云南植烟土壤磷素肥力状况

Soil fertility status on phosphate of tobacco growing soil in Yunnan Province

对云南烟区植烟土壤683个土样磷素含量进行分析,结果表明,云南烟区大多数植烟土壤全磷和速效磷含量都较低,且分布不均.速效磷含量平均为25.05 mg/kg,全磷含量平均为0.95 g/kg.不同烟区土壤速效磷含量大小依次为:滇中烤烟区、滇东烤烟区、滇西烤烟区、滇东南烤烟区、滇西南烤烟区、滇东北烤烟区;全磷含量大小依次为:滇东烤烟区、滇中烤烟区、滇东南烤烟区、滇西烤烟区、滇西南烤烟区、滇东北烤烟区.不同植烟土壤速效磷含量大小依次为:红壤、水稻土、紫色土、黄壤;全磷含量大小依次为:红壤、水稻土、黄壤、紫色土.

The phosphate content of 683 soil samples collected from tobacco growing areas in Yunnan Province was analyzed. The results showed that total phosphorus content and available phosphorus content were deficient in most of tobacco growing soil with uneven distribution. The average available and total phosphorus content were 25.05 mg/kg and 0.95 g/kg respectively. The phosphorus content available in tobacco growing areas in Yunnan ranged from Center to East to West to South-East to South-West and then North-East; and the total phosphorus content ranged from Center to East to South-East to West to South-West to North-East. For the major types of tobacco growing soil, the phosphorus content available, ranged from red clay to paddy soil to purple soil to yellow soil, and the total phosphorus contents, ranged from： red clay to paddy soil to yellow soil to purple soil. The suitable fertilization formulae for different tobacco growing areas were recommended based on the characteristics of soil phosphorus contents and distribution.