Effects of topography on the soil fertility quality in Quercus acutissima plantation

doi:10.12302/j.issn.1000-2006.202109023

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2022, Vol. 46 ›› Issue (5): 161-168.doi: 10.12302/j.issn.1000-2006.202109023

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Effects of topography on the soil fertility quality in Quercus acutissima plantation

LI Huizhi¹(), GUAN Qingwei¹^,^*(), ZHAO Jiahao¹, LI Junjie¹, WANG Lei¹, LI Fengfeng², ZUO Xingping², CHEN Bin¹

1. College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
2. Haizhou District Forestry Technical Guidance Station of Lianyungang City, Lianyungang 222000, China

Received:2021-09-12 Revised:2022-03-09 Online:2022-09-30 Published:2022-10-19
Contact: GUAN Qingwei E-mail:lihuizhi1004@163.com;guanjapan999@163.com

Abstract

Abstract:

【Objective】 Quercus acutissima is among the main tree species in warm temperate and subtropical forests of China. This study aims to investigate the effects of topography on the soil fertility quality of Q. acutissima plantation, in purpose of providing theoretical bases for rational utilization of forest resources. 【Method】In this study, we analyzed 15 soil indexes of five types of topographies (gentle slope, concave sunny slope, convex sunny slope, concave shady slope and convex shady slope) in Q. acutissima plantation. Then, the minimum data set of soil quality evaluation by combining principal component analysis and correlation analysis. The soil quality of Q. acutissima plantation was also comprehensively evaluated using the weighted additive index. 【Result】Among the five types of topography, concave sunny slope had the highest levels of pH, soil organic matter, total nitrogen content, and total potassium content; concave shady slope had the highest levels of soil total phosphorus content, available phosphorus content, soil microbial nitrogen content, urease activity and acid phosphatase activity; and convex shady slope had the lowest level of soil bulk density. The results of principal component analysis and correlation analysis suggested that the smallest data set for soil fertility quality evaluation should include soil organic matter, pH, bulk density, urease activity, and invertase activity. In different topographies, the rank of soil fertility quality index in different topographies was concave sunny slope (0.533) > gentle slope (0.511) > concave shady slope (0.510) > convex shady slope (0.495) > convex sunny slope (0.482). 【Conclusion】In this studied Q. acutissima plantation, the topography significantly influenced the soil fertility quality via its effects on five key indicators, i.e., soil pH, organic matter, soil bulk density, urease activity and invertase activity. The concave sunny slope facilitated the accumulation of soil nutrients, leading to the highest level of soil fertility quality among different topographic types.

Key words: topography, Quercus acutissima plantation, soil physical and chemical properties, soil enzyme activities, soil quality evaluation

CLC Number:

S714

LI Huizhi, GUAN Qingwei, ZHAO Jiahao, LI Junjie, WANG Lei, LI Fengfeng, ZUO Xingping, CHEN Bin. Effects of topography on the soil fertility quality in Quercus acutissima plantation[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2022, 46(5): 161-168.

Figures/Tables 6

Table 1

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Table 5

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地形类型 topography type	坡度/(°) slope degree	坡向 slope aspect	坡形 slope shape
平缓坡地gentle slope	<15	-	-
阳坡凸地convex sunny slope	≥15~30	南、东南、西南	上凸形
阳坡凹地concave sunny slope	≥15~30	南、东南、西南	下凹形
阴坡凸地convex shady slope	≥15~30	北、东北、西北	上凸形
阴坡凹地concave shady slope	≥15~30	北、东北、西北	下凹形

地形类型 topography type	pH	土壤容重/ (g·cm^-3) soil bulk density	含量content
地形类型 topography type	pH	土壤容重/ (g·cm^-3) soil bulk density	有机质/ (g·kg^-1) organic matter	全氮/ (g·kg^-1) TN	全磷/ (g·kg^-1) TP	有效磷/ (mg·kg^-1) AP	全钾/ (g·kg^-1) TK	速效钾/ (mg·kg^-1) AK
平缓坡地 gentle slope	4.69±0.05 b	1.74±0.02 a	34.94±2.43 b	1.70±0.15 b	0.13±0.01 ab	2.32±0.12 c	15.79±0.18 b	79.40±1.67 b
阳坡凹地 concave sunny slope	4.51±0.02 b	1.33±0.09 b	63.62±5.48 a	2.73±0.22 a	0.11±0.02 ab	2.12±0.10 c	17.47±0.06 a	65.07±6.33 a
阳坡凸地 convex sunny slope	4.59±0.04 b	1.53±0.04 ab	35.11±8.83 b	1.77±0.32 b	0.05±0.01 b	3.03±0.26 b	16.71±0.11 ab	71.19±3.70 ab
阴坡凹地 concave shady slope	5.19±0.16 a	1.32±0.02 b	38.9±3.73 b	1.97±0.09 ab	0.17±0.04 a	3.61±0.21 a	14.20±0.61 c	46.36±7.71 a
阴坡凸地 convex shady slope	4.74±0.06 b	1.19±0.13 b	30.11±10.59 b	1.53±0.35 b	0.09±0.02 b	3.04±0.11 b	15.72±0.19 b	53.92±10.32 b

