Distribution pattern of soil physical and chemical properties of plantation forest in northern agro-pastoral ecotone

doi:10.7522/j.issn.1000-694X.2024.00023

Journal of Desert Research ›› 2024, Vol. 44 ›› Issue (2): 283-294.DOI: 10.7522/j.issn.1000-694X.2024.00023

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Distribution pattern of soil physical and chemical properties of plantation forest in northern agro-pastoral ecotone

Hongling Yang¹(), Bo Yao¹^,², Yongzhong Su¹(), Yulin Li¹()

^1.Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
^2.University of Chinese Academy of Sciences，Beijing 100049，China

Received:2023-12-03 Revised:2024-02-18 Online:2024-03-20 Published:2024-03-19
Contact: Yongzhong Su,Yulin Li

Abstract

Abstract:

The northern agro-pastoral ecotone is the second largest ecological security barrie， which is a typical ecological fragile zone in northern China. In this study， based on field investigation and indoor analysis， the spatial distribution pattern of soil physicochemical properties in the planted forest in the northern agro-pastoral ecotone was discussed. Combined with climatic factors and tree species identities， the differences of soil physicochemical properties between trees and shrubs and thevariations of soil physicochemical properties in the planted forest with climate gradient were analysed. The results show that：（1） The overall soil of the plantation in the agro-pastoral ecotone was weakly alkaline， the electrical conductivity was 153.55±3.02 μS·cm^-1， the soil bulk density ranged from 0.53 to 2.28 g·cm^-3， the soil water content was 12.54%±0.62%， and the soil total carbon and nitrogen contents were 13.74±0.61 g·kg^-1 and 0.88±0.05 g·kg^-1， respectively. （2） From west to east， soil acidity increased， soil bulk density decreased， soil water content increased， total carbon content decreased， and total nitrogen content increased. （3） On the climate gradient， soil pH， conductivity and bulk density were negatively correlated with precipitation， while soil water content， total carbon and total nitrogen were positively correlated with precipitation. The soil total carbon and total nitrogen contents were negatively correlated with temperature and aridity index. （4） On the regional scale， soil pH of tree soil was significantly lower than that of shrub soil， and soil total carbon and nitrogen contents of shrub soil were higher than those of treesoil.

Key words: plantation forest, agro-pastoral ecotone, soil carbon content, soil physicochemical properties

CLC Number:

S153

Hongling Yang, Bo Yao, Yongzhong Su, Yulin Li. Distribution pattern of soil physical and chemical properties of plantation forest in northern agro-pastoral ecotone[J]. Journal of Desert Research, 2024, 44(2): 283-294.

Figures/Tables 10

Fig.1 Distribution of sample sites of plantation forests in the agro-pastoral ecotone of Northern China

Table 1 Basic informetion of sample sites of plantation forests in the agro-pastoral ecotone of Northern China

项目	乔木林	灌木林
样点个数	167	68
优势种	杨树(Populus przewalskii)、樟子松(Pinus sylvestris var.mongolica)、油松(Pinus tabulaeformis）	锦鸡儿属(Caragana)、山杏(Prunus sibirica)、黄柳(Salix gordejevii)
经度/(°E)	107.76—122.57	107.45—122.22
纬度/(°N)	37.49—46.10	37.36—45.65
海拔/m	351~1628	307~1566
年均气温/℃	1.82~8.94	3.59~8.83
年降水量/mm	336.72~507.23	357.42~442.23
干燥度指数	1.01~1.71	1.14~1.62
胸径/cm	29.51~98.04	—
树高/m	6.29~21.68	1.63~6.81

Fig.2 Spatial distribution of annual precipitation， temperature and aridity index in the agro-pastoral ecotone of Northern China from 2000 to 2020

Fig.3 Distribution of soil physicochemical properties of plantation forests in the agro-pastoral ecotone of Northern China

Fig.4 Differences in soil physicochemical properties of different plantation forest types in the agro-pastoral ecotone of Northern China

Fig.5 Spatial distribution characteristics of soil physicochemical properties of plantation forest in the agro-pastoral ecotone of Northern China

Fig.6 Spatial distribution characteristics of soil total carbon and nitrogen content of plantation forest in the agro-pastoral ecotone of Northern China

Fig.7 Patterns of soil physicochemical properties of plantation forest along climate gradients in the agro-pastoral ecotone of Northern China

Fig.8 Patterns of soil total carbon and nitrogen content of plantation forest along climate gradients in the agro-pastoral ecotone of Northern China

Fig.9 Correlations between soil physicochemical properties and environmental factors of plantation forest in the agro-pastoral ecotone of Northern China

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Distribution pattern of soil physical and chemical properties of plantation forest in northern agro-pastoral ecotone

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