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Quantifying Multi-hazards and Impacts Over Different growth periods of Maize:A Study Based on Index Construction

International Journal of Disaster Risk Science 2023年第5期14卷 822-839页

作者： Dan Chen Ying Guo Rui Wang Yunmeng Zhao Kaiwei Li Jiquan Zhang Xingpeng Liu Zhijun Tong Chunli Zhao School of Environment Northeast Normal UniversityChangchun130024China Jilin Province Science and Technology Innovation Center of Agro-Meteorological Disaster Risk Assessment and Prevention Northeast Normal UniversityChangchun130024China Key Laboratory for Vegetation Ecology Ministry of EducationChangchun130024China State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration Northeast Normal UniversityChangchun130024China College of Forestry and Grassland Jilin Agricultural UniversityChangchun130024China

Owing to the complexity and variability of global climate,the study of extreme events to ensure food security is particularly *** standardized precipitation requirement index(SPRI)and chilling injury index(I_(Ci))were introduced using data from agrometeorological stations on the Songliao Plain between 1981 and 2020 to identify the spatial and temporal variability of drought,waterlogging,and low-temperature cold damage during various maize growth *** drought and low-temperature cold damage events(CDLEs)and compound waterlogging and low-temperature cold damage events(CWLEs)were then *** measure the intensity of compound events,the compound drought and low-temperature cold damage magnitude index(CDLMI),and compound waterlogging and low-temperature cold damage magnitude index(CWLMI)were constructed by fitting marginal ***,the effects of extreme events of various intensities on maize output were *** findings demonstrate that:(1)There were significant differences in the temporal trends of the SPRI and ICiduring different maize growth *** predominated in the middle growth period(MP),waterlogging predominated in the early growth period(EP)and late growth period(LP),and both drought and waterlogging tended to increase in intensity and *** frequency of low-temperature cold damage showed a decreasing trend in all periods.(2)The CDLMI and CWLMI can effectively determine the intensity of CDLEs and CWLEs in the study area;these CDLEs and CWLEs had higher intensity and frequency in the late growth period.(3)Compared to single events,maize relative meteorological yield had a more significant negative correlation with the CDLMI and CWLMI.

关键词： Compound events magnitude index Drought growth periods Low-temperature cold damage Spatiotemporal distribution Waterlogging

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Stability of growth periods traits for soybean cultivars across multiple locations

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Journal of Integrative Agriculture 2016年第5期15卷 963-972页

作者： WANG Xiao-bo LIU Zhang-xiong YANG Chun-yan XU ran LU Wei-guo ZHANG Li-feng WANG Qian WEI Su-hong YANG Chun-ming WANG Hui-cai WANG Rui-zhen ZHOU Rong CHEN Huai-zhu CHANG Ru-zhen QIU Li-juan National Key Facility for Gene Resources and Genetic Improvement/Key Laboratory of Crop Germplasm Utilization Ministry of Agriculture/Institute of Crop Sciences Chinese Academy of Agricultural Sciences Beijing 100081 P.R. China School of Agronomy Anhui Agricultural University Hefei 230036 P.R. China Institute of Cereal and Oil Crops Hebei Academy of Agriculture and Forestry Sciences/Shijiazhuang Sub-Center National Soybean Improvement Center/Huang-Huai-Hai Key Laboratory for Biology and Genetic Improvement of Soybean Ministry of Agriculture/Hebei Genetic Breeding Laboratory Shijiazhuang 050035 P.R. China Institute of Crop Sciences Shandong Academy of Agricultural Sciences Jinan 250010 P.R. China Institute of Industrial Crops Research Henan Academy of Agricultural Sciences Zhengzhou 450002 P.R.China Crop Breeding Institute Heilongjiang Academy of Agricultural Sciences Harbin 150086 P.R.China Soybean Research Institute Jilin Academy of Agricultural Sciences Changchun 130124 P.R. China Agricultural Science Institute of Chifeng Chifeng 024031 P.R.China Institute of Crop Sciences Jiangxi Academy of Agricultural Sciences Nanchang 330200 P.R. China Oil Crop Research Institute Chinese Academy of Agricultural Sciences Wuhan 430062 P.R.China Institute of Industrial Crops Research Guangxi Academy of Agricultural Sciences Nanning 530007 P.R. China

