Effects of Forest Types and Environmental Factors on Soil Microbial Biomass in a Coastal Sand Dune of Subtropical China

Wei GAO; Meimei LIN; Yongrong HUANG; Shide HUANG; Gongfu YE; Zhiqun HUANG

doi:10.5814/j.issn.1674-764x.2020.05.003

Journals >Journal of Resources and Ecology >Volume 11 >Issue 5 >Page 454 > Article

Journal of Resources and Ecology
Vol. 11, Issue 5, 454 (2020)

Effects of Forest Types and Environmental Factors on Soil Microbial Biomass in a Coastal Sand Dune of Subtropical China

Wei GAO^{1、1、2、2、3、3、4、4}, Meimei LIN^5、5, Yongrong HUANG^3、3, Shide HUANG^3、3, Gongfu YE^3、3, and Zhiqun HUANG^{1、1、2、2、*}

Author Affiliations

¹Institute of Geography, Fujian Normal University, Fuzhou 350007, China

¹福建师范大学地理研究所,福州 350007

²Ministry of Education Key Laboratory of Humid Subtropical Eco-Geographical Process, Fuzhou 350007, China

²湿润亚热带生态—地理过程教育部重点实验室, 福州 350007;

³Research Institute of Ecological Environment, Fujian Academy of Forestry, Fuzhou 350012, China

³福建省林业科学研究院生态环境研究所,福州 350012

⁴Qingdao Technical College, Qingdao 266520, Shandong, China

⁴青岛职业技术学院,山东青岛 266520

⁵Department of Geology and Geography, Georgia Southern University, Savannah, GA 31419, USA

⁵南乔治亚大学地质地理系,萨凡纳GA 31419,美国

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DOI: 10.5814/j.issn.1674-764x.2020.05.003 Cite this Article

Wei GAO, Meimei LIN, Yongrong HUANG, Shide HUANG, Gongfu YE, Zhiqun HUANG. Effects of Forest Types and Environmental Factors on Soil Microbial Biomass in a Coastal Sand Dune of Subtropical China[J]. Journal of Resources and Ecology, 2020, 11(5): 454 Copy Citation Text

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Variable	Eucalyptus	Pine	Acacia	Casuarinas	Secondary forest
Stand age (yr)	11	21	22	22	>50
Forest average DBH (cm)	15.60	21.00	21.10	17.90	9.70
Mean tree height (m)	11.40	13.90	12.50	14.90	5.60
Tree density (ind ha^-1)	1300	1500	950	1600	1400
Litterfall (mg ha^-1 yr^-1)	12.32ab	12.99a	10.06b	10.08b	12.67a
Litter C (g kg^-1)	473.40bc	499.70ab	513.60a	497.70ab	495.80c
Litter N (g kg^-1)	9.21c	6.58d	15.10b	8.83c	16.41a
Litter C:N ratio	51.55b	77.12a	34.07c	56.43b	28.05c
Litter cellulose (g kg^-1)	114.80d	217.90b	172.10c	275.20a	157.40c
Litter lignin (g kg^-1)	179.90e	365.90b	449.30a	227.50d	300.60c
Litter lignin: N ratio	19.60c	56.50a	29.80b	25.80b	18.30c
Root Biomass (mg ha^-1)	2.16ab	1.05b	1.84ab	3.04a	2.77a
Root C (g kg^-1)	376.40ab	365.10b	304.80c	412.70a	378.00ab
Root N (g kg^-1)	5.70c	6.30c	10.50b	19.70a	19.20a
Root C: N ratio	69.90a	63.50a	29.00b	20.90b	19.80b
Bulk density (g cm^-3)	1.36b	1.23cd	1.28bc	1.45a	1.17d
pH	5.00b	4.65c	4.73c	4.71c	6.57a
Total C (g kg^-1)	6.65b	4.33b	4.08b	3.17b	12.71a
Total N (g kg^-1)	0.54b	0.53bc	0.53bc	0.27c	1.26a
Soil C: N ratio	11.97a	8.12b	7.70b	11.58a	9.91ab
Soil NH₄⁺-N concentration (μg g^-1)	3.52c	3.78c	6.27b	4.38c	7.00a
Soil NO₃^--N concentration (μg g^-1)	0.20b	1.14b	1.47b	0.87b	18.20a
Total inorganic N (μg g^-1)	2.30b	3.90b	6.50b	3.10b	25.80a
Soil DOC (mg kg^-1)	56.20b	40.40b	42.20b	53.30b	84.80a
Soil DON (mg kg^-1)	2.80bc	3.30bc	6.80b	0.60c	22.5a0
Available P (mg kg^-1)	0.57b	0.61b	1.26b	0.89b	20.49a
Exchangeable Mg (mg kg^-1)	0.28b	0.33b	0.26b	0.32b	0.71a

