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Innovation of the double-maize cropping system based on cultivar growing degree days for adapting to changing weather conditions in the North China Plain

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Journal of Integrative Agriculture 2020年第12期19卷 2997-3012页

作者： WANG Dan LI Guo-rui ZHOU Bao-yuan ZHAN Ming CAO Cou-gui MENG Qing-feng XIA Fei MA Wei ZHAO Ming College of Plant Science and Technology Huazhong Agriculturial University/Key Laboratory of Crop PhysiologyEcology and Cultivation(Middle Reaches of the Yangtze River)Ministry of Agriculture and Rural AffairsWuhan 430070P.R.China Institute of Crop Sciences Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology&EcologyMinistry of Agriculture and Rural AffairsBeijing 100081P.R.China Insititute of Maize Science Tongliao Academy of Agricultural SciencesTongliao 028042P.R.China College of Life Science Inner Mongolia University for the NationalitiesTongliao 028000P.R.China College of Agronomy and Biotechnology China Agricultural UniversityBeijing 100193P.R.China

Double-maize cropping system is an effective option for coping with climate change in the North China Plain. However, the effects of changes in climate on the growth and yield of maize in the two seasons are poorly understood. Forty-six cultivars of maize with different requirements for growing degree days (GDD), categorized as high (H), medium (M) or low (L), and three cultivar combinations for two seasons as LH (using JD27 and DMY1 from category L in the first season;and YD629 and XD22 from category H in the second season), MM (using JX1 and LC3 from category M in the first season;and ZD958 and JX1 from category M in the second season) and HL (using CD30 and QY9 from category H in the first season;and XK10 and DMY3 from category L in the second season) were tested to examine the eco-physiological determinants of maize yield from 2015 to 2017. The correlations between the combinations of cultivars and grain yield were examined. The combination LH produced the highest annual grain yield and total biomass, regardless of the year. It was followed, in decreasing order, by MM and HL. Higher grain yield and biomass in LH were mainly due to the greater grain yield and biomass in the second season, which were influenced mainly by the lengths of the pre- and post-silking periods and the rate of plant growth (PGR). Temperature was the primary factor that influenced dry matter accumulation. In the first season, low temperatures during pre-silking decreased both the duration and PGR in LH, whereas high temperatures during post-silking decreased the PGR in MM and HL, resulting in no significant differences in biomass being observed among the three combinations. In the second season, high temperatures decreased both the PGR and pre- and post-silking duration in MM and HL, and consequently, the biomass of those two combinations were lower than that in LH. Moreover, because of lower GDD and radiation in the first season and higher grain yield in the second season, production effic

关键词： double-maize cropping system weather conditions grain yield North China Plain

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Maize kernel weight responses to sowing dateassociated variation in weather conditions

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The Crop Journal 2017年第1期5卷 43-51页

作者： Baoyuan Zhou Yang Yue Xuefang Sun Zaisong Ding Wei Ma Ming Zhao Institute of Crop Sciences Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology and ProductionMinistry of AgricultureBeijing 100081China Beijing Computing Center Beijing 100094China

Variation in weather conditions during grain filling has substantial effects on maize kernel weight(KW). The objective of this work was to characterize variation in KW with sowing date-associated weather conditions and examine the relationship between KW, grain filling parameters, and weather factors. Maize was sown on eight sowing dates(SD) at 15–20-day intervals from mid-March to mid-July during 2012 and 2013 in the North China Plain. With sowing date delay, KW increased initially and later declined, and the greatest KW was obtained at SD6 in both years. The increased KW at SD6 was attributed mainly to kernel growth rate(Gmean), and effective grain-filling period(P). Variations in temperature and radiation were the primary factors that influenced KW and grain-filling parameters. When the effective cumulative temperature(AT) and radiation(Ra)during grain filling were 950 °C and 1005.4 MJ m-2, respectively, P and KW were greatest. High temperatures(daily maximum temperature [Tmax] > 30.2 °C) during grain filling under early sowing conditions, or low temperatures(daily minimum temperature [Tmin] conditions combined with high diurnal temperature range(Tmax-min> 7.1 °C) decreased kernel growth rate and ultimately final KW. When sowing was performed from May 25 through June 27, higher KW and yield of maize were obtained. We conclude that variations in environmental conditions(temperature and radiation) during grain filling markedly affect growth rate and duration of grain filling and eventually affect kernel weight and yield of maize.

