云南烟区土壤钾素含量与分布*

 对云南烟区683个土样钾素含量进行了分析。结果表明:云南省植烟土壤速效钾含量平均为222.8mg/kg,全钾含量平均为10.06g/kg。从不同烟区来看,土壤速效钾含量状况排序为:滇东烤烟区＞滇中烤烟区＞滇东北烤烟区＞滇西烤烟区＞滇东南烤烟区＞滇西南烤烟区;全钾含量排序为:滇东北烤烟区＞滇中烤烟区＞滇东南烤烟区＞滇西烤烟区＞滇东烤烟区＞滇西南烤烟区。从主要植烟土壤类型看,速效钾含量排序为:红壤＞黄壤＞紫色土＞水稻土;全钾含量排序为:黄壤＞紫色土＞水稻土＞红壤。根据云南烟区土壤钾素含量及分布特点,提出了相应的施肥措施。

Content and Distribution of Potassium in Soils of Yunnan Tobacco Growing Areas

The potassium content of 683 soil samples that collected from tobacco growing areas in Yunnan Province was analyzed. The results showed that the average content of available K and total K were 222.8mg/kg and 10.06g/kg respectively. The tobacco growing areas in order of contents of available K were East Yunnan＞Center Yunnan＞North East Yunnan＞West Yunnan＞South-East Yunnan ＞ South-West Yunnan and in order of total K were North-East Yunnan＞ Center Yunnan＞South-East Yunnan ＞West Yunnan＞East Yunnan＞ South-West Yunnan. The major types of tobacco soils in order of content of available K were red clay＞yellow soil＞purple soil＞Paddy soil and in order of total K were yellow soil＞purple soil＞Paddy soil＞red clay. The suitable fertilization formula was recommended based on the characteristics of potassium content and distribution of soil in Yunnan tobacco growing areas.