Effects of Dolomite Powder and Magnesium Oxide Fertilizer on Calcium and Magnesium Nutrient Elements in Tobacco Planting Soil and Tobacco Leaves
The purpose of the research is to study the effect of dolomite powder and magnesium oxide fertilizer on the exchangeable calcium and magnesium content of tobacco growing soils,as well as the calcium,magnesium and other nutrient content of tobacco,so as to improve and scientifically validate tobacco fertilization methods.In the typical area of low exchangeable calcium and magnesium range of tobacco soils,different amounts of dolomite powder and magnesium oxide fertilizer were applied in a randomized block design.During the field plot test,the exchangeable magnesium and available nitrogen,phosphorus and potassium levels in the soil,as well as the calcium,magnesium,nitrogen,phosphorus and potassium levels in tobacco leaves,were measured at different growth stages.Additionally,the agronomic traits of maximum leaf length,maximum leaf width,plant height,stem circumference and pitch were observed.The results showed that the exchangeable magnesium content of the soil increased significantly with the application of 3000 kg/hm2 of dolomite powder during the 48 and 68 days of growth and after the tobacco harvest,compared to other treatments.Exchangeable calcium content in soil showed a significant increase after the tobacco harvest in comparison to other treatments.Upper and middle tobacco leaves had higher magnesium levels,and the upper tobacco leaves had higher calcium levels after the harvest than that in other treatments.In the field of tobacco soils with low levels of exchangeable calcium and magnesium,the application of 3000 kg/hm2 of dolomite powder had the potential to increase the levels of exchangeable calcium and magnesium in the soil and to increase the levels of magnesium and calcium in the tobacco leaves.The results could be used as a valuable reference for the optimization of fertilization practices.
tobacco-planting soilcalciummagnesiumnutrient elements of tobacco leaves
万方数据
维普