关键词： Maize Sowing date weather conditions Kernel weight Grain filling

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Performance Analysis of Curved Track G2T-FSO(Ground-to-Train Free Space Optical)Model under Various weather conditions

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Computer Modeling in Engineering & Sciences 2024年第12期141卷 2087-2105页

作者： Mohammed A.Alhartomi Mohammad F.L.Abdullah Wafi A.B.Mabrouk Mohammed S.M.Gismalla Ahmed Alzahmi Saeed Alzahrani Mohammad R.Altimania Mohammed S.Alsawat Department of Electrical Engineering University of TabukTabuk71491Saudi Arabia Faculty of Electrical and Electronic Engineering Universiti Tun Hussein Onn Malaysia(UTHM)Johor86400Malaysia Center for Communication Systems and Sensing King Fahd University of Petroleum and Minerals(KFUPM)Dhahran31261Saudi Arabia Department of Mechanical Engineering University of TabukTabuk71491Saudi Arabia

The demand for broadband data services on high-speed trains is rapidly growing as more people commute between their homes and ***,current radio frequency(RF)technology cannot adequately meet this *** order to address the bandwidth constraint,a technique known as free space optics(FSO)has been *** paper presents a mathematical derivation and formulation of curve track G2T-FSO(Ground-to-train Free Space Optical)model,where the track radius characteristics is 2667 m,divergence angle track is 1.5°for train velocity at V=250 km/*** transmitter configurations are proposed to maximize coverage range and enhance curve track G2T-FSO link performance under varying weather *** curved track G2T-FSO model was evaluated in terms of received power,signal-to-noise ratio(SNR),bit error rate(BER),and eye *** results showed maximum coverage lengths of 618,505,365,and 240 m for 4Tx/1Rx,3Tx/1Rx,2Tx/1Rx,and 1Tx/1Rx configurations,*** analyzed results demonstrate that the G2T-FSO link can be effectively implemented under various weather conditions.

关键词： Free space optics curve track ground-to-train communications geometrical loss weather conditions

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Influences of harvester and weather conditions on field loss and milling quality of rough rice

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International Journal of Agricultural and Biological Engineering 2017年第4期10卷 216-223页

作者： Ragab Khir Griffiths Atungulu Ding Chao Zhongli Pan Department of Biological and Agricultural Engineering University of CaliforniaDavisCA 95616USA Department of Agricultural Engineering Faculty of AgricultureSuez Canal UniversityIsmailiaEgypt Department of Food Science University of ArkansasFayettevilleAR 72701USA College of Food Science and Engineering Nanjing University of Finance and EconomiesNanjingJiangsu 210023China Healthy Processed Foods Research Unit Western Regional Research CenterAgricultural Research ServiceU.S.Department of AgricultureAlbanyCA 94710USA

A better understanding of factors affecting field losses and milling quality during harvest is needed to improve the economic value of *** main objective of this study was to evaluate the impact of harvester header,harvester type,and weather conditions on field loss and milling quality of rough *** popular harvesters equipped with different headers:John Deere 9870 with header D60-S,John Deere 9860 with header D972-S,Hardy,and John Deere 9770 with stripper header were evaluated in this *** header and total field losses of rice were evaluated for each harvester under regular,rainy and windy weather *** were conducted in a rice field cultivated with medium grain rice,variety M206,at Grimes,*** rice yield(TRY),head rice yield(HRY)and whiteness index(WI)were examined to evaluate the effect of weather conditions on milling *** obtained results revealed that the rice field loss was affected by harvester header and type,and weather *** the conventional headers,D60-S significantly reduced the rice loss compared to the D972-S and the *** with John Deere 9860 resulted in significant header and field loss compared to other tested *** average loss increased from 236.2 kg/hm^(2)and 445.2 kg/hm^(2)under regular condition to 711.1 kg/hm^(2)and 907.9 kg/hm^(2)under windy condition for John Deere 9870 and John Deere 9860,*** corresponding loss percentages increased from 2.6%and 4.9%to 7.9%and 10.1%.HRY was significantly affected by weather condition at harvest ***,the weather condition had no significant effect on TRY and *** minimize the rice field loss and obtain good milling quality,commercial rice harvesting during regular weather conditions is important.A proper combination of harvester type and header could be vital for reducing the rice loss.

