Jing Wang

China Agricultural University | CAU · Department of Agricultural Meteorology

The recent and unprecedented flood events in the populated regions of Asia have raised concerns about how atmospheric rivers (ARs), an important agent of extreme precipitation over the region, will change under global warming. An ensemble of high-resolution general circulation models projects that ARs and their associated precipitation penetrate As...

Projected near-future changes in mean and extreme precipitation by the end of the mid-21st century over China are investigated using the latest CMIP6 HighResMIP simulations grouped by different categories of horizontal and vertical resolutions. Evaluation of the historical simulations demonstrates improvements in the realism of the simulated precip...

Crop phenology has a major influence on crop yield and is a major aspect of crop response to global warming. Process-based models of phenology are often used to predict the effect of weather on the development rate of crops through their growth phases, but such models are associated with large uncertainties, as demonstrated by the large variability...

Frost damage during flowering is recognized as one of the most serious agro-meteorological disasters affecting apple production in Shaanxi province, a typical apple producing area in China. Quantitative assessments of flowering frost damage to apple yield are critical for the development of strategies on mitigating yield losses, but have been rarel...

Potato production plays an important role in safeguarding food security in China since the central government implemented the ‘Potato-as-Staple-Food’ policy in 2015. However, a key challenge facing China's potato production is to realize a tradeoff between economic return and environmental impact. Effective strategies for reducing carbon emission w...

The impacts of global climate warming on maize yield vary regionally. However, less is known about how soil modulates regionally-specific impacts and soil properties that are able to alleviate adverse impacts of climate warming on maize productivity. In this study, we investigated the impacts of multiple soil inherent properties on the sensitivity...

Rising temperatures and varying precipitation patterns pose huge challenges to the global potato supply. Understanding the adaptation potential of potato to climate change is urgently needed to help develop effective measures for future agriculture and food security. In this study, we evaluated future potato yield changes under 1.5 °C and 2.0 °C wa...

Abstract: Precipitation is one of the most important factors impacting variation of vegetation productivity in the agro-pastoral ecotone in North China. However, the increase in canopy temperature due to rising air temperature has been impacting vegetation productivity under climate warming background. Therefore, the impacts of changes in canopy te...

CONTEXT: The potential of climate adaptation has been widely investigated with a climate-crop modeling approach. Although different sources of uncertainty in projected crop yields have been quantified in climate change impact assessments, uncertainty in simulating the crop adaptation to future climate has not been fully assessed. OBJECTIVE: The obj...

China ranks the first in total planting area and production of potato (Solanum tuberosum L.) over the world. However, high potato yield depends on a large amount of irrigation that raises a series of environment problems. Assessing the water-saving potential across China's potato planting regions is of importance for maintaining sustainable develop...

With a rapidly increasing global population and increasing uncertainty over food security, farmers are facing a dilemma of producing crops with a higher yield on the same (or even less) cultivated areas. More specifically, the mean growth rate of global crop yield must exceed 2.4% per year to feed 10 billio n people by 2050s. However, the ongoing c...

Climate warming and water resource shortage are severely threatening crop production in Inner Mongolia. Selecting optimal planting date (OPD) is recognized to be an effective way in alleviating water stress by matching crop water requirement with natural precipitation. However, optimal planting dates and drought resistance of staple crops have been...

Rising temperatures and frequent extreme high temperature events under future climate scenarios have posed pressing challenges with respect to global food security. Previous climate-crop modelling studies have investigated the impacts of rising temperature and heat stress on grain yield. However, the potential and priority of dealing with rising me...

Water is a determining factor in crop production, particularly with the increase of irrigation areas and crops in recent years. Water shortage has posed a great challenge to crop production in North China. Fortunately, the nitrogen (N) fertilizer can serve as another key factor for crop growth and yield formation. However, there is a severe unbalan...

Calibration, the estimation of model parameters based on fitting the model to experimental data, is among the first steps in many applications of process-based models and has an important impact on simulated values. We propose a novel method of developing guidelines for calibration of process-based models, based on development of recommendations fo...

