欢迎访问《中国农学通报》,

中国农学通报 ›› 2022, Vol. 38 ›› Issue (3): 25-29.doi: 10.11924/j.issn.1000-6850.casb2021-0258

所属专题: 生物技术 园艺

• 林学·园艺·园林 • 上一篇    下一篇

切根对乌桕容器苗质量的影响

吴文()   

  1. 上海市林业总站,上海 200072
  • 收稿日期:2021-03-16 修回日期:2021-07-11 出版日期:2022-01-25 发布日期:2022-02-25
  • 作者简介:吴文,男,1974年出生,湖南涟源人,高级工程师,硕士研究生,研究方向:林木种苗培育与品种选育。通信地址:200072 上海市静安区沪太路1053弄7号 上海市林业总站,Tel:021-56063471,E-mail: 1203458287@qq.com
  • 基金资助:
    中央财政林业科技推广示范资金项目“彩叶、珍贵树种在生态公益林中的推广应用”(沪(2019)TG02号)

Effect of Root Pruning on Quality of Sapium sebiferum (L.) Roxb. Container Seedlings

WU Wen()   

  1. Shanghai Forestry Station, Shanghai 200072
  • Received:2021-03-16 Revised:2021-07-11 Online:2022-01-25 Published:2022-02-25

摘要:

乌桕[Sapium sebiferum (L.) Roxb.]是中国特有的彩叶树种,春秋季叶片颜色红艳夺目,具有极高的园林观赏价值。随着中国“森林四化”工作的推进,乌桕逐渐被林业工作者们重视。本研究对乌桕容器苗开展3种不同比例的切根试验,并对其形态及生理指标进行对比分析。结果表明:切根可显著促进苗高、地径、地上部分生物量、地下部分生物量及须根生物量的增加,但各切根处理间的差异并不显著。切根可明显优化乌桕容器苗的根系形态,其中1/3切根的各项指标最优,一级侧根数平均为4.56条,根系总长为484.26 cm,根系表面积为210.59 cm2,根系体积为7.62 cm3,直径小于0.5 mm根长为255.91 cm,直径大于4.5 mm根长为21.05 cm。幼苗切根后,幼苗根系营养物质含量和根系活力均发生了改变,其中1/3切根的根系中可溶性糖及淀粉含量最高,分别为53.34 mg/g、138.80 mg/g。根系活力则随着切根比例的增大而增大。

关键词: 乌桕, 容器育苗, 切根, 生物量, 根系活力, 可溶性糖及淀粉

Abstract:

Sapium sebiferum (L.) Roxb. is a unique color-leaf tree species in China. Its leaf has a bright red color in spring and autumn, and it has a high ornamental value. With China’s forestry development, Sapium sebiferum has been gradually valued. In this paper, three different ratios of root pruning were carried out on the container seedlings of Sapium sebiferum, and the morphological and physiological indexes were compared. The results show that root pruning could significantly promote the seedling height, ground diameter, above-ground biomass, underground biomass and fibrous root biomass, but there is no significant difference between the root pruning treatments. The root morphology of Sapium sebiferum container seedlings could be greatly improved by root pruning. The ideal method is to prune 1/3 of the main root, with an average number of first-order lateral roots of 4.56, a total length of 484.26 cm, a root surface area of 210.59 cm2 and a root volume of 7.62 cm3, the root length with a diameter less than 0.5 mm is 255.91 cm and the root length with a diameter more than 4.5 mm is 21.05 cm. The nutritional content and root activity of the seedlings’ roots change after root pruning. The content of soluble sugar and starch of the pruning of 1/3 main root are the highest, 53.34 mg/g and 138.80 mg/g respectively. The root vigor increases with the root pruning ratio.

Key words: Sapium sebiferum, container seedling, root pruning, biomass, root activity, soluble sugar and starch

中图分类号: