南平植烟土壤Ca、Mg、S养分状况与演变趋势

Study on the Status and Evolution Tendency of Exchangeable Calcium,Magnesium and Available Sulphur in Nanping Tobacco-growing Soil

[目的]分析南平市植烟土壤Ca、Mg、S养分状况及演变趋势。[方法]利用南平植烟土壤普查资料,分析其土壤Ca、Mg、S养分状况与演变趋势。[结果]南平植烟土壤Ca、Mg、S平均含量分别为(531.69±222.83)、(80.09±36.17)、(35.30±24.03)mg/kg;土壤供Ca和供Mg变异较小,供S变异较大。2008年土壤供Ca、Mg能力均表现为老烟区>定点区>全市烟区,而供S表现为老烟区>全市烟区>定点区;土壤交换性Ca、Mg和有效S含量均呈升高趋势,供Ca和供Mg能力的增幅全市烟区最高,供Mg能力的增幅则为长期连续种烟的老烟区更加突出。[结论]总体来说南平地区2008年的土壤样本Ca、Mg、S元素并不缺乏,但是地区上的差异依然存在,因此在坚持施用钙镁磷或白云石粉以及硫酸钾的同时,更应该注意减小地区的差异,以减少对生产优质烟叶的不利影响。

[Objective]To analyze the conditions and variations of calcium,magnesium and sulphur in the soil planting tobacco in Nanping City.[Method]The status and variations of soil calcium,magnesium and sulphur were analyzed based on the data of the soil survey of Nanping tobacco-planting area.[Result]The average content of exchangeable calcium,magnesium and available sulphur in Nanping tobacco-growing soil were（531.69±222.83）,（80.09±36.17）and（35.30±24.03） mg/kg respectively.The variations of the soil calcium and magnesium were great,while the variation of sulphur was small.In 2008,both the contents of soil calcium and magnesium showed that the old tabacco areathe fixed point tabacco areathe whole city＇s tabacco area,and the content of soil sulphur showed that the old tabacco areathe whole city＇s tabacco areathe fixed point tabacco area.The contents of soil calcium magnesium and sulphur all showed a higher tendency in recent years,and the ability of soil calcuim and sulphur supply had the highest increase amplitude for the whole city＇s tabacco areas,but the ability of soil magnesium supply especially for the old tobacco-growing areas which was long-term continuous tobacco-planting had a higher tendency.[Conclusion]The soil of Nanping tobacco-planting area didn＇t lack calcium,magnesium and sulphur in 2008,but the regional difference still existed.Therefore,applying calcium magnesium phosphate,potassium sulphate and dolomite powder,and lowing the regional differnce in order to reduce the adverse effect of the cultivation of high quality tabacco leaves were necessary.