南平植烟土壤质地状况及其与土壤养分的关系

[目的]为指导烟区土壤保育和烤烟平衡施肥提供参考依据。[方法]利用南平植烟土壤普查资料,分析了土壤质地现状、演变趋势及其与土壤养分的关系。[结果]0.01 mm黏粒平均含量42.15%±7.14%,CV为16.94%,其中轻壤土和中壤土占65.65%,重壤土占33.51%。土壤质地与全钾含量之间呈0.01水平显著负相关,与缓效钾含量之间呈0.05水平显著正相关,与有机质、全氮、全磷、碱解氮、速效钾、交换性钙和镁及有效硫、有效铁、有效锰、有效铜、有效锌、有效硼含量之间呈0.01水平显著正相关,且与土壤有效锰、有效硫、有效铜含量的关系最为密切。土壤质地分组后,其养分含量在组间存在显著或极显著差异。[结论]南平植烟土壤质地多数较为适中,耕性较好;但近10年来土壤0.01 mm黏粒含量呈增加趋势,对质地黏重的土壤应客砂改土。

Study on Status of Soil Texture and Its Relationship with Soil Nutrient in Nanping Tobacco-Growing Area

[Objective]The research aimed to provide the basis for soil conservation and balanced fertilizer in Nanping tobacco-growing area.[Method] The status and evolution tendency of soil texture,and its relationship with soil nutrient were analyzed using the survey data of Nanping tobacco-growing soil.[Result] The average content of soil clay (<0.01 mm) was 42.15%±7.14%,CV was 16.94%,among which light and mid loam and heavy loam accounted for 65.65% and 33.51%.The soil texture had extremely significant negative correlation with total potassium,significant positive correlation with slowly available potassium,and extremely significant positive correlation with organic matter,total nitrogen,total phosphorus,alkaline hydrolytic nitrogen,available potassium,exchangeable calcium and magnesium,available sulfur,available iron,available manganese,available copper,available znic and boron.And its relationship with the contents of soil available manganese,sulfur and copper were close.The soil nutrient contents among different texture groups had significant or extremely significant differences.[Conclusion] Most of soil texture in Nanping tobacco-growing area was moderate and its tilth was good.The content of soil clay(<0.01 mm) showed a higher tendency for last 10 years.The appropriate addition of sand into the heavy texture soil could improve the soil texture.