十堰植烟土壤有效态微量元素分布特征及评价

目的]研究十堰市植烟土壤有效态微量元素现状,分析其丰缺程度,以期为全市烟区烟草平衡施肥方案的制订及烟叶品质的改善提供理论依据。方法]以十堰烟区植烟土壤为研究对象,对房县、竹山、竹溪和郧西4个植烟土壤有效态微量元素含量及分布进行分析。结果]十堰烟区植烟土壤中有效铜、有效铁含量丰富,有效锌含量整体处于中等偏低水平,有效硼、有效钼、水溶性氯含量大部分处于缺乏或者潜在缺乏水平;十堰烟区有效态微量元素含量分布存在明显的地域差异,其中,郧西产区有效钼、有效硼、水溶性氯、有效锌含量偏低,竹山产区有效钼、有效锌、有效硼含量偏低,竹溪产区水溶性氯含量偏低,房县产区有效硼、水溶性氯含量偏低。结论]在生产中,十堰烟区应适当补充含硼、含钼、含氯等微量元素肥料,其中,郧西产区应补充硼肥和钼肥,竹溪产区应补充氯肥,竹山产区应补充锌肥和硼肥。

Distribution Characteristics and Evalution on Soil Available Micronutrients in Shiyan

Objective] To study microelement present situation of planting tobacco soil in Shiyan and analyze the level of abundance and deficiency in order to provide evidence for formulating balanced fertilization scheme and improving the quality of tobacco leaves.Method]The content and distribution of soil available micronutrients from tobacco-growing areas in Shiyan were studied and evaluated.Result]The content of available Zn was low,the content of available Cu and Fe were the richest.However,the content of effective B, effective Mo,effective Zn and water soluble Cl were the lowest.The distribution of soil available micronutrient contents varied in Shiyan.The content of effective Mo,effective B and water soluble Cl were the lowest in soils from Yunxi;The content of effective Mo,effective Zn and effective B was the lowest in Zhushan area;The content of water soluble Cl was the lowest in Zhuxi area;The content of effective B and water soluble Cl were the lowest in Fangxian area.Conclusion]B and Mo fertilizers should be applied more to tobacco-growing areas of Yunxi.Cl fertilizers should be increased in Zhuxi.Zn and B fertilizer should be increased in Zhushan.