中国农学通报2025，Vol.41Issue(36)：60-66,7.
内蒙古兴安盟大田农作物分发育期叶面积指数研究
Study on Leaf Area Index of Field Crops in Xing'an League of Inner Mongolia During Different Development Stages
摘要
Abstract
To correct the errors caused by fixed leaf area correction coefficients in agricultural meteorological standards from the 1960s,a systematic study was conducted in 2024-2025 at a typical agricultural meteorological experimental site in Zhalant Banner,Inner Mongolia,focusing on 5 major crops:maize,rice,sorghum,soybean,and mung bean.The coordinate paper method was employed to measure the leaf area correction coefficients(K)and leaf area index(LAI)across different growth stages.The results revealed that:(1)K values of crop exhibited significant variations across growth stages,peaking during the maize flowering and silk emergence stage(0.856)and soybean branching stage(0.841).The average K values were maize(0.750),rice(0.739),mung bean(0.735),soybean(0.709),and sorghum(0.683),all higher than traditional empirical values;(2)LAI displayed a unimodal dynamic pattern,with peak values being concentrated in the reproductive growth stage(reaching up to 2.14 during rice heading and flowering),demonstrating distinct crop-specific characteristics;(3)the traditional fixed coefficients were generally underestimated,with a maximum deviation of 17.6%,introducing systematic errors in modern precision agriculture and remote sensing inversion.This study has constructed the first high-precision crop-specific K and LAI dataset for major crops in Xing'an League,providing localized key parameters for regional crop growth models,remote sensing validation,and smart meteorological services.It has advanced the update of agricultural meteorological observation standards toward a'dynamic,precise,crop-specific,and growth-stage-specific'framework,promoting the transition from traditional empirical services to data-driven,model-supported approaches,thereby laying a solid foundation for smart agriculture and climate adaptation management.关键词
农作物/发育期/坐标纸法/叶面积指数/研究Key words
crops/development stage/coordinate paper method/leaf area index/research分类
农业科技引用本文复制引用
杨玉辉,董静,项群壹,王建国,刘冠华,吴志峰..内蒙古兴安盟大田农作物分发育期叶面积指数研究[J].中国农学通报,2025,41(36):60-66,7.基金项目
内蒙古兴安盟气象局科研项目"兴安盟大田农作物分发育期叶面积指数研究项目"(xaqa2025-13). （xaqa2025-13）
