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通过采集、测定南平烟区代表性植烟土壤中、微量元素含量状况,借助GIS、GPS与地统计学模型(Geo-statistic)集成,研究其空间分布状况,并作出分区评价。结果表明:土壤有效锌、水溶性氯平均含量分别为2.55mg/kg、20.22mg/kg,含量中等以上面积分别占总耕地面积的94.71%、45.15%;交换性钙平均含量分别为531.69mg/kg,含量较低和中等的面积占93.68%;交换性镁平均含量80.09mg/kg,丰富面积占70.61%;有效硫平均含量35.30mg/kg,含量中等以上面积占89.45%;有效硼平均含量0.26mg/kg,含量低值面积占64.60%。交换性钙和有效锌可划分为2个类区,水溶性氯可划分为4个类区,交换性镁和有效硫、有效硼则可划分为3个类区。同时,根据土壤碱解氮、速效磷和水溶性氯等主要养分的分布分区状况和丰缺程度,提出了8个施肥分区和5个烤烟专用肥分区,并根据每个分区的特点给出了相应的专用肥配方建议,实现烤烟统一、简化施肥。
Through the collection and determination of the content of trace elements in the representative tobacco-growing soil in Nanping tobacco-growing area, the spatial distribution of the soil was studied by means of GIS, GPS and Geo-statistic, and the zonal evaluation was made. The results showed that the average contents of available zinc and soluble chlorine in soils were 2.55mg / kg and 20.22mg / kg, respectively, and the areas above middle level accounted for 94.71% and 45.15% of the total cultivated area respectively. The average exchangeable calcium contents were 531.69mg / kg, the content of the lower and middle accounted for 93.68%; the average content of exchangeable magnesium was 80.09mg / kg, the rich area accounted for 70.61%; the average content of available sulfur was 35.30mg / kg, and the content above middle level accounted for 89.45% 0.26mg / kg, low content area accounted for 64.60%. Exchangeable calcium and available zinc can be divided into two categories, water-soluble chlorine can be divided into four categories, exchangeable magnesium and available sulfur, available boron can be divided into three categories. At the same time, according to the distribution status of main nutrients such as soil available nitrogen, available phosphorus and water-soluble chlorine and the degree of abundance and deficiency, eight fertilization zones and five special fertilizer zones for flue-cured tobacco were proposed, and according to the characteristics of each zone, The corresponding formula recommended special fertilizer to achieve uniform tobacco and simplify fertilization.