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    湖南郴州烟区土壤养分状况分析

    Soil Nutrient Status in Chenzhou Tobacco Planting Areas

    • 摘要: 对郴州主产烟县(区)734 个土壤样品养分进行了分析。结果表明,郴州烟区土壤略偏碱;有机质总体上较丰富,平均为42.30 g/kg,高于湖南省平均值;土壤全氮和碱解氮含量较高;全磷含量平均为0.93 g/kg,速效磷在土壤中的分布极不均衡,适宜范围10~20 mg/kg 的土壤样品只占20.84%;土壤全钾及速效钾含量偏低,由南到北,由西到东呈逐渐增加的趋势。烟区土壤普遍缺硼,有91.28%的土壤样品低于缺硼临界值0.30 mg/kg;有效锌含量总体上较高,2~4 mg/kg 丰富含量范围内的土壤样品占52.04%;有效锰含量高于20 mg/kg 以上的样品占37.53%;有效铜总体上含量丰富,高于1 mg/kg 的土壤样品所占比例高达79.57%;有效铁含量平均为87.23 mg/kg,处于极丰富水平。花岗岩发育的红壤含镁量很低,烟株总体上缺镁。

       

      Abstract: We analyzed 734 of soil samples from major tobacco planting counties in Chenzhou. The result indicated that, in Chenzhou tobacco planting regions, soils were slightly alkali, average organic matter content was 42.30 g/kg, which was higher than the average in Hunan province. Soil total N and available N content was relatively high. Soil total P content, on average, was 0.93 g/kg. Soil available P content varied widely, only 20.84% of the samples were in the suitable range (10-20 mg/kg). Soil total K and available K contents were relately low, which increased gradually from south to north and from west to east. Most of tobacco planting areas were B deficiency. Available B content in 91.28% of the soil samples was lower than critical value of 0.30 mg/kg. Available Zn content was relatively high. Available Zn in 52.04% of soil samples was in the suitable range (2-4 mg/kg). Available Mn content in 37.53% of soil samples was higher than 20 mg/kg. Available Cu content in 79.57% of soil samples was higher than 1 mg/kg. Available Fe content, on aveage, was 87.23 mg/kg. Available Mg content in soils from granite was generally low, and tobacco had Mg deficiency.

       

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