【摘要】 分析了湖北烟区烤烟种植的气候因素和土壤养分含量状况。结果表明:(1)湖北烟区烤烟大田生长期气温较适宜,降雨充沛,温热条件能够满足烤烟生长发育的需求,并具有无霜期长、≥10℃积温高、日均温≥20℃持续天数多的特点,但降雨量分布存在较大的时空变异。(2)土壤物理性状较为理想,具有较强的保肥能力,pH值较适宜,有机质含量丰富,土壤氮素、磷素和钾素含量较能满足烟株需求;钙镁比值不平衡,有效硫含量较高;大多数微量元素含量丰富,但有效硼和水溶性氯含量不足。(3)分别基于气候因素和土壤因素指标,采用聚类分析法将湖北植烟县(市)分为3个片区,对各片区的气候和土壤因素进行了描述。更多还原

【Abstract】 The status of the climate factors and soil nutrients of Hubei flue-cured tobacco growing regions were analyzed.The results indicated that:(1) Hubei tobacco growing regions had reasonable temperature and abundant precipitation during field periods.Sunlight hours were sufficence for the growth and development for flue-cured tobacco.In addition,it had a long frost free period,high accumulated temperature of ≥10℃,a long period of time with daily average temperature of ≥20℃.But there existed large space time variation for distribution of precipitation.(2) The soil had good physical characteristics,strong capability of storing nutrients and suitable pH value.The content of organic matter was rich and the contents of N,P and K could meet the requirements of tobacco growth and development.The ratio of exchangeable Ca to Mg was unbalanced,and available S was rich.The contents of most microelements were rich also,but available B and water soluble Cl were lacking.(3) Based on the indexes of climate factors and soil factors respectively,Hubei tobacco growing areas could be classified into three groups by cluster analysis.The traits of climate factors and soil factors for different groups were described briefly.更多还原