罗平烟区植烟土壤pH值与有机质状况分析

Analysis of pH Value and Organic Matter in Soil in Luoping Tobacco Growing Area

采用数理统计与GIS技术结合的分析方法,对曲靖罗平烟区12个植烟乡镇基本烟田,共计210个不同类型土壤样本的p H值与有机质含量的空间分布特征进行分析。结果表明:(1)罗平县植烟土壤p H值分布范围在4.61~8.06,平均为6.58,从p H值空间分布来看,总体呈现出从西北到东南逐渐升高的趋势;(2)罗平县不同海拔的植烟土壤p H值均在适宜范围,随着海拔的升高,p H值呈下降趋势;(3)罗平县不同类型土壤以紫色土p H值最低,与其他土壤类型达到极显著水平;(4)罗平县植烟土壤有机质含量范围在4.20~164.13 mg/kg,平均为43.10 mg/kg,罗平各乡镇植烟土壤有机质平均含量均在30 g/kg以上,从有机质含量空间分布来看,大体上呈现西北高于东南的趋势;(5)随着海拔的升高,土壤有机质呈上升趋势,各海拔植烟土壤有机质均在30 g/kg以上;(6)各类型植烟土壤有机质含量均在30 g/kg以上,有机质最高的新积土含量为53.04 g/kg,较低的是水稻土(34.97 g/kg)和黄壤(39.36 g/kg)。

By means of mathematical statistics and GIS technology, the spatial distribution characteristics of 210 different types of soil p H values and organic matter content in 12 basic tobacco plants in tobacco growing towns in Luoping, Qujing were analyzed. The results showed that：（1） the distribution range of p H value of tobacco planting soil in Luoping County was 4.61-8.06, the average was 6.58. From the spatial distribution of p H value, the trend of increasing gradually from the northwest to the southeast;（2） the p H values of tobacco growing soils at different altitudes in Luoping county were in the suitable range, and the p H value decreased with the increase of altitude;（3） in Luoping County, the p H value of purple soil was lowest in different types of soil, and reached a very significant level with other soil types;（4） the soil organic matter content of tobacco planting soil in Luoping county was 4.20-164.13 mg/kg, the average was 43.10 mg/kg, the average soil organic matter content of tobacco growing villages in Luoping was above 30 g/kg, and the trend of the northwest was higher than the southeast in the view of the spatial distribution of organic matter content;（5） as elevation rises, soil organic matter showed an upward trend, and organic matter in tobacco growing soil was above 30 g/kg at all altitudes;（6） the organic matter content of each type of soil planting soil was above 30 g/kg, the highest content of organic matter of alluvial soils was 53.04 g/kg, and the lower was paddy soil（34.97 g/kg） and yellow soil（39.36 g/kg）.