森林与环境学报2024，Vol.44Issue(3)：308-316,9.DOI:10.13324/j.cnki.jfcf.2024.03.011
六盘山华北落叶松人工林叶面积指数的校准
Calibration of leaf area index of Larix principis-rupprechtii artificial pure forest in Liupanshan
摘要
Abstract
We conducted this study in the northern part of Liupanshan in Ningxia,China,to improve the plant canopy analyzer accuracy and applicability in measuring the forest leaf area index(LAI).We selected different stand characteristics of North China larch plantations and applied the litter collection method to measure the true LAI of North China larch plantations to determine the plant canopy analyzer error range and calibrate it.Our results indicated the following:(1)the LAI of the artificial pure forest of North China larch in the Liupanshan area was 0-2.96,exhibiting a decreasing trend from August to October;(2)the LAI values measured by the plant canopy analyzer during the mid-growing season(July to September)were relatively small,with an error range of 0.03-0.38(1.41%-15.89%),while the values measured at the end of the growth season(October)were relatively large,with an error range of 0.04-0.86(1.67%-90.87%);and(3)the plant canopy analyzer-generated error measurements were closely related to forest canopy closure,forest density,tree height,diameter at breast height,and other factors.By constructing a multifactor coupling model between forest stand characteristics and LAI,the measurement accuracy and applicability range of the plant canopy analyzer can be improved.关键词
植物冠层分析仪/叶面积指数/凋落物收集法/华北落叶松Key words
plant canopy analyzer/leaf area index/litter collection method/Larix principis-rupprechtii分类
农业科技引用本文复制引用
吴月娇,胡振华..六盘山华北落叶松人工林叶面积指数的校准[J].森林与环境学报,2024,44(3):308-316,9.基金项目
"十四五"国家重点研发计划课题"土石山区华北落叶松林水源涵养及固碳功能提升技术"(2022YFF1300404). （2022YFF1300404）
