天山北坡中部天山云杉1 a生天然更新幼苗存活数量与功能性状的微生境分析

doi:10.6048/j.issn.1001-4330.2023.02.024

新疆农业科学 ›› 2023, Vol. 60 ›› Issue (2): 454-463.DOI: 10.6048/j.issn.1001-4330.2023.02.024

• 林业·草业·畜牧兽医 • 上一篇下一篇

天山北坡中部天山云杉1 a生天然更新幼苗存活数量与功能性状的微生境分析

胡文聪¹(), 潘存德¹(), 赵善超², 宋梦真¹, 童海麦¹, 田晨阳¹

1.新疆农业大学林学与风景园林学院/新疆教育厅干旱区林业生态与产业技术重点实验室,乌鲁木齐 830052
2.新疆林业和草原局,乌鲁木齐 830000

收稿日期:2022-08-02 出版日期:2023-02-20 发布日期:2023-03-31
通信作者: 潘存德(1964―),男,新疆奇台人,教授,博士,博士生导师,研究方向为森林生态与经营,(E-mail)pancunde@163.com
作者简介:胡文聪(1997―),男,新疆昌吉人,硕士研究生,研究方向为天然林保护修复,(E-mail)718491308@qq.com
基金资助:
中央财政林业改革发展资金任务“天保工程区人工促进天山云杉更新试验示范幼苗监测”(Planning Finance Office of Xinjiang Forestry and Grassland Bureau〔2020〕942);国家自然科学基金“天山云杉天然林地土壤中的自毒物质及其来源研究”(30960313)

Microhabitat Interpretation of Survival Quantity and Functional Traits of One-year-old Natural Regeneration Seedlings of Picea schrenkiana var. tianschanica in the Central Part of the Northern Slope of Tianshan Mountains, Xinjiang

HU Wencong¹(), PAN Cunde¹(), ZHAO Shanchao², SONG Mengzhen¹, TONG Haimai¹, TIAN Chenyang¹

1. Key Laboratory of Forestry Ecology and Industry Technology in Arid Region, Education Department of Xinjiang/ College of Landscape Architecture Forestry and Horticulture,Xinjiang Agricultural University, Urumqi 830052, China
2. Xinjiang Forestry and Grassland Bureau, Urumqi 830000, China

Received:2022-08-02 Online:2023-02-20 Published:2023-03-31
Correspondence author: PAN Cunde (1964-), male, native place: Qitai, Xinjiang. Professor, research field: Forest ecology and management,(E-mail) pancunde@163.com
Supported by:
Central Fiscal Forestry Reform and Development Fund Tasks"Seedling Monitoring of Artificial Promotion of Tianshan Spruceregeneration Test in Natural Forest Protection Project Area"(Planning Finance Office of Xinjiang Forestry and Grassland Bureau〔2020〕942);The National Natural Science Foundation of China "Study on Autotoxic Substances and Their Sources in the Soil of Tianshan Spruce Natural Woodland "(30960313)

摘要/Abstract

摘要：

【目的】 分析天山云杉(Picea schrenkiana var.tianschanica)1 a生天然更新幼苗存活数量和功能性状与微生境因子的相互作用及关系,为环境筛(environmental filter)在天山云杉幼苗定居阶段筛选作用提供参考。【方法】 采用冗余分析(redundancy analysis,RDA)方法,分析天山云杉1 a生天然更新幼苗存活数量和功能性状与微生境因子的关系,并选用层次分割法定量分解微生境因子的解释率。【结果】 显著影响天山云杉1 a生天然更新幼苗存活数量和功能性状的微生境因子有苔藓厚度、枯落物厚度、草本盖度、根系盘结层厚度、大树邻体效应和海拔、坡位,可解释47.43%的天山云杉1 a生天然更新幼苗存活数量和功能性状变异。其中,由苔藓、草本、枯落物构成的林下地被物的解释率为26.16%,根系盘结层厚度和海拔高度的解释率分别为9.79%和5.95%。【结论】 天山云杉林下的枯落物、苔藓和土壤根系盘结层厚度,以及林地所处的海拔高度对天山云杉1 a生天然更新幼苗的存活具有较强的筛选作用。

关键词: 天山云杉; 天然更新; 幼苗; 功能性状; 冗余分析

Abstract:

