靖西市植烟区土壤交换性钙、镁含量特征及与土壤酸碱的相关性分析

Characteristics of Exchangeable Calcium and Magnesium Content in Soil and Its Correlation with Soil Acidity and Alkalinity in Tobacco Planting Areas of Jingxi City

为了明确靖西市植烟区土壤交换性钙、镁含量及其比值的特征,阐明其与土壤酸碱的相关性,以靖西市主要植烟区土壤为研究对象,2022年6月采集植烟区具有代表性的土壤,测定土壤交换性钙、镁含量及计算其钙镁比值,并分析其与土壤酸碱的相关性。结果表明,靖西市主要植烟区土壤交换性钙、镁含量丰富,平均值分别为5 114.59、268.57 mg/kg,土壤交换性钙镁比值大于10,占71.01%。钙镁比值表现为强变异,且交换性钙的变异性大于交换性镁。植烟区土壤pH普遍偏高,pH与土壤交换性钙含量呈极显著正相关,与交换镁含量呈显著负相关,pH对交换性钙含量的影响大于交换性镁,植烟土壤为微碱性时,交换性钙含量处于高及以上水平的占比达100%。综上所述,靖西市主要植烟区土壤交换性钙、镁含量总体处于偏高水平,钙镁比变异强度大,易出现钙、镁平衡失调。因此,今后在生产中需注意酸碱性钙镁肥料的使用以调节土壤酸碱性,并适时培肥土壤,调节土壤钙、镁平衡,提高烤烟产量及品质。

In order to clarify the characteristics of exchangeable calcium and magnesium content and its ratio in the soil of tobacco planting areas in Jingxi City,clarify the correlation between exchangeable calcium and magnesium content with soil acidity and alkalinity,the representative soil of tobacco planting areas in Jingxi City was collected in June 2022,and the exchangeable calcium and magnesium content in the soil were measured and their ratio was calculated,and the correlation between exchangeable calcium and magnesium content and soil acidity and alkalinity was analyzed.The results showed that the content of exchangeable calcium and magnesium in the soil of the main tobacco planting areas in Jingxi City was rich,with the average values of 5114.59 and 268.57 mg/kg,respectively.The ratio of exchangeable calcium and magnesium in the soil was more than 10,accounting for 71.01%.The calcium magnesium ratio shows strong variability,and the variability of exchangeable calcium is greater than that of exchangeable magnesium.The calcium magnesium ratio shows strong variability,and the variability of exchangeable calcium is greater than that of exchangeable magnesium.The soil pH in tobacco planting areas is generally high.The pH and soil exchangeable calcium content are highly significant positive correlation,while the pH and exchangeable magnesium content are significantly negative correlation.The effect of pH on exchangeable calcium content is greater than exchangeable magnesium content.When the tobacco planting soil is slightly alkaline,the exchangeable calcium content is at a high or higher level,accounting for 100%.To sum up,the exchangeable calcium and magnesium content in the soil of the main tobacco planting areas in Jingxi City is generally at a high level,with a large variation intensity of calcium and magnesium ratio,which is prone to imbalance of calcium and magnesium balance.In production,attention should be paid to the use of acid and alkaline calcium and magnesium fertilizers to adjust the soil acidity,and timely fertilize the soil,adjust the soil calcium and magnesium balance,and improve the yield and quality of flue-cured tobacco.