气象与环境学报2024，Vol.40Issue(6)：62-69,8.DOI:10.3969/j.issn.1673-503X.2024.06.008
辽西地区玉米农田土壤水分消退特征及其预测模型研究
Research on characteristics of soil moisture recession and the development of predictive models for corn fields in western Liaoning province
摘要
Abstract
Three types of soil textures(loam,sandy loam,and clay)from corn fields in western Liaoning province in 2021 were selected,along with different precipitation levels(light rain,moderate rain,and heavy rain)for con-tinuous 7 days and every other day for 7 days after that.The relative soil moisture data for 0～50 cm depth was collected.The characteristics of soil moisture recession for different precipitation levels,soil textures,and soil depth recession coefficients(K)during the corn growing season in this region were analyzed,and a soil moisture predic-tion model was constructed.The results show that the soil moisture recession process in corn fields of western Lia-oning can be divided into three stages:rapid recession,slow recession,and stagnant recession.The average reces-sion rate during the rapid recession stage for the three soil textures was 7.21 mm·d-1,with clay soil having a 9%-12%higher rapid recession rate than other soil textures.There were no significant differences in the slow recession and stagnant recession rates among different soil textures.The K value of the shallow layer(10～20 cm)was sig-nificantly smaller than other soil layers and had the largest dispersion.The fluctuation range of K values in the 50 cm soil layer increased significantly under heavy rainfall conditions.There was a significant negative correlation between K values and precipitation(R=-0.92).Under the same rainfall level,the K value of clay soil was12%-20%lower than that of loam and sandy loam.The monthly variation of K values showed the highest in March,lowest in late August,and rebounded to a relatively high value in late November.Based on the soil moisture bal-ance equation,a soil moisture recession model was constructed.The simulation accuracy was best for light rain lev-els,and the simulation results for shallow soil layers were better than those for deep layers.关键词
降水量级/土壤质地/消退速率/土壤水分平衡方程Key words
Precipitation levels/Soil texture/Recession rate/Soil moisture balance equation分类
天文与地球科学引用本文复制引用
张兵兵,吕晓,高莉莉,高全,吴航,梁涛,鲁宇超,张方敏,蔡福..辽西地区玉米农田土壤水分消退特征及其预测模型研究[J].气象与环境学报,2024,40(6):62-69,8.基金项目
国家自然科学基金项目(41775110、41975149)、辽宁省兴辽英才计划项目(XLYC1807262)和中国气象局沈阳大气环境研究所联合开放基金(2021SYIAEKFZD05、2021SYIAEKFMS37)共同资助. （41775110、41975149）