地形类型 topography type	含量/(mg·g^-1) content		酶活性/(mg·g^-1·d^-1) enzymatic activity
地形类型 topography type	微生物生物量碳 microbial biomass carbon	微生物生物量氮 microbial biomass nitrogen	脲酶 urease	过氧化氢酶 catalase	蔗糖酶 sucrase	酸性磷酸酶 acid phosphatase
平缓坡地gentle slope	397.57±12.04 a	19.21±0.58 b	0.60±0.01 b	0.92±0.06 a	38.32±5.68 a	3.14±0.10 c
阳坡凹地concave sunny slope	343.56±14.36 a	12.56±0.96 c	0.60±0.01 b	0.62±0.06 a	15.60±3.77 b	3.46±0.03 b
阳坡凸地convex sunny slope	431.64±14.77 a	11.06±2.50 c	0.58±0.01 b	0.92±0.10 a	27.54±0.92 ab	3.04±0.05 c
阴坡凹地concave shady slope	547.35±26.80 a	33.15±2.45 a	0.73±0.02 a	0.92±0.16 a	30.61±2.37 ab	4.18±0.18 a
阴坡凸地convex shady slope	359.91±19.96 a	10.41±1.52 c	0.60±0.03 b	0.75±0.09 a	18.95±6.72 b	3.66±0.07 b

指标 index	主成分 principal component			Norm值 Norm value	分组 group
指标 index	1	2	3	Norm值 Norm value	分组 group
pH	0.942	-0.101	0.027	2.223	1
酸性磷酸酶活性 acid phosphatase activity	0.878	0.355	-0.211	2.165	1
全钾含量 total potassium content	-0.901	0.194	-0.136	2.153	1
脲酶活性 urease activity	0.876	0.095	0.077	2.072	1
微生物生物量氮 microbial biomass nitrogen	0.846	0.002	0.369	2.056	1
全磷含量 total phosphorus content	0.682	0.363	0.473	1.828	1
有效磷含量 available phosphorus content	0.700	-0.348	-0.403	1.827	1
速效钾含量 available potassium content	-0.631	-0.258	0.409	1.643	1
有机质含量 soil organic matter content	-0.194	0.917	0.301	1.603	2
全氮含量 total nitrogen content	-0.139	0.904	0.289	1.547	2
土壤容重 soil bulk density	-0.315	-0.456	0.692	1.413	3
蔗糖酶活性 sucrase activity	0.278	-0.481	0.690	1.389	3
特征值eigen values	5.542	2.601	1.889
方差贡献率/% variance contribution rate	46.183	21.675	15.741
累积方差贡献率/% cumulative variance contribution rate	46.183	67.858	83.599

指标 index	pH	SOM	TN	TP	AP	TK	AK	MBN	URE	INV	ACP	BD
pH	1.00
SOM	-0.40	1.00
TN	-0.34	0.99^**	1.00
TP	0.36	0.29	0.26	1.00
AP	0.52^*	-0.53^*	-0.43	-0.08	1.00
TK	-0.84^**	0.27	0.23	-0.53^*	-0.55^*	1.00
AK	-0.19	0.01	-0.03	-0.16	-0.47	0.38	1.00
MBN	0.50	0.12	0.15	0.57^*	0.24	-0.62^*	-0.16	1.00
URE	0.44	0.06	0.09	0.54^*	0.40	-0.34	-0.07	0.50	1.00
INV	0.39	-0.29	-0.31	0.38	0.28	-0.43	0.30	0.48	0.43	1.00
ACP	0.52^*	0.03	0.08	0.51	0.37	-0.53^*	-0.78^**	0.30	0.42	-0.16	1.00
BD	-0.17	-0.11	-0.16	-0.16	-0.28	0.10	0.55^*	0.14	-0.33	0.49	-0.73^**	1.00

Effects of topography on the soil fertility quality in Quercus acutissima plantation

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