Risk Assessment and Countermeasures of Magnesium Deficiency in Tobacco-growing Soil in Bijie City
In order to evaluate the risk status of magnesium deficiency in tobacco-planting soil in Bijie City,Guizhou Province and take corresponding improvement measures,soil samples of topsoil in the tobacco-planting areas of Bijie City,Guizhou Province were collected.Soil pH value and exchangeable potassium,calcium and magnesium contents were detected,and the spatial distribution law was analyzed.The potential risk of magnesium deficiency in tobacco-planting soil was evaluated by the application system of prevention and control measures for magnesium deficiency in tobacco-planting soil.The risk factors that may lead to magnesium deficiency were analyzed,and the production improvement measures were put forward.The results showed that the pH value of tobacco-planting soil in Bijie City was generally acidic,and the contents of exchangeable potassium,calcium and magnesium were abundant or relatively abundant.However,after risk assessment,it was found that one quarter of the soil in Bijie City had a high or extremely high risk of magnesium deficiency,30.3%of the sample sites needed to improve soil pH value,22.4%of the sample sites needed to use leaf spraying magnesium fertilizer.This study has important practical significance to prevent the risk of magnesium deficiency in Bijie tobacco-growing area,and can also provide theoretical and practical reference for the coordination of medium elements in other tobacco-growing areas.
万方数据
维普
