林业科学研究2025，Vol.38Issue(6)：59-67,9.DOI:10.12403/j.1001-1498.20250031
截顶矮化对勃氏甜龙竹的生长特性及笋品质的影响研究
Effects of Topping-Induced Dwarfing on Growth Characteristics and Bamboo Shoot Quality of Dendrocalamus brandisii
摘要
Abstract
[Objective]To identify effective topping-induced dwarfing for Dendrocalamus brandisii and provide a theoretical basis for efficient,controlled-environment conditions.[Method]Using introduced Dendrocalamus brandisii plants from Zhangzhou,Fujian Province experiments were conducted with differ-ent breast diameters(25 mm,30 mm,35 mm)and top-cutting heights(200 cm,240 cm,280 cm).The ef-fects of these factors on growth were evaluated by measuring and analyzing individual growth indicators,chlorophyll,photosynthetic parameters,and leaf nutrients.[Result](1)Top-ping significantly reduced the height of the lower branches.As the cuntting intensity increased,the angle of the lowest branches widened,while the number of branches and leaf area index showed no significant change.(2)After top-cutting,chlorophyll content was higher in lower leaves than in upper leaves,whereas the maximum net photosynthetic rate was significantly lower in lower leaves.The H2D2 treatment exhibited the most pro-nounced effect.(3)Following top-cutting,the C,N,and P contents in upper canopy leaves were higher than those in the lower canopy,while the C/N,C/P,and N/P ratios were lower.Among the treatments,H2 resulted in the highest nutrient content.(4)In terms of nutrient content,roughness,and taste of bamboo shoots,H1 treatment resulted in the highest quality of bamboo shoots.[Conclusion]Topping triggers com-pensatory growth in Dendrocalamus brandisii.In summer,when greenhouse temperatures are high,high topping(H3)suppresses photosynthesis,whereas H2 enhances nutrient accumulation.H1 prioritizes shoot quality under limited nutrition,but reduces yield.Therefore,H2 is the optimal and most economical choice-when fertilizer input and temperature are managed to secure shoot quality.关键词
勃氏甜龙竹/设施栽培/截顶/叶绿素/光合参数/叶片养分/笋品质Key words
Dendrocalamus brandisii/facility cultivation/top cutting/chlorophyll/photosynthetic parameters/leaf nutrients/bamboo shoot quality分类
农业科技引用本文复制引用
刘昊林,张玮,华克达,王保玺,刘晓草,陈胜,张磊,张东升,谢锦忠..截顶矮化对勃氏甜龙竹的生长特性及笋品质的影响研究[J].林业科学研究,2025,38(6):59-67,9.基金项目
浙江省林业科技项目(浙江省-中国林科院合作重点项目)(2023SY01) （浙江省-中国林科院合作重点项目）
湖州市科技特派员(农业)项目(2023KT41) （农业）
