贵州省植烟土壤养分含量状况分析

为了了解贵州省烟区植烟土壤肥力状况,在贵州省9个市(州)13个产烟县65个主要种烟乡镇采集土壤进行理化性状检测。结果表明,贵州省植烟土壤以酸性至中性土壤为主;土壤有机质含量较丰富,20~40 g/kg含量范围内的土壤占72.3%;土壤全氮和碱解氮含量较丰富,其中全氮含量主要在1.0 g/kg以上,碱解氮含量主要在90 mg/kg以上;土壤全磷和有效磷含量较丰富,其中全磷含量主要在0.8 g/kg以上,有效磷含量主要在10 mg/kg以上;土壤全钾含量中等,土壤速效钾含量较丰富,其含量主要在150 mg/kg以上;土壤氯离子含量适中,主要在30 mg/kg以下。因此,贵州省烟区需加强植烟土壤保育,增施有机肥,实行轮作,施用石灰中和改良酸性较严重土壤。

Analysis on Nutrient Contents Status of Tobacco-planting Soil in Guizhou Province

In order to explore the soil fertility conditions of tobacco-planting area in Guizhou,the pH value and soil nutrient contents were analyzed based on 65 main tobacco towns,13 county produced tobacco,9 cities. The results showed that the soil acidity was between acid and neutral. The soil organic matter was rich and the content in the range of 20~40 g/kg accounted for 72.3%. Soil total nitrogen and available nitrogen were rich, and total nitrogen content was mainly above 1.0 g/kg,and available nitrogen content was above 90 mg/kg. Soil total phosphorus and available phosphorus were rich,and total phosphorus content was mainly above 0.8 g/kg,available phosphorus content was mainly above 10 mg/kg. Soil total potassium content was at intermediate-level,available potassium was rich and the content was mainly above 150 mg/kg. Soil chloride ion content was mainly below 30 mg/kg. In conclusion,we need to strengthen soil conservation,including application of organic fertilizer,rota-tion and application of lime to improve acid soil.