【摘要】 对比宜昌烟区2003与2016年植烟土壤养分,分析4个县植烟土壤养分主要化学指标的变化趋势。结果表明,土壤pH有升有降,五峰、长阳土壤酸化趋势明显,兴山碱化趋势明显。植烟土壤有机质除秭归外,其他3县均增加。碱解氮含量有升有降,晾烟区增加,烤烟区下降。速效磷含量全部大幅提高。速效钾含量升高,尤其是兴山增加幅度最高。更多还原

【Abstract】 The nutrient contents of tobacco-planting soil in Yichang City were compared between 2003 and 2016,the evolution tendency of the fertility was analyzed.The results showed that the pH of soil increased and decreased,the acidification of Wufeng and Changyang was obvious,whereas the alkaliation of Xingshan was obvious.In addition to Zigui,the contents of organic matter increased in three other counties.The content of nitrogen in air-cured tobacco area increased,and flue-cured tobacco area decreased.The content of available phosphorus increased greatly in all of counties.The content of available potassium increased,especially Xingshan.更多还原