【摘要】 通过对恩施烟区272个土壤样品所进行的测定,评价了植烟土壤养分状况。结果表明,全州90%以上被调查土壤适宜种植烟草,50%的样品有机质含量较为适宜,近35%的样品有机质含量偏高,60%土壤全氮适宜。近60%的土壤碱解氮偏高,77.65%的土壤速效磷含量适中且部分偏高,但仍然有近23%的土壤速效磷含量偏低或缺乏;60%以上被调查土壤平均速效钾含量偏低,且区域间差异较大。土壤普遍缺镁,72.06%的被调查土壤交换性镁含量低于0.4 cmol/kg,变异系数为84.51%;30.51%的被调查土壤缺硼,56.99%的土壤存在缺硼风险;全州范围内大多数土壤有效锌含量适宜,部分偏高,但含量差异大,变异系数高。更多还原

【Abstract】 272 of soil samples were collected from tobacco planting areas in Enshi.Soil pH,organic matter and macroelements were determined.The results indicated that about 90% of the soil pH was suitable for tobacco growth.In term of soil samples,50%,60% and 77.65% of soil organic matter,total N and available phosphorus content were suitable for tobacco growth.35% and 60% of the soil s were found with relatively higher levels of the soil organic matter and available N.Nearly 23% of the soils available phosphorus content were extremely poorer.More than 60% of the soils available potassium content was deficient and quite diversity among different the regions.The contents of organic matter,available N,available phosphorus and available potassium increased with the elevation increased.Exchangeable magnesium contents was in general deficient and 72.6% of the soils were less than 0.4 cmol/kg.About 30.51% of the soils water-soluble B was deficient and 30.51% soils water-soluble B was deficiency.Soil available Zn contents of most soil samples was appropriate,but there have big difference in different sampling points.更多还原