Nitrous acid (HONO) is a major source of hydroxyl radicals in the troposphere through its photolysis, and can significantly influence ozone (O3) levels, thereby causing considerable crop yield losses. Previous studies have assessed relative crop yield losses by using exposure-response equations with observed or simulated O3, however, the contributi...

Potato is a staple food crop in the agro-pastoral ecotone (APE) of North China. However, the potato yield is low and highly variable due to limited water and nutrient availabilities in the region. Irrigation and nitrogen (N) fertilization have been used widely to enhance potato yield but result in negative environmental impacts in the APE. This stu...

Potato (Solanum tuberosom L.) is one of most important food crops in North China. Optimizing potato planting date and cultivar maturity is of great importance for increasing yield and reducing yield variability in North China. The APSIM-Potato model was calibrated and validated with field experimental data from a 2-year х 3-planting dates х 3-culti...

Supplemental Materials Title：Optimizing irrigation and nitrogen management for potato production in the agro-pastoral ecotone in North China

Predicting wheat phenology is important for cultivar selection, for effective crop management and provides a baseline for evaluating the effects of global change. Evaluating how well crop phenology can be predicted is therefore of major interest. Twenty-eight wheat modeling groups participated in this evaluation. Our target population was wheat fie...

Potato (Solanum tuberosum L.) is the fourth food crop around the world, following maize, wheat and rice. Potato production is of significance for ensuring national food security. Potato growth models have been used widely in narrowing potato yield gap, enhancing water and nitrogen use efficiency, adapting to climate change, and optimizing agronomic...

Predicting phenology is essential for adapting varieties to different environmental conditions and for crop management. Therefore, it is important to evaluate how well different crop modeling groups can predict phenology. Multiple evaluation studies have been previously published, but it is still difficult to generalize the findings from such studi...

Nitrous acid (HONO) is a major source of hydroxyl radicals in the troposphere through its photolysis, and can significantly influence ozone (O3) levels, thereby causing considerable crop yield losses. Previous studies have assessed relative crop yield losses by using exposure-response equations with observed or simulated O3, however, the contributi...

With continued global warming, the frequency and severity of heat wave events increased over the past decades, threatening both regional and global food security in the future. There are growing interests to study the impacts of drought on crop. However, studies on the impacts of heat stress on crop photosynthesis and yield are still lacking. To fi...

Calibration, the estimation of model parameters based on fitting the model to experimental data, is among the first steps in essentially every application of crop models and process models in other fields and has an important impact on simulated values. The goal of this study is to develop a comprehensive list of the decisions involved in calibrati...

Predicting wheat phenology is important for cultivar selection, for effective crop management and provides a baseline for evaluating the effects of global change. Evaluating how well crop phenology can be predicted is therefore of major interest. Twenty-eight wheat modeling groups participated in this evaluation. Our target population was wheat fie...

As an important secondary photochemical pollutant, peroxyacetyl nitrate (PAN) has been studied over decades, yet its simulations usually underestimate the corresponding observations, especially in polluted areas. Recent observations in north China found unusually high concentrations of PAN during wintertime heavy haze events, but the current model...

Increasing both grain yield and water use efficiency (WUE)/nitrogen partial factor productivity (NPFP) of winter wheat is crucial to realize the sustainable development of agricultural production in the North China Plain (NCP). This study was conducted to test the hypothesis that a trade-off between yield and efficiency could reduce water and nitro...

Improving winter wheat (Triticum aestivum L.) productivity and water use efficiency (WUE) in the North China Plain (NCP) is critical to maintain grain security and ease the water shortage in this region. This study was conducted to examine the optimal irrigation amount (OI) for winter wheat across the NCP and analyze its responses to the climate, s...

Understanding spatio-temporal changes in winter wheat (Triticum aestivum L) phenology and its response to temperature will be vital for adapting to climate change in the coming years. For this purpose, the heading date (HD), maturity date (MD), and length of the reproductive growth period (LRGP) were detected from the remotely sensed leaf area inde...

Strip intercropping increases land use efficiency but the effect on water use efficiency is less well-known. Here we develop a modelling method to simulate the growth of an intercrop taking into account the acquisition of light and water by the component species in order to calculate the efficacy of light and water acquisition in an intercropping s...

