生态学杂志2024，Vol.43Issue(8)：2421-2432,12.DOI:10.13292/j.1000-4890.202408.014
松嫩平原春玉米全生育期干旱特征
Drought characteristics of spring maize during the whole growth period in Songnen Plain
摘要
Abstract
The drought characteristics and trend of spring maize in Songnen Plain were studied by using the meteor-ological data from 2001 to 2020 and the crop water deficit index(CWDI).The results showed that during the whole growth period of spring maize,the variation trend of precipitation and water demand in Songnen Plain was similar,both showed a trend of first rising and then decreasing,and peaked in mid-late July.CWDI showed a trend of de-creasing first and then rising,and reached the lowest value in the mid-late July.Drought was more severe in the early and late stages of growth.A trend of drying occurred in whole growth stage,seeding-emerging stage,and heading-milking stage,while a trend of wetting occurred in emerging-heading stage and milking-ripening stage,with such trends being significant except for the emerging-jointing stage,and the drought gradually shifted to the late stage of growth.In each growth stage,the influence scope of light drought was predominant,followed by moder-ate drought,severe drought,and extreme drought.Spatially,drought occurrence frequency was generally higher in the west and lower in the east,and higher in the north and lower in the south.It is necessary to strengthen the mo-nitoring and early warning of drought in the future and increase the input of drought disaster prevention,which can provide strong guarantee for stable yield and supply of maize.关键词
水分亏缺指数/干旱/春玉米/松嫩平原Key words
crop water deficit index/drought/spring maize/Songnen Plain引用本文复制引用
张富国,段居琦,蒋志慧,靳亚忠,张有利..松嫩平原春玉米全生育期干旱特征[J].生态学杂志,2024,43(8):2421-2432,12.基金项目
中国气象局创新发展专项(CXFZ2023J043)、中央引导地方科技发展专项(DQKJJYD-0002)和黑龙江省"双一流"新一轮建设学科协同创新成果建设项目(LJGXCG2022-107)资助. （CXFZ2023J043）