【Objective】 To analyze the interaction and relationship between survival quantity and functional traits of one-year-old natural regeneration seedlings of Tianshan spruce (Picea schrenkiana var.tianschanica) and microhabitat factors in order to deepen the scientific understanding of the role of environmental filter in the sedentary stage of Tianshan spruce seedlings. 【Methods】 The redundancy analysis (RDA) method was used to analyze the relationship between survival number and functional traits of one-year-old natural regeneration seedlings of Tianshan spruce and microhabitat factors, and hierarchical segmentation method was used to quantitatively decompose the interpretation rate of microhabitat factors. 【Results】 The microhabitat factors that could significantly affect the survival quantity and functional traits of one-year-old natural regeneration seedlings of Tianshan spruce were moss thickness, litter thickness, herbaceous coverage, root system twine layer thickness, tree neighborhood effect, altitude, and slope position.They could explain 47.43% of the variation of survival quantity and functional traits of one-year-old natural regeneration seedlings of Tianshan spruce.Among them, the interpretation rate of ground cover under the forest composed of moss, herbs and litter was 26.16%, and the explanation rates of root disk thickness and altitude were 9.79% and 5.95%, respectively. 【Conclusion】 The thickness of litter, moss and soil root system twine layer under the Tianshan spruce forest, as well as the altitude of the woodland have a strong screening effect on the survival of one-year-old natural regeneration seedlings of Tianshan spruce.

Key words: Picea schrenkiana var. tianschanica; natural regeneration; seedling; functional trait; redundancy analysis

中图分类号:

胡文聪, 潘存德, 赵善超, 宋梦真, 童海麦, 田晨阳. 天山北坡中部天山云杉1 a生天然更新幼苗存活数量与功能性状的微生境分析[J]. 新疆农业科学, 2023, 60(2): 454-463.

HU Wencong, PAN Cunde, ZHAO Shanchao, SONG Mengzhen, TONG Haimai, TIAN Chenyang. Microhabitat Interpretation of Survival Quantity and Functional Traits of One-year-old Natural Regeneration Seedlings of Picea schrenkiana var. tianschanica in the Central Part of the Northern Slope of Tianshan Mountains, Xinjiang[J]. Xinjiang Agricultural Sciences, 2023, 60(2): 454-463.

图/表 6

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变量Variable	最小值Min	最大值Max	平均值Mean	标准差SD	变异系数CV(%)
草本盖度 Herbaceous coverage,Hc(%)	8.0	98.0	38.2	21.0	54.91
草本高度 Herbaceous height,Hh(cm)	0.1	17.5	6.5	2.5	39.01
苔藓盖度 Moss coverage,Mc(%)	0	100	48.0	37.3	77.57
苔藓厚度 Moss thickness,Mt(cm)	0	6.7	2.8	1.9	67.29
枯落物盖度 Litter coverage,Lc(%)	0	99.0	22.0	26.9	122.58
枯落物厚度 Litter thickness,Lt(cm)	0	4.3	1.1	1.0	97.43
根系盘结层厚度 Root system twine layer thickness,Rt(cm)	0	7.7	2.6	2.0	77.62
腐殖质厚度 Humus thickness,Ht(cm)	6.6	28.9	15.6	5.1	32.53
大树邻体 Adult neighbor effect,Ane(m²)	0	0.6	0.2	0.1	81.92
坡度Slope,Slo(°)	7.5	44.9	23.5	8.0	34.11
海拔Elevation,Ele(m)	1 859	2 365	2 128	121.1	5.70
根平均长度 Average length of root(cm)	3.49	11.21	6.70	15.54	23.23
根平均直径 Average root dianefer(cm)	0.20	0.30	0.30	0.02	8.30
根平均体积 Average root volume(cm³)	0.02	0.10	0.04	0.01	35.80
根平均干重 Average dry weight of root(g)	0.04	0.12	0.07	0.01	18.58
叶平均面积 Average leaf area(cm²)	1.00	1.50	1.20	0.10	12.50
茎平均体积 Average stem volume(cm³)	0.03	0.07	0.05	0.01	15.21
茎平均干重 Average dry weight of stem(g)	0.02	0.08	0.03	0.01	36.18

