美丽箬竹容器育苗鞭段侧芽萌发生长的位置偏向性  

Lateral rhizome bud directional sprouting of Indocalamus decorus seedling raised in container.

作　　者：谷瑞 徐森 陈双林[1] 郭子武[1] 章超 GU Rui;XU Sen;CHEN Shuang-lin;GUO Zi-wu;ZHANG Chao(Research Institute of Subtropical Forestry,Chinese Academy of Forestry,Hangzhou 311400,China)

机构地区：[1]中国林业科学研究院亚热带林业研究所,杭州311400

出　　处：《生态学杂志》2020年第9期2896-2903,共8页Chinese Journal of Ecology

基　　金：“十三五”国家重点研发计划专项(2016YFD0600901)资助。

摘　　要：地被竹广泛应用于园林绿化,鞭段容器育苗是地被竹生产可全年造林、一次成景竹苗的重要手段,鞭段侧芽萌发生长状况与竹苗质量密切相关。以美丽箬竹(Indocalamus decorus)一年生鞭段为试材,选取细鞭(鞭径2.90±0.32 mm)、粗鞭(鞭径5.42±0.63 mm)2种径级的竹鞭开展3种鞭长(3、6、9 cm)6种处理的鞭段侧芽萌发试验,调查各处理下不同鞭段部位的侧芽萌发生长情况。结果表明:美丽箬竹容器育苗的每个鞭段总体上至少有一个侧芽萌发生长为新竹苗,侧芽萌发生长具有明显的向顶或向基的位置偏向性,即鞭段两端(远端、近端)侧芽萌发生长比例显著高于鞭段中端,而远端、近端间差异不明显;鞭长对鞭段两端侧芽萌发生长比例有明显的正效应,而鞭径效应不明显。鞭长和鞭径对整个鞭段侧芽萌发生长的新竹数量、地径和高度有明显的正效应,对不同鞭段部位的新竹数量也有显著影响,但对不同鞭段部位的新竹地径和高度没有明显影响。相同鞭长和鞭径条件下,鞭段部位对新竹生长特征没有影响。针对鞭段侧芽萌发生长的位置偏向性,建议地被竹鞭段育苗时根据容器大小采取适当的短鞭多段的埋鞭方法,以提高一年出圃容器竹苗的新竹分布均匀度和景观质量。Dwarf bamboo is widely used in landscaping.Propagation in container by its rhizome is one way for dwarf bamboo production in supply for year-around afforestation and fast landscaping.Seedling quality is closely associated with its lateral rhizome bud status.Here,we examined the effects of bud position,length,and thickness of rhizome on lateral bud sprouting of Indocalamus decorus.One-year-old rhizome segments with two diameter grades[smaller rhizome(D1,2.90±0.32 mm)and bigger rhizome(D2,5.42±0.63 mm)]and three length rhizomes(L1,3 cm;L2,6 cm;L3,9 cm)were examined.The results showed that at least one rhizome lateral bud sprouted and grew into a young bamboo.More lateral buds sprouted apically or basally.Lateral buds sprouted much more at both segment ends than in its middle part.Lateral bud sprout-out was promoted by rhizome length at both rhizome segment ends,but not by rhizome segment diameter.The rhizome segment length and diameter had significant positive effects on number,ground diameter and height of young bamboos that grew on the whole rhizome segment.They also had significant effects on number of young bamboos located in different rhizome segment positions,but did not affect its ground diameter and height.The position of rhizome segment did not affect young bamboo growth for the same classes of rhizome length and diameter.Considering the dependence of lateral rhizome bud sprouting on the position in rhizome segments,short and multisegment rhizomes were recommended for rhizome-burring propagation in one-year-old dwarf bamboo production.

关 键 词：美丽箬竹 容器苗 鞭段 侧芽萌发偏向 

分 类 号：S687[农业科学—观赏园艺]