定干高度与时间对直干桉嫩枝数量和质量的影响  

Effects of cutting height and time on the quantity and quality of Eucalyptus maideni shoots

作　　者：唐有慈 李妹 张兴才 曹子林[2] 王晓丽 TANG Youci;LI Mei;ZHANG Xingcai;CAO Zilin;WANG Xiaoli(College of Forestry,Southwest Forestry University,Kunming 650224,Yunnan,China;College of Ecology and Environment,Southwest Forestry University,Kunming 650224,Yunnan,China)

机构地区：[1]西南林业大学林学院,云南昆明650224 [2]西南林业大学生态与环境学院,云南昆明650224

出　　处：《中南林业科技大学学报》2024年第7期47-53,共7页Journal of Central South University of Forestry & Technology

基　　金：国家重点研发计划课题项目(2016YFD0600501);云南省种子种业联合实验室项目(202205AR070001-18)。

摘　　要：【目的】为构建直干桉促萌技术体系提供理论依据,研究定干高度和定干时间对直干桉苗木萌蘖嫩枝的影响。【方法】以1年直干桉实生苗为试材,采用2因素(定干高度:5、10、15、20 cm;定干时间:9、10、11月)全面试验设计进行定干高度与定干时间对直干桉萌蘖嫩枝数量、有效嫩枝数量、有效嫩枝长度和有效嫩枝基径效应影响的研究,分析最佳定干高度和定干时间。【结果】定干处理后60与120 d,萌蘖产生的嫩枝数量(4.68,3.72,0.30枝·株^(-1)),有效嫩枝数(3.25,3.38枝·株^(-1)),有效嫩枝长度(8.639,9.878 cm),有效嫩枝基径(0.748,1.217 mm)效果最好的均为处理组合A_(4)B_(1)(定干高度20 cm,定干时间9月)。60 d与120 d 12个处理组合间的嫩枝数、有效嫩枝数、有效嫩枝长度、有效嫩枝基径均具有极显著差异,总体上处理组合A_(4)B_(1)显著大于其余处理组合;因素水平间均存在极显著差异,A因素均是影响苗木的主要因子,总体上A_(4)极显著大于其他3个水平,B_(1)极显著大于其他2个水平,理论优水平组合为A_(4)B_(1)。【结论】综上,定干高度与定干时间对直干桉苗木萌蘖能力影响极其显著,利于直干桉苗木促萌的最优处理组合为A_(4)B_(1)(定干高度20 cm,定干时间9月),定干高度是影响苗木萌蘖的主要因子,在实际生产中可根据试验结果采取最适定干高度与定干时间。【Objective】To provide theoretical basis for constructing a technology system for promoting the sprouting of Eucalyptus maideni,and to study the effects of cutting height and time on the sprouting and shoots of E.maideni seedlings.【Method】Using 1 a E.maideni seedlings as test materials,using 2 factors (cutting height:5,10,15,20 cm;cutting time:September,October,November) was designed to study the effects of cutting height and time on the number of shoots,effective shoots quantity,effective shoots length,and effective shoots diameter of E.maideni.to analyze the cutting height and cutting time.【Result】At 60 days and 120 days after the cutting treatment,the best number of shoots produced by sprouting (4.68,3.72,0.30 branches·plant^(-1)),effective number of shoots (3.25,3.38 branches·plant^(-1)),effective length of shoots (8.639,9.878 cm),and effective base diameter of shoots (0.748,1.217 mm) were all the treatment combination A_(4)B_(1) (cutting height of 20 cm,cutting time of September).There were extremely significant differences in the number of shoots,effective shoots,effective shoots length,and effective shoots diameter between the 12 treatment combinations at 60 days and 120 days.Overall,the treatment combination A_(4)B_(1) was significantly larger than the other treatment combinations;There were significant differences between factor levels,and factor A was the main factor affecting seedlings.Overall,A_(4) was significantly higher than the other three levels,and B_(1) was significantly higher than the other two levels.The theoretical optimal level combination was A_(4)B_(1).【Conclusion】In summary,the effects of cutting height and cutting time on the sprouting ability of E.maideni seedlings are extremely significant.The optimal treatment combination for promoting sprouting of E.maideni seedlings is A_(4)B_(1) (cutting height of 20cm,cutting time of September).Cutting height is the main factor affecting seedling sprouting.In practical production,the most suitable cutting height and cutting time

关 键 词：直干桉 定干高度 定干时间 嫩枝数量 嫩枝质量 

分 类 号：S792.39[农业科学—林木遗传育种]