秦巴山烟区(十堰)植烟土壤养分状况分析

摘要

[Objective] In order to investigate nutrients in tobacco growing soils in Shiyan,and proposed relative improvement measures.[Meth-od] 1448 soil samples were collected and analyzed from 4 tobacco growing county of Shiyan City.[Result] The average soil pH value was 6.50, the average contents of organic matter was 19.10 g/kg, available N was 114.10 mg/kg, available P was 30.00 mg/kg, available K was 155.40 mg/kg,available Zn was 0.97 mg/kg,available Cl was 6.50 mg/kg ,available B was 0.17 mg/kg,available S was 26.70 mg/kg,availa-ble Ca was 2725.00 mg/kg ,available Mg was 212.70 mg/kg,available Cu was 1.18 mg/kg,available Mn was 28.38 mg/kg,available Fe was 30.18 mg/kg.[Conclusion] The pH value,contents of organic,available N,available Zn,available B and available Mg content were appropriate in tobacco-growing soil of Shiyan.The content of available P,available S,available Ca,available Cu,available Mn and available Fe were higher.The supply of available K was obviously deficient in some tobacco-growing areas.The soil fertility characteristics had greater differences among differ-ent tobacco-growing county.%[目的]查明秦巴山烟区(十堰)植烟土壤养分丰缺状况,并提出改良措施.[方法]选取十堰市4个产烟县1448份土壤检测数据进行分析.[结果]全县植烟土壤平均pH 6.50,有机质19.10 g/kg,碱解氮114.10 mg/kg,速效磷30.00 mg/kg,速效钾155.40 mg/kg,有效锌0.97 mg/kg,氯6.50 mg/kg,有效硼0.17 mg/kg,有效硫26.70 mg/kg,交换性钙2725.00 mg/kg,交换性镁212.70 mg/kg,有效铜1.18 mg/kg,有效锰28.38 mg/kg,有效铁30.18 mg/kg.[结论]全市植烟土壤pH、有机质、碱解氮、有效锌、有效硼、交换性镁均处于适宜范围内,速效磷、有效硫、交换性钙、有效铜、有效锰、有效铁较为丰富,速效钾偏低,不同植烟县土壤肥力特征有较大的差异.