控根对湿加松扦插苗生长与根系形态的动态影响

doi:10.13466/j.cnki.lyzygl.2019.03.020

林业资源管理 ›› 2019›› Issue (3): 118-123.doi: 10.13466/j.cnki.lyzygl.2019.03.020

控根对湿加松扦插苗生长与根系形态的动态影响

林昌明¹(), 彭冠明¹, 黄增悦¹, 黄婷¹, 司徒荣贵¹, 李振², 郭文冰²(), 赵奋成²

1.台山市红岭种子园,广东江门 529223
2.广东省林业科学研究院广东省森林培育与保护利用重点实验室,广州 510520

收稿日期:2019-03-26 修回日期:2019-04-25 出版日期:2019-06-28 发布日期:2020-09-25
通讯作者: 郭文冰
作者简介:林昌明(1968-),男,广东人,高工,学士,主要从事松树种苗繁育的研究工作。Email:tsshlzzy@126.com
基金资助:
国家重点研发计划课题“湿地松等国外松脂材兼用林高效培育技术研究”(2017YFD0600502)

Dynamic Effects of Root Pruning on Growth and Root Morphology in P.elliottii×P.caribaea Cuttings

LIN Changming¹(), PENG Guanming¹, HUANG Zengyue¹, HUANG Ting¹, SITU Wendou¹, LI Zhen², GUO Wenbing²(), ZHAO Fencheng²

1. Taishan Hongling Seed Orchard,Guangdong Jiangmen 529223
2. Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization,Guangdong Academy of Forestry,Guangzhou 510520,China

Received:2019-03-26 Revised:2019-04-25 Online:2019-06-28 Published:2020-09-25
Contact: GUO Wenbing

摘要/Abstract

摘要：

以湿加松扦插容器苗为材料,设置空气切根(30,50,70 cm苗床)和不切根对照处理,分析处理后半年内株高、地径、地上部生物量、根系生物量、根长、根表面积、根直径、细根比例等指标的月变化。结果表明,控根影响了扦插苗的根系形态,但对扦插苗的生长与生物量无显著影响。处理4个月后,70 cm苗床的切根处理显著促进了根系的伸长生长,但5个月时,切根苗木的根系转向粗生长的阶段,与对照相比,细根比例降低,而根直径增大。苗木生长量呈现与根直径的相关性逐渐增强、而与根长度相关性减弱的趋势,表明控根苗木根系形态的动态变化有利于促进苗木的生长。建议采用70 cm苗床做湿加松扦插苗的空气切根。

关键词: 湿加松, 空气切根, 地径, 容器苗, 不定根

Abstract:

The container grown cuttings of P.elliottii×P.caribaea were cultured with air root pruning(RP) or without(control).The height of the raised bed were 30 cm,50 cm and 70 cm for the RP cuttings,respectively.The parameters including height,ground diameter,shoot biomass,root biomass,root length,root surface area,root diameter and fine root ratio,were monitored monthly within half a year.Although the root morphology was affected,no significant effects were found on cutting growth and biomass by root pruning.The root length was significantly increased in the RP cuttings at 70 cm-height bed 4 months after treatment.However,the root system of the RP cuttings changed from elongation to diameter growth.The fine root ratio decreased,and the root diameter increased compared to the control.The correlation between the growth and root diameter increased gradually,whereas the correlation between the growth and root length tended to decrease.It was implied that the changes in root morphology in RP cuttings would benefit the cutting growth.It is recommendes to use 70 cm-height bed for air root pruning for P.elliottii×P.caribaea cuttings.

Key words: P.elliottii×P.caribaea, air root pruning, ground diameter, container grown cuttings, adventitious roots

中图分类号:

S723.1

林昌明, 彭冠明, 黄增悦, 黄婷, 司徒荣贵, 李振, 郭文冰, 赵奋成. 控根对湿加松扦插苗生长与根系形态的动态影响[J]. 林业资源管理, 2019,(3): 118-123.