Climate change, with increased temperatures and varied rainfall, poses a great challenge to food security around the world. Appropriately assessing the impacts of climate change on crop productivity and understanding the adaptation potential of agriculture to climate change are urgently needed to help develop effective strategies for future agricul...

Timely monitoring of crop lands is important in order to make agricultural activities more sustainable, as well as ensuring food security. The use of Earth Observation (EO) data allows crop monitoring at a range of spatial scales, but can be hampered by limitations in the data. Crop growth modelling, on the other hand, can be used to simulate the p...

Wheat productivity in the North China Plain (NCP) is highly sensitive to climate change and varies greatly in spatial-temporal scale. Contrasting responses of wheat productivity to climate change were reported with different assessment methods. In this study, the impacts of climate warming (+ 2 °C) on wheat yields and yield gaps in the NCP were com...

Sugarcane is a staple sugar crop with a consistently large planting area in Dehong, a humid sugarcane region in Yunnan province, but data are lacking on the interaction effects of sowing date, water (rainfed and irrigated), and nitrogen management on sugarcane production. In this study, the suitability of APSIM-Sugar model (version 7.8) in a humid...

Ridge–furrow planting is often applied in semi-arid regions to reduce the drought risk on crop yield under rain-fed conditions. Sunflower (Helianthus annuus L.) is widely planted in northern China and how to reduce the drought risk on sunflower production remains a significant issue. A three-year field experiment with seven treatments (a flat plot...

Plant phenology, which describes the timing of plant development, is a major aspect of plant response to environment and for crops, a major determinant of yield. Since climate change is projected to alter crop phenology worldwide, there is a large effort to predict phenology as a function of environment. Many studies have focused on comparing model...

Publish by Guanghua Zheng, on Journal of Northeast Agricultural University, in 1978.

A glimpse of greenhouse photochemical reactions after fertilization and exchange with the outdoor atmosphere. Applying nitrogen (N) fertilizer increased soil emissions of HONO and NO in greenhouses, significantly enhance ROx (sum of hydroxyl, hydroperoxyl, and organic peroxy radicals) cycles, with biogenic volatile organic compound (BVOC) emissions...

Crop planting area mapping and phenology monitoring are of great importance to analyzing the impacts of climate change on agricultural production. In this study, crop planting area and phenology were identified based on Sentinel-1 backscatter time series in the test region of the North China Plain, East Asia, which has a stable cropping pattern and...

Southwestern China (SWC), one of the major rain-fed wheat production zones in China, has become vulnerable to drought in recent years under global climate change. To quantify drought severity during the wheat growing season and its impact on yield loss, we selected the Agricultural Production Systems sIMulator (APSIM) model to simulate wheat growth...

Oil sunflower is a staple oil-bearing crop with increasing plant area in recent years in the APE (agro-pastoral ecotone of North China). However, the shortage of water resources is a serious threat to oil sunflower production. Adjusting sowing date and applying supplemental irrigation are effective measures to increase the yield and ensure the stab...

Crop modelling has become an effective means to assess climate change impact on crop yield and to assist in development of adaptation strategies. Previous studies found large uncertainty in simulated crop yields, especially beyond optimal temperature range. In this paper, we combined the data reported in literature and our controlled-temperature ex...

Wheat production in Southwest China (SWC) plays a vital role in guaranteeing local grain security, but it is threatened by increasingly frequent seasonal drought in recent years. In spite of the importance, the impact of past climate change on wheat potential productivity and drought severity has not been properly addressed. In this study, we emplo...

Understanding the interactions of genotype (G) × environment (E) × management (M) and their impact on crop yield enables prediction of the performance of genotypes across environment. It can help select the most suitable cultivars in target regions and identify contributions of novel traits in crop breeding. In this study, we used the process-based...

Crop phenology is closely related to yield formation and crop management. Phenology module is one of the essential components that affect the call of model parameters and performance of whole model. We analyzed different algorithms of five widely used wheat models (WOFOST, CERES-Wheat, APSIM-Wheat, SPASS, and WheatSM) and studied the simulation acc...

