摘要
为了揭示不同种植密度对芳樟形态指标及生物量积累动态特征的影响,设置4个不同种植密度:20 000株/hm^(2)(T1)、10 000株/hm^(2)(T2)、6 666株/hm^(2)(T3)、5 000株/hm^(2)(T4),对不同处理下芳樟植株生长发育指标动态变化特征进行分析.结果表明:随着密度的降低,各处理芳樟的株高、叶面积指数不断减小,而基径和冠幅呈增大趋势.芳樟单株生物量随密度降低而增加,而单位面积生物量随着密度的减小呈降低趋势.随着生长进程的推进,芳樟叶生物量分配比例总体下降,其中T1降幅最大.密度显著影响枝叶分配比例,各处理叶生物量比例随密度的降低呈先升后降趋势,但在10月和12月随密度减小而持续增加.种植密度显著影响芳樟生长动态,幼林期高密度(T1)通过群体优势实现最大单位面积生物量积累.
To investigate the influence of different planting densities on the morphological traits and biomass accumulation dynamics of Cinnamomum camphora,four density treatments were established:20,000 plants/ha(T1),10,000 plants/ha(T2),6,666 plants/ha(T3),and 5,000 plants/ha(T4).The dynamic changes in growth and development parameters of Cinnamomum camphora under these treatments were analyzed.The results indicate that as planting density decreases,plant height and leaf area index(LAI)of Cinnamomum camphora gradually decline,whereas basal diameter and crown width show an increasing trend.Individual plant biomass increases with reduced density,while biomass per unit area exhibite a decreasing trend.Over the growth period,the proportion of leaf biomass allocation generally decreases,with T1 showing the most significant reduction.Planting density significantly influenced the shoot-to-leaf biomass ratio.Across treatments,the proportion of leaf biomass initially increased and then decreases with lower density,except in October and December,when it consistently increases as density declined.Planting density has a notable impact on the growth dynamics of Cinnamomum camphora.During the early growth stage,high-density planting(T1)achieves the highest biomass accumulation per unit area due to population advantages.
作者
万盛英
马杰
赵姣
姜宇鑫
刘青青
张杰
张海燕
WAN Shengying;MA Jie;ZHAO Jiao;JIANG Yuxin;LIU Qingqing;ZHANG Jie;ZHANG Haiyan(School of Soil and Water Conservation,Jiangxi University of Water Resources and Electic Power,Nanchang,Jiangxi 330099,China;Jiangxi Provincial Engineering Research Center of Seed-breeding and Utilization of Camphor Trees,Nanchang,Jiangxi 330099,China)
出处
《宜宾学院学报》
2025年第12期73-79,共7页
Journal of Yibin University
基金
国家自然科学基金项目(32060333)
江西省科技厅重点研发计划项目(20181ACF60002)
江西省重大科技研发专项项目(20203ABC28W016)
江西省教育厅科学技术研究项目(GJJ2201515)。
关键词
芳樟
种植密度
冠层结构
生物量分配
动态变化
Cinnamomum camphora
planting density
canopy structure
biomass distribution
dynamic change