关键词： rice harvesters field loss weather conditions milling quality harvester header

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The Effect of weather conditions on Pediatric Supracondylar Humerus Fractures

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Open Journal of Orthopedics 2021年第10期11卷 308-314页

作者： Şükrü Demir Sefa Key Murat Gürger Department of Orthopedics Firat University Hospital Firat University Elazig Turkey Department of Orthopedics Bingol State Hospital Ministry of Health Bingol Turkey

Background: Environmental conditions are effective on childhood supracondylar humerus fractures. In this study, we evaluated the relationship between weather conditions and these fractures. Materials and Methods: We started this study following the approval of a non-interventional research ethics committee. Patients (and July 2018 with supracondylar humerus fractures were included in the study. The hospital’s PROBEL system was used to diagnose (International Classification of the Diseases, ICD, S42.4) radiological images and patient information. Information on the weather conditions in the day and time period, in which supracondylar humerus fracture occurred, was obtained from TR

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Analysis of weather conditions for Aerial Security and Optimization in Maroua-Salak

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Atmospheric and Climate Sciences 2022年第1期12卷 172-188页

作者： Daïka Augustin Igri Moudi Pascal Mounabbahou Mal Oumarou Mbane Biouele Cesar Department of Meteorology and Climatology National Advanced School of Engineering University of Maroua Maroua Cameroon Laboratory of Earth’s Atmosphere Physics Faculty of Science University of Yaoundé 1 Yaoundé Cameroon Climate Application and Prediction Centre of Central Africa (CAPC-AC) Douala Cameroon Laboratory of Environmental Modeling and Atmospheric Physics Department of Physics Faculty of Science University of Yaoundé 1 Yaoundé Cameroon

In this study, the weather conditions of the accident at Maroua-Salak airport on 02 August 2020 are analyzed. This C130 aircraft accident took place under bad weather conditions. This bad weather is diagnosed using the models as CFS, GFS and GEFS that reanalyze outputs of the results. At the end of this re-analysis, the result obtained shows that the event which took place at the Maroua-Salak airport was predictable. However, the analysis of these results has made it possible to present the rainfall cumul between 05 and 10 mm for this day. In addition, a comparative study of the rainfall cumul obtained by the CFS, GFS and GEFS models and that estimated by the satellites has been carried out. These models can significantly improve the prevention of such disasters in the region.

关键词： weather conditions Maroua-Salak Airport Models Rainfall Cumul

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The relationship between ischemic stroke and weather conditions in Duzce, Turkey

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World Journal of Emergency Medicine 2015年第3期6卷 207-211页

作者： Harun Gunes Hayati Kandis Ayhan Saritas Suber Dikici Ramazan Buyukkaya Department of Emergency Medicine Duzce University School of Medicine Department of Neurology Duzce University School of Medicine Department of Radiology Duzce University School of Medicine

BACKGROUND: weather conditions are thought to increase the risk of stroke occurrence. But their mechanism has not yet been clarified. We investigated possible relationships between ischemic stroke and weather conditions including atmospheric pressure, temperature, relative humidity, and wind ***: One hundred and twenty-eight patients with ischemic stroke who had been admitted to our hospital between January 1 and December 31, 2010 were enrolled in this study. We investigated the relationship between daily cases and weather conditions the same day or 1, 2, and 3 days before ***: A negative correlation was found between maximum wind speed and daily cases 3 days before stroke. As the relationship between daily cases and changes of weather conditions in consecutive days was evaluated, a negative correlation was found between daily cases and change of atmospheric pressure in the last 24 ***: The maximum wind speed 3 days before stroke and change of atmospheric pressure in the last 24 hours were found to increase the cases of ischemic stroke. We recommend that individuals at risk of ischemic stroke should pay more attention to preventive measures, especially on days with low maximum wind speed, on subsequent 3 days, and on days with low atmospheric pressure in the last 24 hours.

关键词： weather conditions Ischemic stroke Turkey

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Classification of ozone pollution and analysis of meteorological factors in the Yangtze River Delta

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Big Earth Data 2023年第2期7卷 318-337页

作者： Yu Cao Yuanhao Qu Jinghui Ma Shanghai Typhoon Institute Shanghai Meteorological ServiceShanghaiChina Shanghai Key Laboratory of Meteorology and Health Shanghai Meteorological ServiceShanghaiChina Department of Atmospheric and Oceanic Sciences&Institute of Atmospheric Sciences Fudan UniversityShanghaiChina

