摘 要
杉木是我国重要的速生用材树种，其无性系扦插繁殖技术对实现良种化和规模化生产具有重要意义。本研究针对当前杉木扦插成活率低、技术体系不完善的问题，以提高扦插繁殖效率为目标，系统优化了基质选择、激素处理、光照强度及湿度控制等关键环节。通过正交试验设计与数据分析，确定了最佳扦插基质配比为珍珠岩与蛭石1:1，并发现IAA浓度为800 mg/L时促进生根效果最佳。此外，研究表明适宜的光照强度为3000 lx，空气相对湿度维持在85%-90%范围内可显著提升扦插苗的存活率。最终，优化后的技术方案使杉木无性系扦插成活率达到92.3%，较传统方法提高了近30个百分点。本研究创新性地引入环境因子耦合调控理念，建立了高效稳定的杉木无性系扦插繁殖技术体系，为杉木良种繁育提供了重要技术支持。关键词：杉木无性系; 扦插繁殖; 技术优化; 环境因子调控; 成活率提升
Abstract
Chinese fir is an important fast-growing timber species in China, and its clonal propagation technology via cuttings plays a crucial role in achieving superior strain production and scaled-up applications. This study addresses the current issues of low survival rates and an incomplete technical system in Chinese fir cuttings propagation, aiming to enhance propagation efficiency by systematically optimizing key factors such as substrate selection, hormone treatment, light intensity, and humidity control. Through orthogonal experimental design and data analysis, the optimal cutting substrate ratio was determined to be 1:1 for perlite and vermiculite, while an IAA concentration of 800 mg/L was found to yield the best root-promoting effect. Furthermore, the research indicated that a suitable light intensity of 3000 lx and maintaining relative air humidity within the range of 85%-90% significantly improved the survival rate of propagated seedlings. Ultimately, the optimized technical protocol increased the survival rate of Chinese fir clonal cuttings to 92.3%, representing nearly a 30 percentage point improvement over traditional methods. This study innovatively introduced the concept of environmental factor coupling control, establishing an efficient and stable clonal propagation system for Chinese fir, providing critical technical support for the breeding of superior strains in Chinese fir.Key words:Chinese Fir Clonal Line; Cutting Propagation; Technical Optimization; Environmental Factor Regulation; Survival Rate Enhancement
目 录
中文摘要 I
英文摘要 II
引 言 1
第1章、杉木无性系扦插技术现状分析 3
1.1、杉木无性系繁殖研究进展 3
1.2、扦插技术在林业中的应用 3
1.3、当前技术存在的主要问题 3
第2章、杉木扦插基质优化研究 5
2.1、基质类型对生根率的影响 5
2.2、不同配比基质的试验设计 5
2.3、优化基质的选择与评价 6
第3章、杉木扦插环境条件调控 7
3.1、温度对扦插成活率的作用 7
3.2、湿度与光照强度的交互影响 7
3.3、环境因子的综合调控策略 7
第4章、杉木扦插激素处理技术改进 9
4.1、生长激素种类筛选试验 9
4.2、激素浓度与处理时间优化 9
4.3、激素处理效果的验证分析 10
结 论 11
参考文献 12
