摘要
为研究整形修剪对红松母树林结实的影响,于2019—2020年对红松母树林母树,从整形修剪时间、修剪部位、不同主枝数3个方面进行试验。结果显示:整形修剪在树液流动前的1个月内(2—3月)为修剪最佳适宜期,以3~4轮枝层和4~5轮枝层为最佳截顶部位,在增产的基础上为采种提供方便。去顶后,保留3个主枝的处理种子增产40.58%~68.01%;保留5个主枝的处理种子增产56.38%~101.62%。截顶修剪促进了雌、雄花的形成。保留3个主枝的雌花数较对照提高51.52%,雄花数较对照提高237.58%;保留5个主枝的雌花数较对照提高104.22%,雄花数较对照提高422.22%。一次回缩,对树体矮化有一定的作用,多次回缩会减弱主枝的树势;对结实不利。
In order to study the effect of plastic pruning on the fruiting of Pinus koraiensis seed stands,experiments were conducted from 2019 to 2020 on the trees of Pinus koraiensis seed stands from three aspects:plastic pruning time,pruning location,and retention of different numbers of main branches.The results showed that pruning within one month before sap flow(in February and March)is the best suitable period for pruning.Considering that the purpose of pruning is to promote the fruiting and dwarfing of the seed stands,and to provide convenience for seed collection on the basis of increasing yield,the optimal pruning locations are 3~4 and 4~5 branch layers.After removing the top,the treated seeds yield with three main branches retained increased yield by 40.58%~68.01%;The treatment of retaining 5 main branches increased seed yield by 56.38%~101.62%.Pruning promotes the formation of female and male flowers.The number of female flowers with three main branches retained increased by 51.51% compared to the control,while the number of male flowers increased by 237.58%;The number of female flowers with 5 main branches retained increased by 104.22% compared to the control,and the number of male flowers increased by 422.22% compared to the control.Tree body retraction once has a certain effect on tree dwarfing.Multiple retractions can weaken the vigor of the main branch,which is not good for fruiting.
作者
马茂
周鑫悦
党磊
范海江
袁德水
MA Mao;ZHOU Xinyue;DANG Lei;FAN Haijiang;YUAN Deshui(Wangyedian Experimental Forestry Farm of KarqinQi,Chifeng,Nei Monggol 024419,China;Hebei Academy of Forestry and Grassland Science/Hebei Technical Innovation Center of Improved Tree Species,Shijiazhuang,Hebei 050061,China;Honghua'erji Forestry Bureau of Hulunbeier City,Hulunbeier,Nei Monggol 021112,China;Hebei Mulan Weichang State Forest,Weichang,Hebei 068450,China)
出处
《河北林业科技》
2025年第2期46-50,共5页
Journal of Hebei Forestry Science and Technology
关键词
红松
整形修剪
开花结实
球果数量
种子产量
Pinus koraiensis
pruning
flowering and seed setting
number of cones
seeds yield
