Soil Selenium Characteristics and Availability in Jujube Orchard in Minqin County of Gansu Province
Journal Title: Bulletin of Soil and Water Conservation - Year 2023, Vol 43, Issue 3
Abstract
[Objective] The distribution status and availability of soil selenium in three jujube orchards in Minqin County, Gansu Province was analyzed in order to provide a theoretical basis for the development of the selenium-enriched jujube industry. [Methods] The contents of total selenium and various forms of selenium in the 0—60 cm soil layer in three jujube orchards of Minqin County were measured by a method of successive extraction. Jujube distribution characteristics and availability were determined. [Results] ① The total selenium content was 24—520 μg/kg (average was 210.625 μg/kg), suggesting that total soil selenium was not deficient. ② Total soil selenium content increasingly declined with increasing soil depth in the 0—60 cm soil layer, with values in the three orchards following the order of Liugou>Zhangba>Xinguoyuan. According to the partition criterion for soil selenium content, the surface soil (0—20 cm) was categorized as selenium-rich; the subsurface soil (20—40 cm) was selenium-rich and selenium-poor; and the bottom soil layer (40—60 cm) was selenium-rich, selenium-poor, and selenium-deficient. ③ The available selenium content was 42.5 μg/kg and accounted for 20.2% of total selenium. Soluble selenium was 1.1—1.4 μg/kg, exchangeable selenium was 1.4—2.8 μg/kg. Both of these selenium forms together accounted for only 7.7% of the available selenium. The remaining available selenium was all organic selenium. ④ The available soil selenium increased with increasing number of reclamation years and followed the order of Xinguoyuan>Liugou>Zhangba among the three orchards. ⑤ The contents of total selenium, available selenium, and ineffective selenium were greater under trees than between tree rows. [Conclusion] Total selenium was not deficient in the soil of jujube orchards of Minqin County, but available selenium was deficient. Hence, development of the selenium-enriched jujube industry will require artificially supplementing soils with selenium fertilizer.
Authors and Affiliations
Youjun Liu, Zizhu Yan, Ze Yao, Tianfu Zou
Keywords
Related Articles
- EP ID EP762558
- DOI 10.13961/j.cnki.stbctb.20230421.001
- Views 11
- Downloads 0
Flume-based Experimental Study on Wave Prevention and Sand Fixation Functions of Sand Barriers Applied to Coral Sandy Coastlines
[Objective] The flume simulation research on wave prevention and sand stabilization counter measures for coral sandy coastlines were studied in order to provide a theoretical basis for the project to protect coastlines a...
Interaction Between Intensive Land Use and New-type Urbanization from Perspective of Spatiotemporal Cone
[Objective] The interaction mechanism between intensive land use and new-type urbanization was determined in order to provide a reference for regional high quality development. [Methods] We qualitatively analyzed the int...
Coupled Coordination of Land and Water Use Efficiency in Huaihe River Basin and Its Spatial and Temporal Divergence
[Objective] The utilization efficiency of land and water resources in the Huaihe River basin was evaluated to clarify the degree of coupling and coordination between the two and their spatial differentiation characterist...
Spatial and Temporal Evolution and Drivers of Habitat Quality of Urban Agglomeration in Lower Yellow River Basin
[Objective] The habitat quality of the urban agglomeration in the lower reaches of the Yellow River, and the relevant influencing factors were studied in order to provide a reference for ecological protection and quality...
Dynamic Simulation of Land Use Changes and Assessment of Carbon Storage in Kunming City Based on PLUS and InVEST Models
[Objective] Changes in land use and carbon stocks under different scenarios were evaluated to provide a scientific basis for optimizing ecological services and sustainable development. [Methods] Changes in land use and c...