Abstract

While process-based crop models are increasingly applied in multiple research areas, the role of model calibration and its data requirement have been rarely addressed. We used data for two canola cultivars measured across up to six sowing dates, five plant densities and three years to investigate how different data impacted on the efficacy of calib...

Accurate modelling of crop phenology is essential for evaluating how crops respond to future environmental and management changes. However, cultivar parameters are often estimated based on limited data and using a trial-and-error method, leading to uncertainties in simulated phenology and subsequent crop yield. In this paper we evaluated the abilit...

The aim of this study is to compare the impacts of climate change on the potential productivity and potential productivity gaps of sunflower (Helianthus annuus), potato (Solanum tuberosum), and spring wheat (Triticumaestivum Linn) in the agro-pastoral ecotone (APE) of North China. A crop growth dynamics statistical method was used to calculate the...

The suitability of four popular empirical and semi-empirical stomatal conductance models (Jarvis model, Ball-Berry model, Leuning model and Medlyn model) was evaluated based on parallel observation data of leaf stomatal conductance, leaf net photosynthetic rate and meteorological factors during the vigorous growing period of potato and oil sunflowe...

Southwest China (SWC) is one of the major canola production areas in China. Due to frequent seasonal drought during the canola growing season, irrigation plays a vital role in improving canola yields. However, the impact of irrigation and climate variations on canola yield and the yield gap (the difference between potential and rainfed yield) has n...

The impact of climate change on maize potential productivity and the potential productivity gap in Southwest China (SWC) are investigated in this paper. We analyze the impact of climate change on the photosynthetic, light-temperature, and climatic potential productivity of maize and their gaps in SWC, by using a crop growth dynamics statistical met...

Sowing date is one of the vital factors for determining crop yield. In this study, temporal and spatial variation of optimal sowing date of summer maize was analyzed by statistical model and the APSIM-Maize model in Henan Province, China. The results showed that average summer maize optimal sowing dates ranged from May 30 to June 13 across Henan Pr...

Crop phenology is related to the partitioning of assimilates to different organs, crop productivity and timing of crop management. Understanding the uncertainty in simulated crop phenology can help target future direction of model improvement and assess climate change impact more accurately. However, the uncertainty in maize phenology modelling acr...

Considering the characteristics of rice production and climate conditions in Southwest China, an agricultural drought monitoring model based on wetness index anomaly rate (Mp) by calculating the variation of deviation from average values of relative humid index was established, and was used to analyze the spatial-temporal distribution characteristi...

Field experimental data of winter wheat and parallel daily meteorological data at four typical stations in Chongqing City were used to calibrate and validate APSIM-wheat model and determine the genetic parameters for 12 varieties of winter wheat. The results showed that there was a good agreement between the simulated and observed growth periods fr...

Quantifying the changes in crop potential yields and yield gaps is essential to determine the yield-contributing and yield-limiting factors and enhance crop productivity. Here we combine simulation modeling and long-term maize yield records (1981–2009) from 10 sites to investigate the changes in maize yield potential, actual yield and yield gaps in...

Agriculture and pasture ecotone are typical ecologically vulnerable areas. Crop productivities and the agricultural sustainability are greatly affected by climate change in these areas. Field experiments were conducted from 2011 to 2013 in Inner Mongolia (41°06'N, 111°28'E) to investigate the influence of planting dates on yield and phenology of sp...

Recognizing that climate change will affect agricultural systems both through mean changes and through shifts in climate variability and associated extreme events, we present preliminary analyses of climate impacts from a network of 1137 crop modeling sites contributed to the AgMIP Coordinated Climate-Crop Modeling Project(C3MP).At each site sensit...

Cultivar selection is a dominant factor in crop production to obtain high yield. While previous studies have evaluated a range of impacts and adaptation of climate change (CC) on crop yield, few studies have focused on evaluating the effectiveness of changing cultivars with different vernalization requirements as an adaptation. In the present study...

Wheat is one of the most important crops in the world, and wheat models have been widely used to study yield responses to changes in management and climate. However, less information is available on how a wheat model performs in simulation of wheat response to changes in varieties, sowing dates and planting densities across space. This study presen...

