曲靖烟区植烟土壤养分状况分析

Analysis of the Nutrient Status for Tobacco-growing Soils in Qujing

为了了解曲靖烟区土壤养分状况,对采集的曲靖烟区3716个土样进行了养分状况分析,结果表明:土壤pH值平均为6.27,有机质含量3.7%,碱解氮、有效磷、速效钾含量分别为130.23、28.14、201.83 mg/kg,有效硼含量0.424 mg/kg,水溶性氯含量27.23 mg/kg。烟区有机质和碱解氮含量总体偏高;有效磷除富源县含量偏低外,其他县(市)都处于适宜或富余范围;陆良县速效钾含量偏低,建议补充钾肥;有效硼普遍缺乏。不同植烟县(市)间养分差异较大,各养分的变异程度大小顺序为水溶性氯>有效硼>速效钾>有效磷>有机质>碱解氮。因此,提出控氮、稳磷、保钾,合理增施硼肥的建议。

In order to know the nutrient status of tobacco-growing soils in Qujing, 3 716 soil samples were collected and analyzed. The results showed that the average soil pH value was 6.27, the average contents of organic matter, available N, available P, available K, available B and available Cl were 3.7%, 130.23 mg/kg, 28.14 mg/kg, 201.83 mg/kg, 0.424 mg/kg and 27.23 mg/kg, respectively. The contents of organic matter and available N were generally high in tobacco-growing soils; except the available P in soils from Fuyuan country was low, the other counties were in the range of appropriate or rich; the available K in soils from Luliang county was low, therefore it should add K fertilizer to the soil; the available B was generally lacking in the tobacco-growing soils. Moreover, the content of soil nutrients shows significant variation at different locations, and the order of coefficient of variation （CV） was available Cl〉available B〉 available K〉available P〉organic matter. Therefore, the suggestions that the tobacco-growing soils in Qujing should control N content, steady P content and K content, and add B fertilizer were proposed.