树种对土壤微生物生物量碳氮的影响: 同质园实验

doi:10.17521/cjpe.2021.0324

植物生态学报 ›› 2022, Vol. 46 ›› Issue (8): 882-889.DOI: 10.17521/cjpe.2021.0324 cstr: 32100.14.cjpe.2021.0324

所属专题：凋落物；微生物生态学

树种对土壤微生物生物量碳氮的影响: 同质园实验

袁春阳, 李济宏, 韩鑫, 洪宗文, 刘宣, 杜婷, 游成铭, 李晗, 谭波, 徐振锋()

长江上游林业生态工程四川省重点实验室, 长江上游森林资源保育与生态安全国家林业和草原局重点实验室, 华西雨屏区人工林生态系统研究长期科研基地, 四川农业大学生态林业研究所, 成都 611130

收稿日期:2021-09-09 接受日期:2021-11-20 出版日期:2022-08-20 发布日期:2022-01-07
作者简介:*(xuzf@sicau.edu.cn)
基金资助:
国家自然科学基金(32071745);国家自然科学基金(31870602);国家自然科学基金(31901295);四川省杰出青年科技人才计划项目(2020JDJQ0052);四川应用基础研究项(2021YJ0340);国家重点研发计划(2017YFC0505003);中国博士后科学基金(2020M673278)

Effects of tree species on soil microbial biomass carbon and nitrogen: a case study of common garden experiment

YUAN Chun-Yang, LI Ji-Hong, HAN Xin, HONG Zong-Wen, LIU Xuan, DU Ting, YOU Cheng-Ming, LI Han, TAN Bo, XU Zhen-Feng()

Forestry Ecological Engineering in the Upper Reaches of the Yangtze River Key Laboratory of Sichuan Province, National Forestry and Grassland Administration Key Laboratory of Forest Resources Conservation and Ecological Safety on the Upper Reaches of the Yangtze River, Rainy Area of West China Plantation Ecosystem Permanent Scientific Research Base, Institute of Ecology & Forestry, Sichuan Agricultural University, Chengdu 611130, China

Received:2021-09-09 Accepted:2021-11-20 Online:2022-08-20 Published:2022-01-07
Supported by:
National Natural Science Foundation of China(32071745);National Natural Science Foundation of China(31870602);National Natural Science Foundation of China(31901295);Program of Sichuan Excellent Youth Sci-Tech Foundation(2020JDJQ0052);Program of Sichuan Applied Basic Research Foundation(2021YJ0340);National Key R&D Program of China(2017YFC0505003);Chinese Postdoctoral Science Foundation(2020M673278)

摘要/Abstract

摘要：

树木通过地上/地下凋落物输入及根系活动等过程影响土壤微生物生物量, 对调节土壤环境和增加土壤肥力具有重要作用。为阐明四川盆地乡土树种对土壤微生物生物量碳(MBC)、氮(MBN)含量的影响机制, 该研究采用同质园研究方法, 以亚热带7种常见树种天竺桂(Cinnamomum japonicum)、油樟(C. longepaniculatum)、大叶樟(C. austrosinense)、桤木(Alnus cremastogyne)、香樟(C. camphora)、红椿(Toona ciliata)和香椿(T. sinensis)为研究对象, 并以撂荒地作对照, 分析了树种对不同土层MBC、MBN含量的影响。结果表明：树种显著影响土壤MBC、MBN含量及其比值。树种总体表现为正或无效应; 与撂荒地相比, 天竺桂树种效应最强, 其0-10 cm土层MBC和MBN含量分别高于撂荒地108.2%和139.6%。7个树种和撂荒地土壤MBC、MBN含量总体随土层深度的增加而减少, 而MBC:MBN剖面特征因树种而异。总体来看, 树种效应大于剖面效应; 相比于其他树种, 天竺桂更有利于土壤微生物的生长与繁殖。

关键词: 微生物生物量, 同质园, 树种效应, 土壤层次, 亚热带

Abstract:

Aims The aim of this study was to explore the effects of native tree species on soil microbial biomass carbon (MBC) and nitrogen (MBN) content in subtropical Sichuan.

Methods In the present study, Cinnamomum japonicum, C. longepaniculatum, C. austrosiense, Alnus cremastogyne, C. camphora, Toona ciliata and T. sinensis in a common garden were selected as the research objects; whereas the abandoned land as the control. The effects of tree species on soil MBC content and MBN at different depths (0-10, 10-20, and 20-30 cm) were analyzed using the method of common garden.

Important findings (1) Tree species significantly affected the content of soil MBC and MBN, as well as their ratio. Compared with the abandoned land, tree species exhibited positive or neutral effects and the effects of tree species were particularly obvious in C. japonicum.For example, the contents of MBC and MBN in 0-10 cm soil layer were 108.2% and 139.6% higher than those in the abandoned land, respectively. (2) The content of soil MBC and MBN in the both tree and abandoned land generally decreased with an increase with soil depth; however, the characteristics of MBC:MBN varied with tree species. (3) The content of soil MBC and MBN varied with tree species and soil layer. The variations caused by tree species were stronger than that caused by soil layer. Compared with other species, C. japonicum was more conducive to the growth and reproduction of soil microorganisms.

