带状采伐对毛竹地上生物量分配及异速生长的影响

doi:10.12302/j.issn.1000-2006.202012006

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南京林业大学学报（自然科学版） ›› 2021, Vol. 45 ›› Issue (5): 19-24.doi: 10.12302/j.issn.1000-2006.202012006

所属专题：专题报道

带状采伐对毛竹地上生物量分配及异速生长的影响

王树梅(), 范少辉, 肖箫, 郑亚雄, 周阳, 官凤英^*()

国家林业和草原局/北京市共建竹藤科学与技术重点实验室,北京 100102

收稿日期:2020-12-03 接受日期:2021-02-28 出版日期:2021-09-30 发布日期:2021-09-30
通讯作者: 官凤英
基金资助:
林业公益性科研院所基本科研业务费专项资金项目(1632020007);国家重点研发计划(2018YFD0600103);江苏宜兴竹林生态系统国家定位观测研究站运行补助

Effects of strip cutting on aboveground biomass accumulation and allocation, and allometric growth of Phyllostachys edulis

WANG Shumei(), FAN Shaohui, XIAO Xiao, ZHENG Yaxiong, ZHOU Yang, GUAN Fengying^*()

Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo & Rattan Science and Technology, Beijing 100102,China

Received:2020-12-03 Accepted:2021-02-28 Online:2021-09-30 Published:2021-09-30
Contact: GUAN Fengying

摘要/Abstract

摘要：

【目的】 毛竹林带状采伐可实现竹林机械化经营,研究不同采伐宽度毛竹立竹生物量分配及其异速生长,为毛竹林带状采伐经营提供科学依据。【方法】 2019年12月模拟机械采伐对不同宽度条带内的毛竹林实施全林皆伐,2020年8月统计试验毛竹林不同采伐宽度带(0、3、9、15 m)内新竹数量、胸径、枝下高和竹高。调查新竹枝、叶、秆生物量,分析伐后新竹地上构件生物量分配特征及其异速生长关系。【结果】 随着带状采伐宽度的增加,新竹数量先增加后减少,9 m采伐宽度带新竹数量最多,新竹竹高降低,胸径减小,枝下高及相对枝下高降低,立竹鲜枝质量、鲜叶质量、鲜秆质量及总生物量均显著降低。带状采伐可以提高立竹出叶强度、相对竹高,尤其增加叶分配占比和叶相对生物量。带状采伐未改变立竹秆-总生物量的等速生长关系,但对枝-总生物量、叶-总生物量相对生长速率产生显著影响,由异速生长关系转变为等速生长关系。【结论】 带状采伐致使毛竹通过生理整合作用权衡各构件资源分配关系,改变其异速生长关系,诱发新竹形态可塑性变化,9 m采伐宽度的新竹数量达到最大值。

关键词: 毛竹, 带状采伐, 生物量分配, 异速生长

Abstract:

【Objective】 Strip cutting of moso bamboo forests can realize their mechanized management. We aimed to provide a scientific basis for the reasonable management of bamboo strip cutting, biomass allocation and allometric growth of Phyllostachys edulis with different cutting widths. 【Method】 Whole forest clear-cutting of P. edulis forests of different widths was conducted in December 2019. The number of new bamboos, diameter at breast height (DBH), clear bole height and height of the bamboo at different cutting widths (0, 3, 9 and 15 m) were counted in August 2020. The biomass of branches, leaves and stems of new bamboo were investigated, and the biomass allocation characteristics and allometric growth relationship of aboveground components were analyzed. 【Result】 Strip cutting increased the number of new bamboos: the trend was first increase and then decrease, and the number reached the maximum value in the 9 m cutting width. With the increase in cutting width, the bamboo height (CBH), DBH, clear bole height, and ratio of CBH to DBH of new bamboo decreased, and the fresh branch, leaf, stem weight and total biomass decreased significantly. Strip cutting could improve the leaf strength and ratio of bamboo height to DBH of P. edulis, especially the proportion of leaf distribution and leaf relative biomass. Strip cutting did not change the isokinetic growth relationship between the stem-total biomass of P. edulis but significantly affected the relative growth rate of branch-total biomass and leaf-total biomass, which changed from allometric growth to isokinetic growth.【Conclusion】 The results showed that strip cutting balanced resource allocation among the components through physiological integration, the allometric growth relationship was changed, and the morphological plasticity of new bamboo was induced.

