河南主要植烟土壤养分状况与施肥对策

在河南省不同生态类型区典型地块采集大量土壤和烟叶样品进行分析化验 ,结果表明 :河南省主要植烟土壤的 pH介于中性—微碱性范围 ,有机质和有效氮含量中等偏高 ,大部分土壤有效磷含量偏低 ,有效钾含量较高 ;中量元素钙含量过高 ,最高含量达 4 0 66mg/kg,钾钙关系失调 ;微量元素中锌较缺乏 .烟叶品质突出表现为钾素中等偏低 ,氯离子含量偏高 .为此提出该区烟草施肥中应掌握“稳氮、增磷、补钾、控钙、降氯、配微”的施肥对策

The nutrient regimes in soils growing tobacco in Henan and Fer tilization Methods

From vast sampling and analysis of soils and tobacco leaves grown in different ecological regions of Henan province, it can be seen that the pH of the soils ranges from neutral to weak alkaline. The organic matter and available N are medium and high, while the available P is low in most soils. Though the available K is abundant, K absorbed by tobacco is low due to the extremely high content of calcium in soils. Also, zinc is poor in most soils. The major problem in terms of tobacco quality is related to the low potassium and high chloride contents. This paper put forward the fertilization plan of stabilizing nitrogen, regulating phosphorus, increasing potassium, controlling calcium, reducing chloride and coordinating micro-nutrients in tobacco production.