中国农学通报2025，Vol.41Issue(35)：80-87,8.
额尔古纳兴安落叶松物候期与季节性冻土关系研究
Study on Relationship Between Seasonal Permafrost and Phenology of Larix gmelinii in Erguna
摘要
Abstract
It is of great significance to study the relationship between the phenological periods of Larix gmelinii and characteristics of seasonal permafrost change to provide scientific guidance for the rational utilization of permafrost resources and the practice of local forestry production.Using statistical methods such as linear tendency estimation and Pearson correlation coefficient,this study focuses on the phenological periods of Larix gmelinii in Erguna and its relationship with the characteristics of seasonal permafrost change based on the permafrost data from Erguna Ground Meteorological Station and the phenological observation data from Erguna Agrometeorological Observation Station from 1991 to 2023.The results showed that:(1)seasonal permafrost in the study area had undergone significant changes,with the first day of freezing delayed by 5 days per 10 years on average,and the last day of melting advanced by 18 days per 10 years.It also indicated that the first day of thaw was relatively stable.The maximum permafrost depth decreased by 29 cm,the number of thaw days and the freeze-thaw cycle were shortened by16 days,and 23 days per 10 years on average,respectively.(2)During the study period,the spring and autumn phenological periods of Larix gmelinii showed a postponement trend,with the flower bud opening stage and the beginning of leaf development delaying by an average of 5 days every 10 years,and the complete leaf discoloration stage and the end defoliation stage delaying by 11 days on average every 10 years.The length of the growing season was extended by 6 days every 10 years on average,and the extension of the number of days from the initial period of leaf exhibition to the complete discoloration period at the middle of the growing season contributed the most.(3)The different phenological periods of Larix gmelinii were closely related to the seasonal permafrost.The postponement of different phenological periods and the extension of the growing season of Larix gmelinii were closely related to the postponement of the first day of permafrost freezing,the advance of the last day of thawing,the number of thawing days and the shortening of the freeze-thaw cycle,and the shallow depth of the maximum permafrost also had a certain impact on the postponement of the phenological period of Larix gmelinii.This study demonstrated the phenological periods of Larix gmelinii in Erguna and their relationship with seasonal permafrost changes,providing a reference for guiding scientific forestry production.关键词
季节性冻土/兴安落叶松/物候期/相关关系/额尔古纳Key words
seasonal permafrost/Larix gmelinii/phenological period/correlation/Erguna分类
天文与地球科学引用本文复制引用
杨丽萍,张胜利,张存厚,吕琰,唐家琦..额尔古纳兴安落叶松物候期与季节性冻土关系研究[J].中国农学通报,2025,41(35):80-87,8.基金项目
国家自然科学基金项目"典型草原不同退化类型雪水消融过程水分转换效率研究"(32360295) （32360295）
内蒙古自治区自然科学基金项目"气候和冻土对内蒙古大兴安岭林区植被的影响"(2023LHMS04004)、"内蒙古大青山油松人工林碳储量、固碳过程及速率研究"(2025LHMS03032) （2023LHMS04004）
内蒙古科技计划项目"内蒙古黄河流域西鄂尔多斯高原洪旱灾害遥感监测技术研发与应用"(2025YFHH0005)、"毛乌素沙地水资源新业态技术研究"(2022YFHH0100). （2025YFHH0005）
