巴东县茶店子基地单元植烟土壤中有效态微量元素的分布特征及评价

Distribution and Evaluation of Soil Microelements in Chadianzi Tobacco-growing Areas of Badong

[目的]研究茶店子基地单元植烟土壤微量元素的含量以及分布状况。[方法]采集64份有代表性的土壤样本进行测定、分析,并按照肥力评价标准进行分类。[结果]土壤速效硼含量全部分布在极低—低,速效锌、速效锰含量处于低—中等,速效铜含量主要分布在中—高等,速效铁含量主要处于高—极高。海拔与土壤速效铁呈极显著正相关,土壤pH与土壤速效铜呈显著负相关,与速效铁、速效锰呈极显著负相关。速效锌与速效铜、速效铁与速效锰呈极显著正相关,速效铜与速效铁、速效锰呈显著正相关。[结论]针对茶店子烟区硼、锌含量少,铁含量过高的现状,建议在生产上普遍补充硼,局部补充锌、锰,严格控制铁,同时,针对不同植烟土壤养分状况,采用不同的烤烟专用复合肥配方。

[Objective]To research the contents and distribution of available microelements in Chadianzi Tobacco-growing areas.[Method]The contents of available microelements in 64 soil samples of different soil types were studied.[Result]The contents of available B were all in extremely low-low range and B were serious deficiency,available Zn,available Mn were in low-medium range,available Cu were mainly in mediumrich range and available Fe were mainly in rich-extremely rich range.It was found that the altitude and the available Fe had a significant positive correlation.The pH had significant negative correlation with available Cu,and a significant negative correlation with available Fe and Mn.There was a significant positive correlation between the content of available Zn and available Cu,Fe and Mn.The content of available Cu was significantly positive correlated with available Fe and Mn.[Conclusion]In production,the main means to resolve B deficiency is to widely increase the rate of B fertilizer.It was recommended that the use of Zn fertilizer should be increased while the iron fertilizer should be strictly controlled for the regional.It was suggested that adopt different flue-cured tobacco special-purpose compound fertilizer according to the nutrient status of tobacco soil.