Investigation and Evaluation of Soil Fertility Under Different Land Use Patterns:A Case Study of Changsha City
In this study,we investigated the land use patterns and soil fertility levels of vegetable gardens,orchards,and tea gardens in Changsha City,China.The following results were obtained.(1)Soil pH showed the lowest coefficient of variation,indicating low variability;soils in vegetable gardens showed the highest coefficient of variation in available phosphorus,suggesting high variability.(2)Soil pH of the three land use patterns was primarily classified as Grade 2 and Grade 3;the soils of arable lands generally exhibited acidic pH values,indicating soil acidification.(3)Soil organic matter,total nitrogen,available nitrogen,and available phosphorus were at adequate levels,while fixed potassium was generally low.Soil nutrients were highest in vegetable gardens,followed by orchards,with tea gardens having the lowest nutrient content,mainly due to different management practices and fertilization conditions.Overall,soil acidification remains a concern within the study area,necessitating further pH adjustments.Given the variations in soil nutrient content across different land use patterns,it is recommended to maintain current levels of nitrogen and phosphorus fertilization and increase potassium fertilizer applications.
land-use patternsoil fertilitysoil nutrientChangsha City
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