Key words: Phyllostachys edulis, strip cutting, biomass allocation, allometric growth

中图分类号:

S714

王树梅,范少辉,肖箫,等. 带状采伐对毛竹地上生物量分配及异速生长的影响[J]. 南京林业大学学报（自然科学版）, 2021, 45(5): 19-24.

WANG Shumei, FAN Shaohui, XIAO Xiao, ZHENG Yaxiong, ZHOU Yang, GUAN Fengying. Effects of strip cutting on aboveground biomass accumulation and allocation, and allometric growth of Phyllostachys edulis[J].Journal of Nanjing Forestry University (Natural Science Edition), 2021, 45(5): 19-24.DOI: 10.12302/j.issn.1000-2006.202012006.

图/表 5

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处理 treatment	新竹数量/ (株·hm^-2) number of new bamboo	胸径/cm DBH	枝下高/m CBH	竹高/m bamboo height	枝下高与胸径比 ratio of CBH to DBH	竹高与胸径比 ratio of bamboo height to DBH
CK	884±128.29 b	9.96±0.53 a	6.45±0.47 a	12.07±0.48 a	0.65±0.01 a	18.66±0.37 c
M3	1 000±166.67 b	8.55±0.32 b	3.15±0.52 b	9.95±0.20 b	0.37±0.05 b	27.33±2.74 a
M9	1 926±250.51 a	7.76±0.08 c	3.12±0.17 b	9.50±0.06 b	0.40±0.02 b	23.65±1.21 b
M15	1 323±443.89 b	5.87±0.26 d	2.40±0.21 c	7.58±0.09 c	0.41±0.04 b	18.66±2.01 c

处理 treatments	出叶强度 leafing intensity	相对生物量/(kg·cm^-1) relative biomass
处理 treatments	出叶强度 leafing intensity	枝branch	叶leaf	秆stem	总生物量total biomass
CK	1.10±0.06 d	0.34±0.02 a	0.38±0.03 b	2.80±0.08 a	3.52±0.10 a
M3	1.34±0.08 c	0.28±0.02 b	0.38±0.02 b	2.34±0.07 b	3.00±0.09 b
M9	1.54±0.07 b	0.24±0.01 c	0.37±0.01 b	2.38±0.07 b	3.00±0.07 b
M15	2.23±0.15 a	0.18±0.01 d	0.41±0.02 a	1.64±0.03 c	2.23±0.06 c

参数 parameter	处理 treatment		相关生长指数 scaling exponent								等速生长检验 test of isometry				共同斜率 common slope
参数 parameter	处理 treatment		R²		P		斜率 slope		95%置信区间 95% CI		F		P		斜率 slope	P
枝(y) - 总生物量(x) branch(y)-total biomass(x)	CK	0.649		0.009		1.698 0		1.022 0~2.820 0		6.133		0.042
	M3	0.193		0.236		1.708 0		0.819 0~3.561 0		2.733		0.142
	M9	0.679		0.006		1.047 0		0.644 0~1.704 0		0.047		0.835		2.697		0.428
	M15	0.732		0.003		1.560 0		0.997 0~2.441 0		5.519		0.051
叶(y) - 总生物量(x) leaf(y)-total biomass(x)	CK	0.368		0.083		2.385 7		1.231 3~4.622 1		10.704		0.014
	M3	0.429		0.056		1.625 7		0.863 6~3.060 3		3.127		0.120
	M9	0.653		0.008		0.979 2		0.591 0~1.622 4		0.009		0.928		5.039		0.160
	M15	0.798		0.001		1.332 0		0.900 1~1.971 3		2.922		0.131
秆(y) - 总生物量(x) stem(y)-total biomass(x)	CK	0.869		0.000		0.955 3		0.695 0~1.313 1		0.104		0.756
	M3	0.915		0.000		1.070 3		0.827 1~1.384 9		0.379		0.558
	M9	0.992		0.000		1.050 3		0.970 7~1.136 3		2.179		0.183		2.766		0.417
	M15	0.971		0.000		0.929 6		0.798 0~1.082 9		1.360		0.282

带状采伐对毛竹地上生物量分配及异速生长的影响

Effects of strip cutting on aboveground biomass accumulation and allocation, and allometric growth of Phyllostachys edulis

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