LIN Changming, PENG Guanming, HUANG Zengyue, HUANG Ting, SITU Wendou, LI Zhen, GUO Wenbing, ZHAO Fencheng. Dynamic Effects of Root Pruning on Growth and Root Morphology in P.elliottii×P.caribaea Cuttings[J]. FOREST RESOURCES WANAGEMENT, 2019,(3): 118-123.

图/表 6

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参考文献 16

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指标	1M	2M	3M	4M	5M	6M
地径(D)	0.944	0.556	0.764	0.398	0.177	0.303
株高(H)	0.445	0.870	0.441	0.616	0.488	0.794
地上部鲜重(SFW)	0.354	0.381	0.586	0.342	0.280	0.987
根鲜重(RFW)	0.874	0.949	0.203	0.137	0.913	0.444
地上部干重(SDW)	0.289	0.432	0.735	0.427	0.226	0.944
根干重(RDW)	0.717	0.432	0.241	0.075	0.200	0.793

指标	1M	2M	3M	4M	5M	6M
根冠比(R/S)	0.999	0.365	0.052	0.061	0.636	0.481
总根长(RL)	0.826	0.996	0.917	0.026	0.212	0.140
根表面积(RSA)	0.819	0.920	0.637	0.110	0.793	0.106
根平均直径(RD)	0.856	0.323	0.772	0.729	0.029	0.152
细根长(FRL)	0.803	0.979	0.979	0.008	0.095	0.235
细根比例(FRR)	0.879	0.124	0.255	0.370	0.046	0.197

	地径	株高	根鲜重	地上部鲜重	地上部干重	根干重	根冠比	总根长	根表面积	根直径	细根长
株高	0.525^*
根鲜重	0.571^*	0.456^*
地上部鲜重	0.696^*	0.636^*	0.587^*
地上部干重	0.703^*	0.629^*	0.560^*	0.956^*
根干重	0.578^*	0.432^*	0.920^*	0.599^*	0.598^*
根冠比	0.208^*	0.049	0.673^*	0.031	-0.010	0.735^*
总根长	0.382^*	0.269^*	0.718^*	0.351^*	0.334^*	0.588^*	0.499^*
根表面积	0.508^*	0.373^*	0.899^*	0.475^*	0.447^*	0.797^*	0.639^*	0.926^*
根直径	0.454^*	0.339^*	0.621^*	0.403^*	0.377^*	0.660^*	0.476^*	0.038	0.388^*
细根长	0.289^*	0.208^*	0.595^*	0.269^*	0.258^*	0.460^*	0.407^*	0.977^*	0.834^*	-0.140^*
细根比例	-0.354^*	-0.203^*	-0.362^*	-0.267^*	-0.253^*	-0.415^*	-0.305^*	0.112^*	-0.190^*	-0.858^*	0.300^*

批次	地径与根系形态				株高与根系形态
批次	根表面积	根直径	总根长	细根比例	根表面积	根直径	总根长	细根比例
1M	0.519^*	0.135	0.475^*	0.007	0.335^*	0.116	0.304^*	0.042
2M	0.364^*	0.247^*	0.288^*	-0.202^*	0.202^*	0.264^*	0.137	-0.187^*
3M	0.492^*	0.300^*	0.384^*	-0.065	0.208^*	0.325^*	0.090	-0.171
4M	0.538^*	0.313^*	0.430^*	-0.189^*	0.391^*	0.256^*	0.304^*	-0.116
5M	0.348^*	0.419^*	0.195^*	-0.308^*	0.212^*	0.276^*	0.109	-0.228^*
6M	0.448^*	0.444^*	0.261^*	-0.317^*	0.372^*	0.423^*	0.173	-0.308^*

控根对湿加松扦插苗生长与根系形态的动态影响

Dynamic Effects of Root Pruning on Growth and Root Morphology in P.elliottii×P.caribaea Cuttings

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