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为明确云南主要植烟产区土壤有机质含量空间分布变化及与其他土壤养分的关系,利用GPS技术采集196个云南烟区土壤样品,运用地统计学、经典统计方法、灰色关联分析方法及Kriging插值法分析云南烟区植烟土壤有机质含量的总体特征、丰缺评价、空间分布变化规律及与土壤养分的相关关系。结果表明,云南烟区植烟土壤有机质含量涵盖缺乏、偏低、适宜、偏高和丰富所有范围,总体上属适宜水平,平均值为24.21 g/kg,变异系数为38.04%,属中等变异,处于适宜范围内的样本占36.13%;文山植烟土壤有机质含量高于红河、昆明、保山和曲靖烟区;土壤有机质含量随着碱解氮的增加而升高,为正相关关系;土壤养分与有机质含量的关联度从高到低依次排列为碱解氮>速效磷>速效钾>氯离子>有效硼>有效镁>有效钙;烟区土壤有机质、碱解氮、氯离子和速效磷呈现明显的区域差异性,为斑块状分布态势;植烟土壤有机质含量总体上从文山的东部和保山的西南部向中部及南部减少,碱解氮从文山的东部、昆明的西部和保山的西南部向中部及南部逐渐减少,速效磷从昆明的西北部和保山的北部向中部及南部逐渐减少,氯离子从红河、文山的中部和昆明、曲靖的北部向南部逐渐减少。
In order to clarify the spatial distribution of soil organic matter content and its relationship with other soil nutrients in Yunnan tobacco growing areas, 196 soil samples collected from Yunnan tobacco growing area were collected by using GPS technology. Using the methods of geostatistics, classical statistics, gray relational analysis and Kriging interpolation Method was used to analyze the general characteristics, abundance and deficiency evaluation, the spatial distribution of soil organic matter and its relationship with soil nutrients in tobacco growing areas in Yunnan Province. The results showed that the content of organic matter in tobacco-planting soil in Yunnan Province was low, moderate, high and rich in all areas. Generally speaking, it was an appropriate level with an average of 24.21 g / kg and a coefficient of variation of 38.04% The content of soil organic matter in Wenshan tobacco planting was higher than that in Honghe, Kunming, Baoshan and Qujing tobacco-growing areas. The content of soil organic matter increased with the increase of alkali-hydrolyzable nitrogen, and the soil nutrients and The correlation degree of organic matter content from high to low was ranked as:> available phosphorus> available potassium> chloride> available boron> available magnesium> available calcium; soil organic matter, available nitrogen, chloride and available phosphorus showed obvious The distribution of soil organic matter decreased from the east of Wenshan and the southwestern part of Baoshan to the middle and the south, and the content of soil available nitrogen decreased from the east of Wenshan, the west of Kunming and the southwest of Baoshan Gradually decreased to the central and southern parts of the available phosphorus from the northwest of Kunming and Baoshan to the central and southern parts of the gradual decrease of chloride ions from the Red River, the central part of Wenshan and Kunming, north of Qujing gradually south Less.