Serious regional ozone(O_(3))pollution often plagues the Yangtze River Delta(YRD).The formation mechanism of these regional pollution events,including the meteorological and emission factors leading to these pollution events and how to affect the distribution of O_(3),still needs further research and *** this study,we first define the standard of O_(3)regional pollution in the YRD,and then select 248 regional pollution cases from 2015 to 2020 according to the defined *** the pollution cases in pollution months(May and June),PCT(principal component analysis in T-mode)classification method is used to classify the ozone concentration distribution in YRD *** regional distribution of the O_(3)concentrations in the YRD is divided into five types,and the overall type(Type 1)accounts for 15%,which is related to the control of YRD area by high-pressure *** the control of high pressure,the weather is sunny with the high temperature,and this weather condition is favorable for ozone generation and intercity transmission,causing extensive *** double center type(Type 2)accounts for 8%.This type of YRD is controlled by the front of the high pressure(the high-pressure center is located in North China),and the weather in the middle and north is conducive to the generation and transmission of O_(3).Inland type(Type 3)accounts for 24%.The main body of this type of high pressure is located in *** easterly wind in YRD area is conducive to the inland transmission of O_(3)*** northern coastal type(Type 4)accounts for 44%.This type of YRD area is mainly controlled by the weak pressure *** weather in the northern coastal area is sunny and the solar radiation for a long time is conducive to the formation of O_(3).The southern coastal type(Type 5)accounts for 10%,the solar radiation is strong in the southern region mainly under the influence of the post-offshore high *** study provides new insights into the relati

关键词： O_(3)pollution classification Yangtze River Delta weather conditions

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Coping with drought? The hidden microhabitat selection and underground movements of amphisbaenians under summer drought conditions

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Current Zoology 2024年第5期70卷 647-658页

作者： JoséMartín Gonzalo Rodríguez-Ruiz JoséJavier Cuervo Departamento de Ecología Evolutiva Museo Nacional de Ciencias NaturalesCSICMadridSpain

Habitat selection is a dynamic process that depends on many environmental variables that can vary with weather *** is important because,within a context of global change,extreme weather events,such as severe droughts,are predicted to become more *** examined the patterns of microhabitat selection and underground movements(using PIT-tag telemetry)of a strictly fossorial reptile,the North African checkboard amphisbaenian Trogonophis wiegmanni,during the summer drought *** aimed to test whether changes in strategies of habitat use and movements could allow this amphisbaenian to cope with unfavorable *** found that during the summer drought period,*** did not use the microhabitats in relationship to their availability,but particularly selected sites with high abundance of rocks but also areas under a high cover of bushes,where environmental conditions were more *** also found,using PIT-tag telemetry,that the numbers of *** individuals located under rocks and their activity(number of days with movements)decreased largely in ***,the animals were not entirely inactive,but,especially males were active below the ground under bushes and made some relatively long underground hidden movements between favorable areas.

关键词： arid environments fossoriality habitat selection movement ecology Trogonophis wiegmanni weather conditions

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Coping with drought?Effects of extended drought conditions on soil invertebrate prey and diet selection by a fossorial amphisbaenian reptile

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Current Zoology 2023年第4期69卷 367-376页

作者： José Martín Jesús Ortega Roberto García-Roa Gonzalo Rodríguez-Ruiz Ana Pérez-Cembranos Valentín Pérez-Mellado Departamento de Ecología Evolutiva Museo Nacional de Ciencias NaturalesCSICMadridSpain Institute of Evolutionary Biology CSIC-Universitat Pompeu FabraBarcelonaSpain Ethology Lab Cavanilles Institute of Biodiversity and Evolutionary BiologyUniversity of ValenciaValenciaSpain Departamento de Biología Animal Universidad de SalamancaSalamancaSpain

Arid climates are characterized by a summer drought period to which animals seem ***,in some years,the drought can extend for unusually longer *** the effects of these current extreme weather events on biodiversity can help to understand the effects of climate change,as models predict an increase in drought ***,we examined the effects of“unusual”extended drought on soil invertebrate prey availability and on diet composition(based on fecal contents)and diet selection of a fossorial amphisbaenian,the checkerboard worm lizard Trogonophis *** data show interannual variations in summer drought *** abundance and diversity of soil invertebrates in spring were high,and similar to those found in a“normal”early autumn,after some rain had ended with the summer *** contrast,in years with“unusual”extended drought,abundance,and diversity of soil invertebrates in early autumn were very ***,there were seasonal changes in amphisbaenians’diet;in autumn with drought,prey diversity,and niche breadth decreased with respect to spring and autumns after some rain had *** did not eat prey at random in any season,but made some changes in prey selection that may result from drought-related restrictions in prey ***,in spite that amphisbaenians showed some feeding flexibility,their body condition was lower in autumn than in spring,and much lower in autumn with *** extended drought became the norm in the future,amphisbaenians might suffer important negative effects for their health state.

关键词： amphisbaenians drought feeding ecology soil invertebrates Trogonophis wiegmanni weather conditions

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