于强
主要从事植物生理生态、农业生态的试验与模型研究,包括作物光合作用、干物质积累与分配、农田生态系统的能量平衡与水热传输,与农田蒸散模型等。
个性化签名
- 姓名:于强
- 目前身份:
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学术头衔:
“973”、“863”首席科学家, 博士生导师
- 职称:-
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学科领域:
生态学
- 研究兴趣:主要从事植物生理生态、农业生态的试验与模型研究,包括作物光合作用、干物质积累与分配、农田生态系统的能量平衡与水热传输,与农田蒸散模型等。
男,1962年生,安徽阜阳人,研究员,博士生导师,中国科学院“百人计划”入选者,中共中央统战部华夏英才出版基金获得者(2002)。中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室副主任,栾城生态农业试验站站长(北京);中国气象学会生态环境与农业气象专业委员会副主任,中国农学会农业气象分会副理事长,中-澳水资源联合研究中心秘书长,全球水系统计划中国委员会(GWSP-CNC)委员,中国民主同盟中央科技委员会委员,中国科学院海外合作研究项目‘人类活动与生态系统变化’团队成员。 International Journal of Plant Production编委,Open Forest Science Journal Editorial Advisory Board顾问,Annals of Botany, Journal of Geographical Research, Agricultural and Forest Meteorology, Tree Physiology等国际学术刊物审稿人。1984年毕业于南京气象学院,1987年获得北京农业大学农业气象专业硕士学位,1994年获得南京大学大气科学系博士学位。1994-1996年在中科院上海植物生理所光合作用研究室做博士后,1997-1998任中科院大气物理所副研究员,1998年起任中科院地理科学与资源研究所研究员。1999-2000年荷兰瓦赫宁根大学和研究中心理论生产力生态系访问学者; 2003年1-7月美国农业部农业研究局访问教授,2005年1月-2006年1月澳大利亚科工组织McMaster Fellow,2006年3-8月加拿大Alberta大学访问学者。近五年来承担过‘863’计划、‘973’计划、国家自然基金重大项目、海外杰出青年基金项目和中科院领域前沿项目等,发表研究论文100余篇,其中SCI论文30余篇。
目前主要从事植物生理生态、农业生态的试验与模型研究,包括作物光合作用、干物质积累与分配、农田生态系统的能量平衡与水热传输,与农田蒸散模型等。具有农学、气象学和植物生理学的研究背景,在光合作用的理论模型、气孔导度模型和生态系统水、热、碳、氮循环的实验与模拟研究等方面取得新进展。
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826
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成果数
18
【期刊论文】Building a “Green” Railway in China
于强, Changhui Peng, , Hua Ouyang, Qiong Gao, Yuan Jiang, Feng Zhang, Jun Li, Qiang Yu
SCIENCE 27 APRIL 2007, VOL. 316,-0001,():
-1年11月30日
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33浏览
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于强, Yongqiang Zhang, , Qiang Yu, Changming Liu, Jie Jiang, and Xiying Zhang
Published in Agron. J. 96: 159-168 (2004),-0001,():
-1年11月30日
Winter wheat (Triticum aestivum L.) is one of most important procrops in the North China Plain. However, soil water deficit (SWD) often occurs due to lack of precipitation in its growing season. In this study, we introduce two semiempirical approaches, a recharge mode and the crop coefficient (Kc)-reference evapotranspiration (ET0) approach, to estimate wheat actual evapotranspiration (ETa) under no SWD and slight and severe SWD conditions. The recharge model allocated ET0 to reference evaporation and reference transpiration as a function of leaf area index. In the model, ETa is limited by soil water content, and crop water extraction for ETa is distributed through the soil profile as exponential functions of soil and root depth. The Kc-ET0 approach regardedETa under theSWDcondition as a logarithexmic function of soil water availability. Under no SWD condition, the recharge model simulated 10-d ETa with a root mean square error (RMSE) of 5.58 mm and a bias of 0.95 mm compared with measurements from a large-scale weighing lysimeter. The two approaches both estimated seasonal evapotranspiration (ET) well compared with the adjusted ET (from the soil water balance and the recharge model-simulated deep drainage). The recharge model, which simulated the seasonal ET with the RMSE of 27.8 mm and the bias of -8.0 mm, was better than the Kc-ET0 approach (RMSE =31.7 mm and bias= -33.1 mm). The seasonal pattern of soil water stress coefficient (Ks) showed that there were faster water losses at grain-filling stage than at other stages.
