Spatial Distribution Characteristics of Soil C:N:P:K Eco-Stoichiometry of Farmland and Grassland in the Agro-Pastoral Ecotone in Inner Mongolia, China

Ecological stoichiometry (ES) is an important index that reflects the balance of various elements in ecological processes. Therefore, it is of great significance to understand the soil nutrient cycle to clarify the environmental control of soil carbon (C), nitrogen (N), phosphorus (P), and potassium...

Full description

Saved in:
Bibliographic Details
Published in:Agronomy (Basel) Vol. 14; no. 2; p. 346
Main Authors: Zhang, Yanli, Liu, Miao, Han, Li, Yang, Jinhu, Zhao, Xinyao, Qu, Jiahui, Li, Lijun, Bai, Yunlong, Yan, Dong, Hou, Guannan
Format: Journal Article
Language:English
Published: Basel MDPI AG 01.02.2024
Subjects:
Agricultural development
Agricultural land
Agricultural production
agricultural soils
Agriculture
agro-pastoral ecotone
agronomy
Analysis
Annual precipitation
Biogeochemistry
C:N:P:K stoichiometry
Carbon
Carbon content
Chemical elements
China
ecotones
Environmental control
Environmental effects
Environmental factors
Fertilization
Global positioning systems
GPS
grassland soils
Grasslands
Heterogeneity
Land resources
Land use
land use pattern
Mineralization
Mountains
Nitrogen
Nutrient cycles
Organic carbon
Organic soils
Phosphorus
Plant growth
Potassium
Precipitation
Ratios
soil ecology
Soil nutrients
soil organic carbon
Soil temperature
Soils
Spatial distribution
Spatial heterogeneity
spatial variation
Stoichiometry
Sustainable development
temperature
Topography
total nitrogen
total phosphorus
Wheat
China
United States > US
Mongolia
ISSN:2073-4395, 2073-4395
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Ecological stoichiometry (ES) is an important index that reflects the balance of various elements in ecological processes. Therefore, it is of great significance to understand the soil nutrient cycle to clarify the environmental control of soil carbon (C), nitrogen (N), phosphorus (P), and potassium (K). In this study, we analyzed the spatial distribution of soil C, N, P, and K contents and the C:N:P:K stoichiometric characteristics of 0–20 cm and 20–40 cm of farmland and grassland in four agro-pastoral areas in Inner Mongolia. Spearman correlation was used to analyze the effects of environmental factors on the soil C:N:P:K stoichiometric relationship. The results showed that there was no fixed Redfield ratio for the soil stoichiometric relationship of farmland and grassland in Inner Mongolia, and the values were 15:2:1:9 to 145:10:1:26 and 25:1:1:29 to 228:15:1:65, respectively. The stoichiometric relationships between farmland and grassland were consistent with the law of geographical and spatial heterogeneity. The ratios of C:N, C:P, C:K, N:P, and N:K showed an N distribution from west to east, while the ratio of P:K showed a V distribution. The stoichiometric relationships in grassland soil were mainly affected by soil organic carbon and total nitrogen content, while those in farmland were mainly affected by total nitrogen and total phosphorus content. The annual mean precipitation has a significant effect on stoichiometric relationships in farmland, while the annual mean temperature has a more significant effect on grassland. In conclusion, the spatial distribution difference in the soil stoichiometric relationship in the agro-pastoral ecotone of Inner Mongolia was more significant than the difference in the land use pattern. The influences of annual mean temperature and annual mean precipitation on soil ecological stoichiometry were in accordance with the geographical spatial similarity law. Compared with grassland, the stoichiometric relationship of farmland soil was greatly affected by fertilization, and farmland in this region was mainly limited by carbon and nitrogen. Thus, field management should be carried out according to local conditions. This study is of great significance as it promotes the rational utilization of land resources and the sustainable development of agriculture.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
content type line 23
ISSN:2073-4395
2073-4395
DOI:10.3390/agronomy14020346