变量Variable	最小值Min	最大值Max	平均值Mean	标准差SD	变异系数CV(%)
草本盖度 Herbaceous coverage,Hc(%)	8.0	98.0	38.2	21.0	54.91
草本高度 Herbaceous height,Hh(cm)	0.1	17.5	6.5	2.5	39.01
苔藓盖度 Moss coverage,Mc(%)	0	100	48.0	37.3	77.57
苔藓厚度 Moss thickness,Mt(cm)	0	6.7	2.8	1.9	67.29
枯落物盖度 Litter coverage,Lc(%)	0	99.0	22.0	26.9	122.58
枯落物厚度 Litter thickness,Lt(cm)	0	4.3	1.1	1.0	97.43
根系盘结层厚度 Root system twine layer thickness,Rt(cm)	0	7.7	2.6	2.0	77.62
腐殖质厚度 Humus thickness,Ht(cm)	6.6	28.9	15.6	5.1	32.53
大树邻体 Adult neighbor effect,Ane(m²)	0	0.6	0.2	0.1	81.92
坡度Slope,Slo(°)	7.5	44.9	23.5	8.0	34.11
海拔Elevation,Ele(m)	1 859	2 365	2 128	121.1	5.70
根平均长度 Average length of root(cm)	3.49	11.21	6.70	15.54	23.23
根平均直径 Average root dianefer(cm)	0.20	0.30	0.30	0.02	8.30
根平均体积 Average root volume(cm³)	0.02	0.10	0.04	0.01	35.80
根平均干重 Average dry weight of root(g)	0.04	0.12	0.07	0.01	18.58
叶平均面积 Average leaf area(cm²)	1.00	1.50	1.20	0.10	12.50
茎平均体积 Average stem volume(cm³)	0.03	0.07	0.05	0.01	15.21
茎平均干重 Average dry weight of stem(g)	0.02	0.08	0.03	0.01	36.18

排序轴 Sort axis	第一轴RDA₁ Drimary shaft RDA₁	第二轴RDA₂ Second asis RDA₂	第三轴RDA₃ Third axis RDA₃	第四轴RDA₄ Fourth axis RDA₄
特征根 Eigenvalues	0.083 7	0.044 2	0.022 6	0.020 6
方差解释率 Variance explained	0.240 9	0.122 8	0.083 4	0.075 3
累计方差解释率(R²) Cumulative variance explained	0.240 9	0.363 7	0.447 1	0.522 4

排序轴 Sort axis	第一轴RDA₁ Drimary shaft RDA₁	第二轴RDA₂ Second asis RDA₂	第三轴RDA₃ Third axis RDA₃	第四轴RDA₄ Fourth axis RDA₄
特征根 Eigenvalues	0.083 7	0.044 2	0.022 6	0.020 6
方差解释率 Variance explained	0.240 9	0.122 8	0.083 4	0.075 3
累计方差解释率(R²) Cumulative variance explained	0.240 9	0.363 7	0.447 1	0.522 4

微生境因子 Microhabitat factor		与RDA排序轴的相关系数(r) Correlation coefficient with RDA sort axis (r)		置换检验结果 Permutation test results
微生境因子 Microhabitat factor		RDA₁	RDA₂	F value	P value
Ane		-0.957 6	0.288 1	6.62	0.001^**
Hc		-0.311 0	-0.950 4	5.93	0.001^**
Ele		-0.554 6	-0.832 2	12.65	0.001^**
Rt		0.637 2	-0.770 7	22.10	0.001^**
Mt		0.923 0	0.384 7	20.26	0.001^**
Lt		-0.987 4	-0.003 7	24.42	0.001^**
Sp	Sp Bottom	0.135 9	-0.136 4	2.67	0.004^**
	Sp Middle	0.015 4	0.084 6
	Sp Upper	-0.108 8	-0.139 0

天山北坡中部天山云杉1 a生天然更新幼苗存活数量与功能性状的微生境分析

Microhabitat Interpretation of Survival Quantity and Functional Traits of One-year-old Natural Regeneration Seedlings of Picea schrenkiana var. tianschanica in the Central Part of the Northern Slope of Tianshan Mountains, Xinjiang

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参考文献 32

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Metrics

微生境因子 Microhabitat factor	Ane	Hc	Ele	Rt	Mt	Lt	Sp
解释率(R²adj) Independent	0.013 3	0.015 5	0.059 5	0.097 9	0.108 5	0.151 5	0.028 1
解释比率 Interpretation perc	2.8	3.27	12.54	20.64	22.88	31.94	5.92

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