In the North China Plain, the grain yield of irrigated wheat-maize cropping system has been steadily increasing in the past decades under a significant warming climate. This paper combined regional and field data with modeling to analyze the changes in the climate in the last 40 years, and to investigate the influence of changes in crop varieties a...

The North China Plain (NCP) is the most important agricultural production area in China. Crop production in the NCP is sensitive to changes in both climate and management practices. While previous studies showed a negative impact of climatic change on crop yield since 1980s, the confounding effects of climatic and agronomic factors have not been se...

The study used a modelling approach to assess the potential impacts of likely climate change and increase in CO2 concentration on the wheat growth and water balance in Murray–Darling Basin in Australia. Impacts of individual changes in temperature, rainfall or CO2 concentration as, well as the 2050 and 2070 climate change scenarios, were analysed....

Quantifying diurnal patterns of water use efficiency (WUE) and radiation use efficiency (RUE) for wheat and maize is important for assessing water use by plants and crop productivity. Water and carbon dioxide fluxes from an irrigated wheat-maize double-crop field from November 2002 to October 2003 were measured using the Eddy Covariance method. Evi...

The North China Plain (NCP) is the main winter wheat production area in China. However, grain yield of winter wheat is often threatened by drought, leading to a high risk of yield. Assessment on yield risk and study on how to reduce yield risk by appropriate irrigations could provide suitable instructions for irrigation management and increasing yi...

A simulation study was carried out to assess the potential sensitivity of wheat growth and water balance components to likely climate change scenarios at Wagga Wagga, NSW, Australia. Specific processes considered include crop devel-opment, growth rate, grain yield, water use efficiency, evapotranspiration, runoff and deep drainage. Individual impac...

Based on the change of the reference crop evapotranspiration and crop water requirement during development stage of maize in recent 26 years in three provinces of Northeast China, combined with the climate change scenario A2 (concentration on the economic development) and B2 (concentration on the sustainable development) of Special Report on Emissi...

Understanding the exchange processes of energy and carbon dioxide (CO2) in the soil–vegetation–atmosphere system is important for assessing the role of the terrestrial ecosystem in the global water and carbon cycle and in climate change. We present a soil–vegetation–atmosphere integrated model (ChinaAgrosys) for simulating energy, water and CO2 flu...

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 cano...

Continued global warming and associated changes in regional rainfall patterns have raised concerns for the sustainability of many agricultural industries in Australia and the World. Examining adaptation options to cope with changed regional climate conditions have often involved simulating the mitigating effects of management interventions e.g. shi...

CO2 flux was measured continuously in a wheat and maize rotation system of North China Plain using the eddy covariance technique to study the characteristic of CO2 exchange and its response to key environmental factors. The results show that nighttime net ecosystem exchange (NEE) varied exponentially with soil temperature. The temperature sensitivi...

There is a growing concern about excessive nitrogen (N) and water use in agricultural systems in North China due to the reduced resource use efficiency and increased groundwater pollution. A two-year experiment with two soil moisture by four N treatments was conducted to investigate the effects of N application rates and soil moisture on soil N dyn...

A model was developed that couples canopy photosynthesis and transpiration of winter wheat. The model combined a two-layer evapotranspiration model with a coupled photosynthesis–stomatal conductance model to study the diurnal variations of CO2, water and heat fluxes of winter wheat. Field experiments were conducted in Yucheng Comprehensive Experime...

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...

We constructed a coupled model for simulating plant photosynthesis and evapotranspiration (CPCEM). In the model, non-rectangular hyperbola is used to simulate leaf photosynthesis rate that is scaled up to estimate canopy gross photosynthesis rate by an integral method. Whole canopy in the model is separated into multi-layers, each of which is divid...

A coupled model of winter wheat photosynthesis-evapotranspiration was established based on SPAC theory. Sensible heat and latent heat fluxes were calculated by two-layer model proposed by Shuttleworth and Wallace, and photosynthesis and evapotranspiration were coupled by the parameterization of canopy resistance. The model was validated with the da...