Study on Waterlogging Risk of Summer Maize in Henan Province Based on Accumulated Humidity Index
Yu Weidong
Zhang Guangzhou
Xue Changying
Ma Meijuan
Abstract：Based on the daily meteorological data of 113 stations in Henan Province during 1971-2020 and the daily soil relative humidity data at 10-50 cm depth from 86 automatic soil moisture observa-tion stations during 2011-2020,the percentage of precipitation anomaly(Pa),Z index,K index and ac-cumulated humidity index(Ma)were selected,and the correlation coefficients between soil relative hu-midity in each layer and four water indexes were compared and analyzed,and the waterlogging of summer maize in Henan Province was determined based on the accumulated wetness index.Furthermore,the spa-tial distribution of waterlogging risk was evaluated by integrating the average summer maize planting area proportion in 108 major grain-producing counties(cities)over the past five years and the accumulated moisture index.The results are as follows:(1)The correlation coefficient between Ma and soil relative humidity is higher than the other three water indexes,with the best correlation coefficient between Ma and soil relative humidity of 20 cm.According to the quantitative relationship between Ma and soil relative hu-midity,it is determined that 0.5<Ma≤1.3 is light waterlogging,1.3<Ma≤3.0 is medium waterlogging,and Ma>3.0 is heavy waterlogging.(2)The waterlogging risk of summer maize in Henan Province mainly appeared in jointing-tasseling stage,followed by the emergence-jointing stage;High-risk areas are mainly distributed in central and eastern Nanyang,Zhumadian,Zhoukou and Shangqiu,with a comprehensive risk index from 10 to 20;In addition,regions such as Xinxiang,Hebi,and western Anyang in the eastern Taihang Mountains exhibit relatively high waterlogging risk during the jointing-tasseling stage.(3)The risk of waterlogging in tasseling to milking stage and milking to ripening stage is generally low,and the risk index in most areas is between 5 and 10.
Keywords：accumulated moisture indexwaterloggingsummer maizeHenan Province
Publication Date：2026-05-30
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：9( 37-45 )