摘要
基于1971—2018年黑龙江省69个气象台站逐日气象资料,利用联合国粮农组织(FAO)推荐方法计算玉米需水量,应用美国农业部土壤保持局推荐方法计算有效降水量,采用Mann-Kendall检验、GIS反距离加权插值等方法分析黑龙江省玉米需水量与有效降水量耦合度及其演变特征。结果表明:黑龙江省玉米拔节以前生育时段大部地区有效降水增加,拔节以后各生育阶段大部地区有效降水呈减少趋势,不同区域变化趋势略有不同。受风速变小和日照时间减少等气象因子影响,黑龙江省大部地区玉米需水量减少,东部减速最快,北部最慢。黑龙江省中部和东北部玉米需水量与有效降水量耦合度较高,西部较低;拔节以前耦合度较低,拔节以后较高。各区域耦合度均呈“两落两起”变化趋势,2011—2012年为耦合度由低到高明显突变点。
Based on the daily meteorological data from 69 meteorological stations from 1971 to 2018,the method recommended by FAO was used to calculate the water need by maize.In addition,the effective precipitation was calculated using the U.S.Department of Agriculture Soil Conservation method.Mann-Kendall test and GIS inverse distance weighted interpolation were used to analyze the coupling degree between maize water need and effective precipitation and its evolution characteristics in Heilongjiang province.The results showed that the effective precipitation increased in most areas during the growth period before maize jointing in Heilongjiang province,but it decreased in most areas during the growth period after maize jointing,and the changing trend was slightly different in different regions.Affected by meteorological factors such as the decrease in wind speed and daylight hours,the maize water need in most areas of Heilongjiang province decreased,and the speed of deceleration was the fastest in the east and the slowest in the north.The coupling degree of maize water requirement and effective precipitation was higher in the middle and northeast of Heilongjiang province,and it was lower in the west;the coupling degree was lower before jointing,and it was higher after jointing.The coupling degree of each region showed a trend of decrease-increase-decrease-increase in Heilongjiang province.From 2011 to 2012,it was the obvious mutation point of the coupling degree from low to high.
作者
曲辉辉
王冬冬
闫敏慧
翟墨
刘丹
闫平
王晓明
姜丽霞
QU Hui-hui;WANG Dong-dong;YAN Min-hui;ZHAI Mo;LIU Dan;YAN Ping;WANG Xiao-ming;JIANG Li-xia(Heilongjiang Provincical Institute of Meteorological Science/Innovation and Opening laboratory of Regional Eco-Meteorology in Northeast,China Meteorological Administration/Meteorological Academician Workstation of Heilongjiang Province,Harbin 150030,China;Executive Service Center,Heilongjiang Provincial Meteorological Service,Harbin 150030,China;Heilongjiang Provincial Meteorological Service Center,Harbin 150030,China;Meteorological Data Center of Heilongjiang Province,Harbin 150030,China)
出处
《气象与环境学报》
2022年第5期81-87,共7页
Journal of Meteorology and Environment
基金
中国气象局·河南省农业气象保障与应用技术重点开放实验室项目(AMF202105)
东北区域气象中心科技创新联合攻关任务合作项目(2019QYLH3)
黑龙江省科学基金项目(LH2020D017)
中国气象局沈阳大气环境研究所中央级公益性科研院所基本科研业务费项目(2018SYIAEHZ1)
中国气象局沈阳大气环境研究所和辽宁省农业气象灾害重点实验室开放基金重点项目(2019SYIAE04)共同资助。
关键词
玉米需水量
有效降水量
耦合度
Water need of maize
Effective precipitation
Coupling degree
