龙山植烟土壤有机质分布特征及其与主要养分的关系

为了探明龙山植烟土壤有机质分布及其对主要养分的影响,2014年对龙山县300个土壤样品有机质含量及土壤主要有效养分含量进行检测。结果表明:龙山植烟土壤有机质平均为27.15 g/kg,仍有39.00%的植烟土壤有机质含量偏低;龙山不同母质植烟土壤有机质含量由高到低依次为:洪积物(38.33 g/kg)残积物(27.71 g/kg)坡积物(26.96 g/kg);龙山植烟土壤有机质含量随海拔升高有机质呈先上升后趋于稳定的趋势,海拔837 m是土壤有机质含量的重要拐点;植烟土壤主要养分与有机质含量均呈极显著正相关关系,土壤有机质对主要养分含量的影响在23.00和29.00 g/kg附近有2个极显著的拐点。

Distribution Characteristics of Soil Organic Matter and It's Relationship with Major Nutrients in the Tobacco Growing Soils of Longshan

In order to study the Longshan tobacco soil organic matter distribution and its influence on the main nutrient of Longshan County, the effects of soil organic matter content and soil available nutrient contents in 300 soil samples in 2014 were studied. The results showed that the soil organic matter content was 27.15 g/kg, and the organic matter content of 39% tobacco planting soil was still low; the Longshan different parent tobacco soil organic matter content from high to low: Proluvium (38.33 g/kg) >deluvium (27.71 g/kg) >eluvium (26.96 g/kg); the soil organic matter content of the Longshan tobacco planting soil increased with altitude rose, increased first and then tended to be stable. The altitude 837 m was an important turning point of soil organic matter content; there was a significant positive correlation between main soil nutrients and organic matter content in tobacco growing soils, and there were 2 significant turning points around 23.00 and 29.00 g/kg showed the effects of soil organic matter on the main nutrient content.