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【期刊论文】Influence of leaf water potential on diurnal changes in CO2 and water vapour fluxes
于强, Qiang Yu, Shouhua Xu, Jing Wang, Xuhui Lee
Boundary-Layer Meteorol (2007) 124: 161-181,-0001,():
-1年11月30日
Mass and energy fluxes between the atmosphere and vegetation are driven by meteorological variables, and controlled by plant water status, which may change more markedly diurnally than soil water. We tested the hypothesis that integration of dynamic changes in leaf water potential may improve the simulation of CO2 and water fluxes over a wheat canopy. Simulation of leaf water potential was integrated into a comprehensive model (the ChinaAgrosys) of heat, water and CO2 fluxes and crop growth. Photosynthesis from individual leaves was integrated to the canopy by taking into consideration the attenuation of radiation when penetrating the canopy. Transpiration was calculated with the Shuttleworth-Wallace model in which canopy resistance was taken as a link between energy balance and physiological regulation.A revised version of the Ball-Woodrow-Berry stomatal model was applied to produce a new canopy resistance model, which was validated against measured CO2 and water vapour fluxes over winter wheat fields in Yucheng (36◦57'N, 116◦36'E, 28m above sea level) in the North China Plain during 1997, 2001 and 2004. Leaf water potential played an important role in causing stomatal conductance to fall at midday, which caused diurnal changes in photosynthesis and transpiration. Changes in soil water potential were less important. Inclusion of the dynamics of leaf water potential can improve the precision of the simulation of CO2 and water vapour fluxes, especially in the afternoon under water stress conditions.
CO2 flux, Leaf water potential, North China Plain, Water vapour flux, Winter wheat
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【期刊论文】Micrometeorological fluxes under the influence of regional and local advection: a revisit
于强, Xuhui Lee, Qiang Yu, Xiaomin Sun, Jiandong Liu, Qingwen Min, Yunfen Liu, Xianzhou Zhang
Agricultural and Forest Meteorology 122 (2004) 111-124,-0001,():
-1年11月30日
This paper presents a new analysis of inequality of eddy diffusivities for sensible heat (KH) and water vapor (KW). It is shown that the same set of equations, established on the principle of dual-source diffusion, can be applied to both local and regional advection. Various advection scenarios are discussed using a formula that relates KH/KW to the Bowen ratio of the advective source and the observed gradient Bowen ratio (βg) near the ground surface. A similar analysis can also be performed for eddy diffusivities for trace gases. The ratio KH/KW, observed at a well-watered wheat field in the North China Plains, was mostly greater than unity when βg was negative and smaller than unity when βg was positive. The pattern was consistent with the theoretical analysis of the ratio under the influence of regional advection. Some degree of local advection was also suggested by the data. Despite inequality of the eddy diffusivities, there was little systematic bias between the evapotranspiration rates measured with a Bowen ratio/energy balance and an eddy covariance system.
Advection, Inversion, Evapotranspiration, Bowen ratio
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66浏览
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于强, Qiang YU, J.GOUDRIAAN, and Tian-Duo WANG
PHOTOSYNTHETICA 39 (1): 43-51, 2001,-0001,():
-1年11月30日
A mathematical model for photoinhibition of leaf photosynthesis was developed by formalising the assumptions that (1) the rate of photoinhibition is proportional to irradiance; and (2) the rate of recovery, derived from the formulae for a pesudo first-order pocess, is proportional to the extent of inhibition. The photoinhibition model to calculate initial photo yield is integrated into a photosynthesis-stomatal conductance(gs) model that combines net photosynthetic rate (PN), transpiration rate (E), and gs and also the leaf energy balance, The model was run to simulate the diurnal courses of PN, E, gs, photochemical efficiency, i.e, ratio of intercellular CO2 concentration and CO2 concentration over leaf surface (C/Cs), and leaf temperature (T1) under different irradiances, air temperature, and humidity separately with fixed time courese of others. When midday depression occurred under high temperature, gs decreased the most and E the least. The duration of midday depression of gs wasthe longest and that in E the shortest. E incerased with increasing vapour pressure deficit (VPD) initially. but when VPD exceeded a certain value, it decreased with increasing VPD; this was caused by a rapid decrease in gs. When air temperature exceeded a certain value, an increase in solar irradiance raised T1 and gs showed reasonable decreases under conditions causing photoinhibition compared with non-photonihibition condition under high irradiance. The T1 under photoinhibition was higher than thae under non-photoinhibition conditions, which was evident under high solar irradiance around noon. The decrease in Ci/Cs at midday implies that stomatal closure is a factor causing midday depression of photosynthesis
diurnal courses, initial photon efficiency, irradiance, leaf temperature, midday deppression, model, photosynthetic, photon flux density, stomatal conductance, temperature
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【期刊论文】Advance of tree-flowering dates in response to urban climate change
于强, Peiling Lu, Qiang Yu, Jiandong Liu, Xuhui Lee
Agricultural and Forest Meteorology 138 (2006) 120-131,-0001,():
-1年11月30日
