罗平县烟区土壤中量营养元素状况分析

Analysis of medium nutrient in soil in Luoping tobacco growing area

为烤烟配方施肥和优质烟叶生产提供指导,于2015年测定了罗平县210个植烟土壤样品有效钙、有效镁和有效硫含量,评价了丰缺状况和空间分布特征.结果表明:①烟区土壤有效钙分布在672.73~8837.64 mg/kg,平均为2365.32 mg/kg,不同乡镇、海拔段、土壤类型有效钙均比较丰富;②烟区土壤有效镁分布在74.27~2365.31 mg/kg,平均为370.30 mg/kg,总体呈现从西北到东南升高的趋势,不同乡镇、海拔段、土壤类型有效镁均比较适宜;③烟区土壤有效硫分布在1.97~228.37 mg/kg,平均为25.36 mg/kg,随海拔降低有效硫呈降低趋势,并表现为南部和北部低、东西部高、中部居中的特点,不同乡镇、海拔段、土壤类型有效硫均偏高;④综合分析认为,罗平县烟区土壤有效钙和有效镁适宜,有效硫偏高.

The content of available calcium, available magnesium and available sulfur in 210 soil samples of tobacco-planting area in luoping are surveyed in 2015 to evaluate the abundance and deficiency status, spatial distribution characteristics. The results indicate that:①The distribution range of available calcium is 672.73~8 837.64 mg/kg, and its average is 2 365.32 mg/kg, the available calcium is relatively abundant in different towns, elevation sections and soil types;②The distribution range of available magnesium is 74.27~2 365.31 mg/kg, and its average is 370.30 mg/kg, the available magnesium generally increased from northwest to southeast, and the available magnesium is suitable in different towns, elevation sections and soil types;③The distribution range of available sulfur is 1.97~228.37 mg/kg, and its average is 25.36 mg/kg, the effective sulfur decreases with the decrease of altitude, which shows that the characteristics in the south and north is lower than that in the east and west, and that in the central region is middle, and the effective sulfur content is high in different towns, elevation sections and soil types;④In summary, the available calcium and magnesium are suitable and the available sulfur is higher.