草甸地下生物量均最高(1620.39±71.09)g?m~(-2),(3950.08±291.46)g?m~(-2),非生长季高寒草原最低(136.24±9.14)g?m~(-2),生长季高寒草甸草原最低(133.97±6.93)g?m~(-2);高寒草甸和高寒草原地下生物量在生长季都有显著增加,而高寒草甸草原显著减少;(3)地下生物量与土壤含水量有显著的正相关关系,在同样的温度条件下,土壤含水量是地下生物量的重要影响因子;而生长季是藏北地区降水比较集中的时期,土壤表层水分的增加促使根系向表层生长。 |
|
其他语种文摘
|
Root biomass is an important belowground C pool in alpine ecosystem and an indicator of plant adaptation to extreme environment. We conducted a field experiments to explore belowground biomass dynamics and its vertical distribution in three types of grasslands (alpine steppe, alpine meadow steppe and alpine meadow) in April (non-growing season) and August (growing season) in 2013. The results showed that, (1) the belowground biomass showed a pattern of "T" distribution. The proportion of 0~10 cm belowground biomass to the total belowground biomass was in a descending order of alpine steppe (91.20%, 94.72%), alpine meadow steppe (83.17%, 92.07%) and alpine meadow (67.04%, 68.38%). The proportions of belowground biomass at depth of 0~10 cm increased for all the three grasslands during growing season. (2) In the two periods, alpine meadow had the highest belowground biomass (1620.39±71.09), (3950.08±291.46) g?m~(-2). In non-growing season, alpine steppe had the lowest belowground biomass (136.24±9.14) g?m~(-2), while alpine meadow steppe had the lowest belowground biomass in growing season (133.97±6.93) g?m~(-2). The belowground biomass of alpine meadow and alpine steppe increased significantly, but that of alpine meadow steppe decreased significantly in growing season. (3) Belowground biomass showed a positive relationship with soil moisture, which implied that soil moisture, was a key factor to determine the belowground biomass accumulation under the same temperature. More belowground biomass was distributed to the surface soil in the growing season may result from the increasing precipitation and soil moisture in the topsoil during summer. |
|
来源
|
生态环境学报
,2016,25(2):189-195 【核心库】
|
|
DOI
|
10.16258/j.cnki.1674-5906.2016.02.002
|
|
关键词
|
高寒草地
;
地下生物量
;
空间分布
;
季节变化
|
|
地址
|
中国科学院水利部成都山地灾害与环境研究所, 中国科学院山地表生过程与生态调控重点实验室, 四川, 成都, 610041
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1674-5906 |
|
学科
|
植物学;环境科学基础理论 |
|
基金
|
中国科学院战略性先导科技专项
;
国家自然科学基金项目
|
|
文献收藏号
|
CSCD:5676713
|
参考文献 共
38
共2页
|
|
1.
Cai Y. Potential short-term effects of yak and Tibetan sheep dung on greenhouse gas emissions in two alpine grassland soils under laboratory conditions.
Biology and Fertility of Soils,2013,49(8):1215-1226
|
被引
5
次
|
|
|
|
|
2.
Dawes M A. Soil warming and CO_2 enrichment induce biomass shifts in alpine tree line vegetation.
Global Change Biology,2015,21(5):2005-2021
|
被引
11
次
|
|
|
|
|
3.
Gao Y Z. Belowground net primary productivity and biomass allocation of a grassland in Inner Mongolia is affected by grazing intensity.
Plant and Soil,2008,307(1/2):41-50
|
被引
45
次
|
|
|
|
|
4.
Garcia-Pausas J. Seasonal patterns of belowground biomass and productivity in mountain grasslands in the Pyrenees.
Plant and Soil,2011,340(1/2):315-326
|
被引
2
次
|
|
|
|
|
5.
Geng Y. Alpine climate alters the relationships between leaf and root morphological traits but not chemical traits.
Oecologia,2014,175(2):445-455
|
被引
19
次
|
|
|
|
|
6.
Kang M. Biomass and its allocation in relation to temperature, precipitation, and soil nutrients in Inner Mongolia grasslands, China.
PLoS One,2013,8(7):410-414
|
被引
1
次
|
|
|
|
|
7.
Li N. Plant production, and carbon and nitrogen source pools, are strongly intensified by experimental warming in alpine ecosystems in the Qinghai-Tibet Plateau.
Soil Biology and Biochemistry,2011,43(5):942-953
|
被引
39
次
|
|
|
|
|
8.
Liu Q. Belowground responses of Picea asperata seedlings to warming and nitrogen fertilization in the eastern Tibetan Plateau.
Ecological Research,2011,26(3):637-648
|
被引
11
次
|
|
|
|
|
9.
Lu X. Soil water soluble organic carbon under three alpine grassland types in Northern Tibet, China.
African Journal of Agricultural Research,2011,6(9):2066-2071
|
被引
1
次
|
|
|
|
|
10.
Lu X. Dynamics of above- and below-ground biomass and C, N, P accumulation in the alpine steppe of Northern Tibet.
Journal of Mountain Science,2011,8(6):838-844
|
被引
2
次
|
|
|
|
|
11.
Ni J. Estimating net primary productivity of grasslands from field biomass measurements in temperate northern China.
Plant Ecology,2004,174(2):217-234
|
被引
68
次
|
|
|
|
|
12.
Ohtsuka T. Soil organic carbon pools in alpine to nival zones along an altitudinal gradient (4400-5300 m) on the Tibetan Plateau.
Polar Science,2008,2(4):277-285
|
被引
18
次
|
|
|
|
|
13.
Scurlock J M O. Estimating net primary productivity from grassland biomass dynamics measurements.
Global Change Biology,2002,8(8):736-753
|
被引
154
次
|
|
|
|
|
14.
Soussana J F. Carbon cycling and sequestration opportunities in temperate grasslands.
Soil Use and Management,2004,20(2):219-230
|
被引
25
次
|
|
|
|
|
15.
Wang C. Changes in plant biomass and species composition of alpine Kobresia meadows along altitudinal gradient on the Qinghai-Tibetan Plateau.
Series C Life Sciences,2008,51(1):86-94
|
被引
6
次
|
|
|
|
|
16.
Wu J S. Biomass Allocation Patterns of Alpine Grassland Species and Functional Groups along a Precipitation Gradient on the Northern Tibetan Plateau.
Journal of Mountain Science,2013,10(6):1097-1108
|
被引
8
次
|
|
|
|
|
17.
Yang J. Variations in soil properties and their effect on subsurface biomass distribution in four alpine meadows of the hinterland of the Tibetan Plateau of China.
Environmental Geology,2008,57(8):1881-1891
|
被引
1
次
|
|
|
|
|
18.
Yang Y. Above- and belowground biomass allocation in Tibetan grasslands.
Journal of Vegetation Science,2009,1(20):177-184
|
被引
4
次
|
|
|
|
|
19.
Zhou X. Root Biomass Dynamics Under Experimental Warming and Doubled Precipitation in a Tallgrass Prairie.
Ecosystems,2012,15(4):542-554
|
被引
2
次
|
|
|
|
|
20.
白永飞. 羊草草原群落生物量季节动态研究.
中国草地,1994(3):1-5
|
被引
44
次
|
|
|
|
|
了解气象卫星更多信息，请访问