Spatial patterns and influencing factors of soil microbial carbon， nitrogen and phosphorus stoichiometry in Horqin Sandy Land

doi:10.7522/j.issn.1000-694X.2025.00106

Journal of Desert Research ›› 2025, Vol. 45 ›› Issue (4): 153-165.DOI: 10.7522/j.issn.1000-694X.2025.00106

Spatial patterns and influencing factors of soil microbial carbon， nitrogen and phosphorus stoichiometry in Horqin Sandy Land

Bo Yao¹^,²^,³(), Jie Lian¹^,²^,³, Xiangwen Gong⁴, Xiaoming Mou¹^,²^,³, Yulin Li¹^,²^,³, Yuqiang Li¹^,²^,³, Xuyang Wang²^,³()

^1.State Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands /, Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
^2.Naiman Desertification Research Station, Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
^3.University of Chinese Academy of Sciences，Beijing 100049，China
^4.School of Geographical Sciences / Chongqing Jinfo Mountain Karst Ecosystem National Observation and Research Station，Southwest University，Chongqing 400715，China

Received:2025-04-25 Revised:2025-07-10 Online:2025-07-20 Published:2025-08-18
Contact: Xuyang Wang

Abstract

Abstract:

Understanding the spatial pattern of soil and microbial carbon， nitrogen and phosphorus （C∶N∶P） stoichiometry and its drivers are important for regulating ecosystem function and responding to global climate change. In this study， we applied geostatistical methods and constructed a random forest model to quantify the drivers of the spatial distribution of soil and microbial C∶N∶P stoichiometry in the Horqin Sandy Land through a regional field survey. The results showed that low-value zones for soil microbial carbon （MBC）， nitrogen （MBN） and phosphorus （MBP） were primarily located in the central part of the Horqin Sandy Land. In contrast， high-value zones were mainly found in the northern part of the Horqin Sandy Land， specifically in the foothills of the Greater Khingan Mountains. The ratios of MBC∶MBP and MBN∶MBP gradually increased from south to north. In the Horqin Sandy Land， the MBC∶MBN ratio ranged from 0.63 to 28.29 （average： 7.3）， the MBC∶MBP ratio from 0.35 to 91.27 （average： 11.26）， and the MBN∶MBP ratio from 0.07 to 10.16 （average： 1.56）. These values were all lower than the global and Chinese stoichiometric ratios. Overall， the region exhibited limitations in C， N and P， with MBC and MBN content primarily influencing the spatial variation of soil microbial biomass C∶N∶P in the Horqin Sandy Land.

Key words: soil carbon， nitrogen and phosphorus, soil microbial biomass, ecological stoichiometry, spatial pattern, Horqin Sandy Land

CLC Number:

Q939.96

Bo Yao, Jie Lian, Xiangwen Gong, Xiaoming Mou, Yulin Li, Yuqiang Li, Xuyang Wang. Spatial patterns and influencing factors of soil microbial carbon， nitrogen and phosphorus stoichiometry in Horqin Sandy Land[J]. Journal of Desert Research, 2025, 45(4): 153-165.

Figures/Tables 9

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变量	最小值	最大值	平均值	标准误差	偏度	峰度
SOC/(g·kg^-1)	0.16	20.20	4.89	3.43	1.17	2.02
TN/(g·kg^-1)	0.04	2.21	0.46	0.38	1.34	2.23
TP/(g·kg^-1)	0.02	0.48	0.15	0.10	1.52	1.90
C∶N	1.12	94.06	14.27	13.93	3.83	16.99
C∶P	1.73	108.31	35.63	20.30	1.03	1.22
N∶P	0.78	7.79	2.91	1.29	0.92	1.12
MBC/(mg·kg^-1)	1.24	575.02	112.92	129.77	1.58	1.83
MBN/(mg·kg^-1)	0.38	88.42	16.90	19.08	1.61	2.30
MBP/(mg·kg^-1)	1.00	74.80	11.41	11.44	2.27	6.81
MBC∶MBN	0.63	21.90	7.29	4.43	0.98	0.47
MBC∶MBP	0.35	91.27	11.26	14.11	3.05	10.77
MBN∶MBP	0.07	10.16	1.56	1.47	2.69	9.80
pH	6.60	8.81	7.02	0.74	-0.06	2.10
BD/(g·cm^-3)	1.47	1.83	1.63	0.06	0.10	0.49

变量	最小值	最大值	平均值	标准误差	偏度	峰度
SOC/(g·kg^-1)	0.16	20.20	4.89	3.43	1.17	2.02
TN/(g·kg^-1)	0.04	2.21	0.46	0.38	1.34	2.23
TP/(g·kg^-1)	0.02	0.48	0.15	0.10	1.52	1.90
C∶N	1.12	94.06	14.27	13.93	3.83	16.99
C∶P	1.73	108.31	35.63	20.30	1.03	1.22
N∶P	0.78	7.79	2.91	1.29	0.92	1.12
MBC/(mg·kg^-1)	1.24	575.02	112.92	129.77	1.58	1.83
MBN/(mg·kg^-1)	0.38	88.42	16.90	19.08	1.61	2.30
MBP/(mg·kg^-1)	1.00	74.80	11.41	11.44	2.27	6.81
MBC∶MBN	0.63	21.90	7.29	4.43	0.98	0.47
MBC∶MBP	0.35	91.27	11.26	14.11	3.05	10.77
MBN∶MBP	0.07	10.16	1.56	1.47	2.69	9.80
pH	6.60	8.81	7.02	0.74	-0.06	2.10
BD/(g·cm^-3)	1.47	1.83	1.63	0.06	0.10	0.49

指标	MAE	RMSE	MSE	RMSSE
SOC	-0.060	3.002	-0.021	1.035
TN	-0.008	0.322	-0.025	1.049
TP	-0.004	0.066	-0.055	1.046
C:N	0.237	11.781	0.017	0.839
C:P	0.531	16.439	0.027	0.922
N:P	0.037	1.251	0.028	0.991

指标	MAE	RMSE	MSE	RMSSE
SOC	-0.060	3.002	-0.021	1.035
TN	-0.008	0.322	-0.025	1.049
TP	-0.004	0.066	-0.055	1.046
C:N	0.237	11.781	0.017	0.839
C:P	0.531	16.439	0.027	0.922
N:P	0.037	1.251	0.028	0.991

指标	MAE	RMSE	MSE	RMSSE
MBC	-2.468	104.329	-0.026	1.023
MBN	-0.329	15.565	-0.024	1.036
MBP	-0.189	10.148	-0.020	1.052
MBC∶MBN	-0.006	4.080	-0.003	0.943
MBC∶MBP	-0.031	11.294	-0.012	1.074
MBN∶MBP	-0.021	1.228	-0.016	1.012

Spatial patterns and influencing factors of soil microbial carbon， nitrogen and phosphorus stoichiometry in Horqin Sandy Land

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