The growth periods（GPs, from planting/emergence to reproductive stage 8（R8） of soybean cultivars vary in different ecological regions, especially in China with a very complex soybean cropping system. In this study, a 3-yr experimental study was undertaken in three geographical locations of China from 2008 to 2010, including the Northeast（40.66-45.85°N）, Huang-Huai（34.75-38.04°N） and southern（22.82-30.60°N） eco-regions with about 250 accessions in each region to clarify the classification of maturity group（MG） and identify the cultivars with stable GP to increase the knowledge about the GP distribution of soybean cultivars in China. GPs of soybean cultivars in different eco-regions were significant different with a gradual decrease from 115-125 d in the Northeast part to the 85-100 d in the southern part of China. The geographical location was the major factor for GP of cultivars from the Northeast, while the year of planting was the major factor affecting the stability of GPs in Huang-Huai summer and southern summer soybean. AMMI2（additive main effects and multiplicativeinteraction）-Biplot analysis showed that the GPs of soybean cultivars from the Northeast eco-region have a comparatively satisfactory environmental stability. Moreover, soybean cultivars with moderate GP/MG and stable environment adaptability in different eco-regions were identified based on the linear regression and AMMI analysis, which was important for the accurate classification of soybean MGs in future. Taken together, our results reflected the genetic diversity, geographical distribution and environmental stability of the Chinese soybean GP trait. Soybean cultivars with stable GP for various Chinese eco-regions would be beneficial for Chinese soybean genetic improvement, varietal introduction, exchange, and soybean breeding program for wide adaptability.

关键词： soybean growth periods maturity group environmental stability

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Key indicators affecting maize stalk lodging resistance of different growth periods under different sowing dates

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Journal of Integrative Agriculture 2020年第10期19卷 2419-2428页

作者： WANG Qun XUE Jun CHEN Jiang-lu FAN Ying-hu ZHANG Guo-qiang XIE Rui-zhi MING Bo HOU Peng WANG Ke-ru LI Shao-kun Key Laboratory of Oasis Eco-Agriculture Xinjiang Production and Construction Corps/agricutura1 CollegeShihezi UniversityShihezi 832000P.R.China Institute of Crop Sciences Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Physiology and EcologyMinistry of Agriculture and Rural AffairsBejjing 100081P.R.China Research Institute of Agricultural Sciences Sixth Division of Xinjiang Production and Construction CorpsWujiaqu 831300P.R.China Chuxiong State Research and Extension Institute of Agricultural Science Chuxiong 675000P.R.China

The accurate evaluation of maize stalk lodging resistance in different growth periods enables timely management of lodging risks and ensures stable and high maize ***,we established five diferent sowing dates to create diferent conditions for maize *** evaluated the effects of the different growth conditions on lodging resistance by determining stalk morphology,moisture content,mechanical strength and dry matter,and the relationship between stalk breaking force and these indicators during the silking stage(R1),milk stage(R3),physiological maturity stage(R6),and 20 days after *** height at R1 positively affected stalk breaking *** R3,the cofficient of ear height and the dry weight per unit length of basal internodes were key indicators of stalk lodging *** R6,the key indicators were the coefficient of the center of gravity height and plant fresh *** R6,the key indicator was the coefficient of the center of gravity *** crushing strength of the fourth internode correlated significanty and positively with the stalk breaking force from R1 to R6,which indicates that crushing strength is a reliable indicator of stalk mechanical *** results suggest that high stalk strength and low ear height beneft lodging resistance prior to *** and after R6,the cofficient of the center of gravity height and the mechanical strength of basal internodes can be used to evaluate plant lodging resistance and the appropriate time for harvesting in fields with a high lodging risk.

关键词： maize lodging resistance stalk strength growth periods breaking force

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