基于大理烟区土壤养分分布状况的烤烟前作适宜性评价OACSTPCD

To understand the suitability of different preceding crops for flue-cured tobacco production in Dali tobacco planting areas,the soil samples of wheat,barley,broad bean,rape,pea,garlic and winter fallow for five years were collected from 12 tobacco planting areas in Dali,and the soil nutrient content was determined.The membership of each nutrient index was calculated by fuzzy mathematics,and the membership of soil nutrient was used to comprehensively evaluate the suitability of preceding crop for flue-cured tobacco planting in Dali.The results showed that distribution proportion and membership degree of alkali hydrolyzed nitrogen and water-soluble chlorine content in soil suitable for tobacco growth after planting wheat were high,while the distribution proportion and membership degree of available phosphorus and available potassium content were medium.The distribution proportion and membership degree of soil alkali hydrolyzed nitrogen,available potassium,and water-soluble chlorine content suitable for tobacco growth after winter fallow were high,while the distribution proportion and membership degree of available phosphorus content were medium.The most suitable rotation mode is flue-cured tobacco and wheat and winter fallow in the Dali tobacco planting areas.