关键词: 吉林省, 生态区, 区域差异, 土壤有效硫, 土壤类型

Abstract: 【Objective】 To clarify the status of effective sulfur content of dryland soils in Jilin Province and its distribution differences, to provide a basis for reasonable sulfur application to regional crops.【Method】232 surface (0-20 cm) soil samples were collected from 8 major soil types in different ecological zones of Jilin Province, and the spatial distribution characteristics of effective sulfur content were analyzed by geostatistical methods to compare the differences in effective sulfur content of different types of soils and to establish the correlation between effective sulfur and organic matter and total nitrogen in soils.【Result】 The distribution of effective sulfur content in dryland soils of Jilin Province ranged from 5.8 to 40.7 mg·kg^-1, with a mean value of 18.06 mg·kg^-1. The proportions of sulfur deficiency and potential sulfur deficiency in all samples were 27.2% and 20.7%, respectively. Spatial distribution showed that the overall trend of effective soil sulfur content gradually decreased from east to west, and the corresponding incidence of sulfur deficiency gradually increased from east to west. The mean values of soil effective sulfur content (incidence of sulfur deficiency or potential sulfur deficiency) in the three major ecological zones of east, central and west were 22.3 mg·kg^-1 (24.2%), 18.1 mg·kg^-1 (40%) and 14.3 mg·kg^-1 (75.6%), respectively. The mean values of effective sulfur content of albic soil and dark brown loam, which were mainly distributed in Eastern humid mountainous area, were 22.1 and 22.0 mg·kg^-1, respectively, and 15.2% and 28.3% of the samples were sulfur deficient or potentially sulfur deficient, respectively; the mean values of effective sulfur content of black soil, alluvial soil and meadow soil in the central semi-humid plain area were 18.8 mg·kg^-1, 17.1 mg·kg^-1 and 16.2 mg·kg^-1. The mean values of effective sulfur content of chernozem, aeolian sandy soil and saline-alkali soil in the western semi-arid plain area were 11.9 mg·kg^-1, 14.0 mg·kg^-1 and 13.9 mg·kg^-1, respectively, with higher risk of sulfur deficiency or potential sulfur deficiency, accounting for 73.6%, 73.3% and 75.5% of the samples, respectively. 73.3% and 75.5%, respectively. The regression analysis results showed that the effective sulfur in dryland soils of Jilin Province was significantly logarithmically correlated with soil total nitrogen and soil organic matter, and the effective sulfur content of soil increased with the increase of soil organic matter and soil total nitrogen content. 【Conclusion】 The effective sulfur content of dryland soils in Jilin Province varies significantly among regions and soil types, and deficiency is more common, especially in aeolian sandy soil, saline-alkali soil and chernozem in the central and western regions, where the risk of sulfur deficiency is higher, and sulfur supplementation should be emphasized in soil fertilization and crop management.

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text-align:justify,  ')">">  , Jilin Province, ecological zones, regional differences, soil available sulfur, soil types