摘要
为阐明诸城烟区植烟土壤肥力差异，推进大田精细管理与合理施肥，基于GPS定位技术，共取得384个耕层（0～20cm）土壤样品，采用GIS技术和地统计学、经典统计学相结合的方法，对其土壤养分（有机质、水解氮、有效磷、速效钾）的空间变异及分布特征进行分析。结果表明：诸城植烟土壤养分均表现出一定程度的变异，其变异程度大小表现为：有效磷〉速效钾〉有机质〉水解氮。其空间变异均可以直接进行变异函数拟合，其中土壤水解氮具有强烈的空间相关性，说明其受母质、地形、土壤类型等结构因素影响较大；土壤有机质、速效磷、速效钾具有中等的空间相关性，说明其受结构因素和施肥等随机因素共同影响。
In order to elucidate the difference of soil fertility in Zhucheng tabacco area, promote accurate management and proper fertilization of tobacco soil,based on GPS positioning technology,spatial analysis on tobacco soil nutrients was conducted by GIS and geo-statistics. The results showed that spatial variability of soil nutrient were existed on some extent in the whole research region, and the sequence showed that P〉K〉O〉N.The semi-variograms for soil organic matter, available nitrogen,phosphorus and potassium contents were all well fitted by an expected model.Soil available nitrogen had strong spatial correlation, it was indicating that soil available nitrogen controlled by structural factors like parent material, relief and soil type ;while soil organic, available phosphorus and potassium had moderate spatial correlation, it suggested that they were co-affected by structural factors and random factors such as fertilization and field managements.
出处
《现代农业科技》
2013年第8期197-199,202,共4页
Modern Agricultural Science and Technology
