搜索结果: 1-15 共查到“林学 CO2”相关记录27条 . 查询时间(0.171 秒)
江西农业大学专利：一种用于测定树干CO2释放速率的实验装置
江西农业大学 树干 CO2释放速率 测定实验装置
2024/4/7
本实用新型公开了一种用于测定树干CO 2 释放速率的实验装置，包括第一半圆柱体和第二半圆柱体，第一半圆柱体和第二半圆柱体组合形成中空圆柱体；所述第一半圆柱体和第二半圆柱体上下两端面为记忆棉，以和待测定树干相贴合；在所述记忆棉、和树干相贴合的那一侧面上安装有胸径尺；在所述第一半圆柱体/或第二半圆柱体的腔体中设置有温度传感器，以用于测量圆柱体腔体内温度；在所述第一半圆柱体/或第二半圆柱体的腔体中开有两...
Variations in Soil Properties and CO2 Emissions of a Temperate Forest Gully Soil along a Topographical Gradient
CO2 emission respiration C sequestration forest gully forest soil enzymatic activity
2024/1/11
Although forest soils play an important role in the carbon cycle, the influence of topography has received little attention. Since the topographical gradient may affect CO2 emissions and C sequestrati...
CO2 Emissions Accounting and Carbon Peak Prediction of China’s Papermaking Industry
paper and paper products LCA CO2 emissions carbon peaking
2023/11/22
China has been the world’s largest producer and consumer of paper products. In the context of the “carbon peaking and carbon neutrality goals”, China’s papermaking industry which is traditionally a hi...
近日，中国林业科学研究院森林生态环境与自然保护研究所森林与污染生态学科组在英文期刊Journal of Soils and Sediments上发表了题为“Highly elevated CO2 and fertilization with nitrogen stimulates significant schima superba growth and mediates soil microbi...
Effects on Greenhouse Gas (CH4, CO2, N2O) Emissions of Conversion from Over-Mature Forest to Secondary Forest and Korean Pine Plantation in Northeast China
secondary forests over-mature forests Korean pine plantation greenhouse gas fluxes global warming potential
2024/2/29
This study aimed to evaluate the seasonal variations of Greenhouse Gas fluxes (CH4, CO2, and N2O), Greenhouse Gas (GHG) emissions, and Global Warming Potential (GWP) over the extent of the regions and...
Evaluation of O3 Effects on Cumulative Photosynthetic CO2 Uptake in Seedlings of Four Japanese Deciduous Broad-Leaved Forest Tree Species Based on Stomatal O3 Uptake
Japanese deciduous broad-leaved trees net photosynthetic rate net primary production stomatal
2024/3/8
The current level of tropospheric ozone (O3) is expected to reduce the net primary production of forest trees. Here, we evaluated the negative effects of O3 on the photosynthetic CO2 uptake of Japanes...
Impacts of Change in Atmospheric CO2 Concentration on Larix gmelinii Forest Growth in Northeast China from 1950 to 2010
treegrowth CO2fertilization tree-ring dendrochronology InTECmodel
2024/3/12
Although CO2 fertilization on plant growth has been repeatedly modeled to be the main reason for the current changes in the terrestrial carbon sink at the global scale, there have been controversial f...
Long-term effects of CO2 enrichment on bud phenology and shoot growth patterns of Norway spruce juvenile trees
bud elevated CO2 Norway spruce phenology shoot length
2015/3/19
Bud phenology and shoot elongation growth were monitored on Norway spruce (Picea abies [L.] Karst.) trees grown inside glass domes with adjustable windows for six years under ambient (355 μmol CO2W...
Effects of salinity on leaf characteristics and CO2/H2O exchange of Kandelia candel (L.) Druce seedlings
salinity mangrove cell structure
2015/3/6
Effects of salinities on leaf characteristics and CO2/H2O exchange of mangrove species Kandelia candel seedlings were studied in a pot experiment. The seedlings grown in salinity of 50‰ caused a stron...
Influence of stand density, thinning and elevated CO2 on stem wood density of spruce
stand density stem wood density thinning
2015/3/6
Stem wood density (SWD) of young Norway spruce trees (Picea abies [L.] Karst.) growing at ambient (A variant, 350 μmol(CO2)/mol) and elevated (E variant, A + 350 μmol(CO2)/mol) atmospheric CO2 concent...
Soil surface CO2 fluxes in a Norway spruce stand
Norway spruce Picea abies soil CO2 efflux Q10
2015/2/2
The measurements of soil CO2 efflux in a Norway spruce (Picea abies [L.] Karst.) forest stand are reported for a 6-month period (from May 1st to October 26th 1999). Forest floor CO2 efflux was measure...
帽儿山地区落叶松人工林CO2通量特征及对林分碳收支的影响
兴安落叶松 涡度协方差法 碳收支 叶片光合作用
2011/11/4
2008年,采用涡度协方差法测定了黑龙江省尚志市帽儿山地区落叶松人工林的CO2通量，并于生长季(5—10月)不同月份测定了落叶松叶片光合日变化.结果表明: 不同时间段环境因子变化对落叶松人工林净生态系统交换量的影响存在差异，下午(12:00—24:00) 的净生态系统交换量对其饱和蒸汽压亏缺的变化反应较上午(0:00—12:00)迟钝；上午光能利用效率为0.6284 mol·mol-1，是下午的1...
小兴安岭落叶松沼泽林土壤CO2，N2O和CH4的排放规律
落叶松沼泽林 温室气体排放 季节变化规律 小兴安岭
2010/8/20
采用静态箱-气相色谱法，研究小兴安岭兴安落叶松-油桦-修氏苔草沼泽林、兴安落叶松-油桦-笃斯越橘-藓类沼泽林和兴安落叶松-狭叶杜香-中位泥炭藓沼泽林生长季节土壤温室气体（CO2,N2O和CH4）排放通量的季节变化规律、季节排放量及其主控因素。结果表明： 1）3种落叶松沼泽林土壤CO2排放通量均呈现夏季高（651.4～823.6 mg·m-2h-1）春秋季低（233.3～310.0 mg·m-2h-...
热重—红外联用测定分析马尾松林地表可燃物的CO2释放量
马尾松 CO2 烟气排放 定量分析
2009/12/2
采用热重-红外光谱分析联用技术分析森林可燃物气体排放的规律，测定气体的红外吸收频谱，对气体成分进行定性和定量分析。以朗伯特-比尔 （LambertBeer）定律为理论基础，通过定量分析可燃物气体的红外光谱，精确地测定了森林可燃物热失重的过程与CO2气体排放量的相关性。以福州地区马尾松林下地表可燃物为研究对象，估算了不同林型的马尾松林下地表可燃物的CO2释放量。
Porosity of Cement-Bonded Particleboards Hardened by CO2 Injection and Cured by Hydration
inorganic wood composites accelerated hardening water absorption
2009/9/10
The purpose of the porosity measurements was to compare the boards made by two different methods: the conventional, hydration curing method and the CO2 injection method, and to find out how their poro...