Table 1.

Detailed site characteristics and topsoil properties of the five forest stands on the southeastern coast of China

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Soil depth (cm)	Forest types	Soil pH	Bulk density (g cm^-3)	Soil C content (g kg^-1)	Soil N content (g kg^-1)	Soil C: N
0-10	Eucalyptus	5.00±0.08b	1.36±0.04b	6.65±2.67b	0.54±0.09b	11.97±2.91a
	Pine	4.65±0.13c	1.23±0.06cd	4.33±1.21b	0.53±0.04bc	8.12±1.80b
	Acacia	4.73±0.12c	1.28±0.10bc	4.08±0.35b	0.53±0.05bc	7.7±0.08b
	Casuarinas	4.71±0.08c	1.45±0.04a	3.17±0.69b	0.27±0.05c	11.58±1.08a
	Secondary forest	6.57±0.22a	1.17±0.04d	12.71±4.94a	1.26±0.34a	9.91±1.23ab
10-20	Eucalyptus	4.71±0.18b	1.47±0.04a	1.85±0.34b	0.31±0.07b	6.16±0.91a
	Pine	4.72±0.19b	1.43±0.02a	1.96±0.51b	0.31±0.02b	6.32±1.50a
	Acacia	4.76±0.09b	1.39±0.09a	1.68±0.13b	0.31±0.03b	5.46±0.30a
	Casuarinas	4.92±0.05b	1.47±0.04a	1.25±0.22b	0.14±0.02c	9.27±1.26a
	Secondary forest	6.50±0.69a	1.31±0.02b	4.57±0.93a	0.54±0.09a	8.44±1.15a

Table 2.

Soil pH, soil bulk density, soil C and N content, and soil C: N ratio for the different forests (N=4)

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Forest types	T—MBC		T—MBN		W—MBC		W—MBN
Forest types	0-10 cm	10-20 cm	0-10 cm	10-20 cm	0-10 cm	10-20 cm	0-10 cm	10-20 cm
Eucalyptus	-0.216	-0.007	-0.421	-0.937^**	0.388	0.170	0.346	0.760^**
Pine	-0.027	-0.151	-0.629^**	-0.709^**	0.257	0.576^*	0.066	0.522^*
Acacia	-0.640^**	-0.217	-0.857^**	-0.786^**	0.537^*	0.057	0.553^*	0.082
Casuarinas	-0.269	-0.132	-0.785^**	-0.773^**	0.100	0.352	0.619^*	0.592^*
Secondary forest	-0.178	-0.346	-0.158	-0.413	0.734^**	0.713^**	0.618^*	0.819^**

Table 3.

Pearson correlations between seasonal variations of soil MBC and MBN and soil temperature as well as water content

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Soil depth (cm)	Variable	MBN	TC	TN	Bulk density	pH	Litterfall	Litter C	Litter N	Root biomass	Root C	Root N
0-10	MBC	0.750^**	0.697^**	-0.030	-0.609^**	0.899^**	0.202	-0.500^*	0.651^**	0.301	-0.388	0.326
0-10	MBN	1	0.820^**	-0.050	-0.586^**	0.915^**	0.408	-0.624^**	0.671^**	0.151	-0.188	0.505^*
10-20	MBC	0.855^**	0.904^**	0.274	-0.585^**	0.787^**	0.474^*	-0.459^*	0.447^*	0.113	-0.453^*	0.178
10-20	MBN	1	0.926^**	-0.130	-0.646^**	0.952^**	0.419	-0.593^**	0.643^**	0.243	-0.215	0.510^*