An increase in temperature due to greenhouse effects is manifest in the changes in diurnal, annual and inter-annual patterns, which may alter phenological events in plants. Flowering dates of four tree species, Prunus davidina, Prunus armeniaca, Robinia pseudoacacia and Syringa oblata, were significantly advanced in response to temperature increase over the years 1950-2004 in Beijing, China, due to the impact of urban climate warming. Because both climate warming and the urban heat island effect in winter and early-spring were more rapid than in late-spring and early summer, the dates in early flowering species advanced more quickly than in late flowering species. The early flowering species, P. davidina, advanced by 2.9 days/decade, while the other species advanced by 1.5-2.0 days/decade during 1950-2004. Therefore, the intervals between flowering dates of different species were expanded. P. davidina, flowering in early-spring, was much more sensitive to minimum and average temperatures (2.88-2.96 days/
Tree phenology, Flowering date, Climate warming, Temperature, Urban heat island, Beijing
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46浏览
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于强, Q. Yu, H Hengsdijk, J.D. Liu
Int J Biometeorol (2001) 45: 53-58,-0001,():
-1年11月30日
Time series of rice yields consist of a technology-driven trend and variations caused by climate fluctuations. To explore the relationship between yields and climate, the trend and temporal variation often have to be separated. In this study, a progressive-difference method was applied to eliminate the trend in time series. By differentiating yields and climatic factors in 2 successive years, the relationship between variations in yield and climatic factors was determined with multipleregression analysis. The number of hours of sunshine, the temperature and the precipitation were each defined for different intervals during the growing season and used as different regression variables. Rice yields and climate data for the Yangtze Delta of China from 1961 to 1990 were used as a case study. The number of hours of sunshine during the tillering stage and the heading to milk stage particularly affected the yield. In both periods radiation was low. In the first period, the vegetative organs of the rice crop were formed while in the second period solar radiation was important for grain filling. The average temperature during the tillering to jointing stage reached its maximum, which affected rice yields negatively. Precipitation was generally low during the jointing and booting stages, which had a positive correlation with yield, while high precipitation had a negative effect during the milk stage. The results indicate that the climatic factors should be expressed as 20- to 30-day avaverages in the Yangtze Delta; a shorter or longer period, e.g. 10 or 40 days, is less appropriate.
Rice, Yield, Climate variation, Yangtze, Delta
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【期刊论文】Modeling a wheat–maize double cropping system in China using two plant growth modules in RZWQM
于强, Q. Yu, S.A. Saseendran, L. Ma, G.N. Flerchinger, T.R. Green, L.R. Ahuja
Agricultural Systems 89 (2006) 457-477,-0001,():
-1年11月30日
Agricultural system models are potential tools for evaluating soil-water-nutrient management in intensive cropping systems. In this study, we calibrated and validated the Root Zone Water Quality Model (RZWQM) with both a generic plant growth module (RZWQM-G) and the CERES plant growth module (RZWQM-C) for simulating winter wheat (Triticum aestivum L.) and maize (Zea mays L.) double cropping systems in the Northern China Plain (NCP), China. Data were obtained from an experiment conducted at Yucheng Integrated Agricultural Experimental Station (36
Agricultural system, Crop growth model, Evapotranspiration, Soil water, Soil temperature, Wheat, Maize, North China Plain
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于强, G.N. Flerchinger, Qiang Yu
Agricultural and Forest Meteorology 144 (2007) 230-235,-0001,():
-1年11月30日
The ability to simulate the surface energy balance and microclimate within a plant canopy is contingent upon accurate simulation of radiation exchange within the canopy. Accurate radiation simulations require some assumption of leaf angle distribution to compute transmissivity, reflection and scattering of radiation. The ellipsoidal leaf angle density function can very closely approximate real plant canopies but requires complex integrations for different combinations of leaf area index, incident radiation angle, and density function. This paper presents close approximations (R2>0.99) to compute the transmissivity and scattering functions for elliptical leaf angle distributions that can be more easily implemented into simulation models.
Long-wave radiation, Multi-layer canopy, Multi-source canopy, PAR, Short-wave radiation, Surface energy balance
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于强, Longhui Li, , Qiang Yu, Youfei Zheng, Jing Wang, Quanxiao Fang
Field Crops Research 96 (2006) 133-141,-0001,():
-1年11月30日
Currently available models of photosynthate partitioning in crops are poorly developed compared to carbon and water balance models. This paper presents a dynamic photosynthate partitioning model (PPModel) that simulates the partitioning of crop biomass to leaf, stem and root through the interaction between carbon gain (assimilation less respiration) and transpiration, in relation to environmental factors. The central concept is the theory of plant functional equilibrium, in which transpirational loss and water uptake are balanced, within acceptable limits, by a dynamic partitioning of assimilates between shoot and root growth. The model was shown to perform effectively against experimental data for growth and partitioning of biomass in winter wheat (collected over a 2-year period), when environmental factors varied daily and water supply was controlled over a wide range.
Photosynthate partitioning, Transpiration, Water absorption, Winter wheat, Mathematic model
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