Key words: microbial biomass, common garden, effects of tree species, soil layer, subtropics

袁春阳, 李济宏, 韩鑫, 洪宗文, 刘宣, 杜婷, 游成铭, 李晗, 谭波, 徐振锋. 树种对土壤微生物生物量碳氮的影响: 同质园实验. 植物生态学报, 2022, 46(8): 882-889. DOI: 10.17521/cjpe.2021.0324

YUAN Chun-Yang, LI Ji-Hong, HAN Xin, HONG Zong-Wen, LIU Xuan, DU Ting, YOU Cheng-Ming, LI Han, TAN Bo, XU Zhen-Feng. Effects of tree species on soil microbial biomass carbon and nitrogen: a case study of common garden experiment. Chinese Journal of Plant Ecology, 2022, 46(8): 882-889. DOI: 10.17521/cjpe.2021.0324

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链接本文: https://www.plant-ecology.com/CN/10.17521/cjpe.2021.0324

https://www.plant-ecology.com/CN/Y2022/V46/I8/882

图/表 3

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树种 Tree species	凋落物现存量 Litter standing crop (kg·hm^-2)	郁闭度 Canopy density	林下植物 Understory plant
香樟 Cinnamomum camphora	986.8 ± 197.0^a	0.89 ± 0.04^a	喜旱莲子草、竹叶草等 Alternanthera philoxeroides, Oplismenus compositus, etc.
大叶樟 C. austrosinense	700.9 ± 106.4^b	0.85 ± 0.03^a	构树、喜旱莲子草、茜草等 Broussonetia papyrifera, Alternanthera philoxeroides, Rubia cordifolia, etc.
油樟 C. longepaniculatum	388.9 ± 92.5^c	0.90 ± 0.25^a	喜旱莲子草、蛇莓等 Alternanthera philoxeroides, Duchesnea indica, etc.
天竺桂 C. japonicum	160.2 ± 45.9^cd	0.73 ± 0.26^a	构树、喜旱莲子草、华西凤尾蕨等 Broussonetia papyrifera, Alternanthera philoxeroides, Pteris occidentalisinica, etc.
桤木 Alnus cremastogyne	136.9 ± 40.4^cd	0.66 ± 0.53^b	构树、喜旱莲子草、茜草等 Broussonetia papyrifera, Alternanthera philoxeroides, Rubia cordifolia, etc.
红椿 Toona ciliata	17.1 ± 3.9^d	0.67 ± 0.58^b	构树、喜旱莲子草、茜草等 Broussonetia papyrifera, Alternanthera philoxeroides, Rubia cordifolia, etc.
香椿 T. sinensis	15.6 ± 2.1^d	0.67 ± 0.05^b	构树、喜旱莲子草、竹叶草等 Broussonetia papyrifera, Alternanthera philoxeroides, Oplismenus compositus, etc.

树种 Tree species	凋落物现存量 Litter standing crop (kg·hm^-2)	郁闭度 Canopy density	林下植物 Understory plant
香樟 Cinnamomum camphora	986.8 ± 197.0^a	0.89 ± 0.04^a	喜旱莲子草、竹叶草等 Alternanthera philoxeroides, Oplismenus compositus, etc.
大叶樟 C. austrosinense	700.9 ± 106.4^b	0.85 ± 0.03^a	构树、喜旱莲子草、茜草等 Broussonetia papyrifera, Alternanthera philoxeroides, Rubia cordifolia, etc.
油樟 C. longepaniculatum	388.9 ± 92.5^c	0.90 ± 0.25^a	喜旱莲子草、蛇莓等 Alternanthera philoxeroides, Duchesnea indica, etc.
天竺桂 C. japonicum	160.2 ± 45.9^cd	0.73 ± 0.26^a	构树、喜旱莲子草、华西凤尾蕨等 Broussonetia papyrifera, Alternanthera philoxeroides, Pteris occidentalisinica, etc.
桤木 Alnus cremastogyne	136.9 ± 40.4^cd	0.66 ± 0.53^b	构树、喜旱莲子草、茜草等 Broussonetia papyrifera, Alternanthera philoxeroides, Rubia cordifolia, etc.
红椿 Toona ciliata	17.1 ± 3.9^d	0.67 ± 0.58^b	构树、喜旱莲子草、茜草等 Broussonetia papyrifera, Alternanthera philoxeroides, Rubia cordifolia, etc.
香椿 T. sinensis	15.6 ± 2.1^d	0.67 ± 0.05^b	构树、喜旱莲子草、竹叶草等 Broussonetia papyrifera, Alternanthera philoxeroides, Oplismenus compositus, etc.

因子 Factor	df	MBC含量 MBC content			MBN含量 MBN content			MBC:MBN
因子 Factor	df	F	p	SS (%)	F	p	SS (%)	F	p	SS (%)
树种 Tree species (TS)	6	20.01	<0.01	52.07	10.68	<0.01	31.30	5.50	<0.01	32.12
土层 Soil layer (SL)	2	27.12	<0.01	23.52	35.78	<0.01	34.97	2.73	>0.05	5.32
树种×土层 TS × SL	12	1.19	>0.05	6.19	2.25	<0.05	13.21	1.85	>0.05	21.64

因子 Factor	df	MBC含量 MBC content			MBN含量 MBN content			MBC:MBN
因子 Factor	df	F	p	SS (%)	F	p	SS (%)	F	p	SS (%)
树种 Tree species (TS)	6	20.01	<0.01	52.07	10.68	<0.01	31.30	5.50	<0.01	32.12
土层 Soil layer (SL)	2	27.12	<0.01	23.52	35.78	<0.01	34.97	2.73	>0.05	5.32
树种×土层 TS × SL	12	1.19	>0.05	6.19	2.25	<0.05	13.21	1.85	>0.05	21.64

树种对土壤微生物生物量碳氮的影响: 同质园实验

Effects of tree species on soil microbial biomass carbon and nitrogen: a case study of common garden experiment

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