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橡胶树的营养生长是橡胶树种植和经济管理的重要基础。 橡胶幼苗的茎直径和高度生长方式以及季节变化仍知之甚少。 研究橡胶树的年生长规律和季节变化将有助于了解橡胶树的生物学特性,为田间栽培和管理提供参考。 田间播种的橡胶树苗和袋装的高矮苗和茎径均表现出明显的“慢-快-慢”的年格局。 身高生长和茎直径生长响应最好拟合逻辑方程,支持观察到的模式。 袋装橡胶苗和田间播种橡胶苗的株高快速增长分别发生在6月至11月和5月至11月。 这个时期,袋装橡胶苗和田间播种的橡胶苗的株高增长最高,分别占总生长的83.99%和86.65%。 袋装橡胶苗和田间播种橡胶苗的茎径快速增长分别发生在6月至11月和5月至11月。 在此期间,袋装橡胶苗和田间播种橡胶苗的茎生长量最大,分别占总生长量的86.71%和84.60%。 全年进行袋装育秧和田间播种的橡胶育苗有9个推广单元,5月至11月每个月都有1个推广单元。 全年的推广单位没有停产期,株高增长率有季节性差异。 但是,田间播种的橡胶苗的叶期早于袋装橡胶苗的栽培的叶期,田间播种的橡胶苗栽培的每个延伸单位都大于袋装橡胶苗的栽培。 在不同栽培条件下,降水对幼苗生长的影响最大。
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Open Journal of Forestry, 2019, 9, 397-406
https://www.scirp.org/journal/ojf
ISSN Online: 2163-0437
ISSN Print: 2163-0429
DOI:
10.4236/ojf.2019.94022 Oct. 28, 2019 397 Open Journal of Forestry
Seasonal Changes Impact on Growth of Rubber
(Hevea brasiliensis) Seedlings under Different
Cultivation
Dongling Qi
1,2,3
, Guishui Xie
1,2,3
, Zhixiang Wu
1,2,3*
1
Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
2
Danzhou Investigation & Experiment Station of Tropical Crops, Ministry of Agriculture and Rural Affairs, Danzhou, China
3
Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture and Rural Affairs, Haikou, China
Abstract
The vegetative growth of
rubber tree
is an important basis for rubber tree cul-
tivation and economic management. Stem diameter and height growth pat-
terns of rubber seedlings and the seasonal variability are still poorly unders-
tood. Studying the annual growth patterns and seasonal v
ariation of rubber
seedling will help understanding biological characteristics of rubber tree and
provide a reference for field cultivation and management. Height growth and
stem diameter of field-sown rubber seedlings cultivation and polybag-
raised
cultivation all displayed a distinct annual pattern of “slow-fast-
slow”. Height
growth and stem diameter growth response fitted the logistic equation pre-
ferably, supporting the observed pattern. Fast-growth of plant height for po-
lybag-raised rubber seedlings cultivation and field-sown rubber seedlings cul-
tivation occurred from June to November and May to November, respective-
ly. This period saw the greatest accumulations of plant height growth for po-
lybag-raised rubber seedlings cultivation and field-sown rubber seedlings cul-
tivation accounting for 83.99% and 86.6
5% of total growth, respectively.
Fast-growth of stem diameter for polybag-
raised rubber seedlings cultivation
and field-
sown rubber seedlings cultivation occurred from June to November
and May to November, respectively. This period saw the greatest accumula-
tions of stem growth for polybag-
raised rubber seedlings cultivation and
field-sown rubber seedlings cultivation accounting for 86.71% and 84.60% of
total growth, respectively. Polybag-raised rubber s
eedlings cultivation and
field-
sown rubber seedlings cultivation for the whole year had nine extension
units and each month had one extension unit from May to November. Exten-
sion unit of for the whole year did not stop period and plant height growth
rate has the seasonal difference. However, leaf phenophase of field-sown rubber
How to cite this paper:
Qi, D. L., Xie, G
.
S
., & Wu, Z. X. (2019).
Seasonal Changes
Impact on Growth of Rubber (
Hevea bras
i-
liensis
) Seedlings under Different Cultiva-
tion
.
Open Journal of Forestry, 9,
397-406.
https:
//doi.org/10.4236/ojf.2019.94022
Received:
September 22, 2019
Accepted:
October 25, 2019
Published:
October 28, 2019
Copyright © 201
9 by author(s) and
Scientific
Research Publishing Inc.
This work is licensed under the Creative
Commons Attribution International
License (CC BY
4.0).
http://creativecommons.org/licenses/by/4.0/
Open Access
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