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论文以山东广饶县为例,进行了基于栅格数据的耕地测土配方施肥技术研究。利用GIS技术对研究区域养分采集样点进行插值,得到县域氮、磷、钾养分含量分布图,然后对县域目标产量区划图,土壤养分校正系数分布图,县域氮、磷、钾肥料利用率分布图进行栅格化处理,图件栅格大小为50 m×50 m,数量为1145×1684个。研究区域耕地面积为61609.51 hm2,每个栅格代表的面积是0.032 hm2。最后在GIS中对栅格图件进行计算,得到每个栅格的施肥量,进而得到施肥配方。结果表明,栅格数据具有较高的表达精度,研究结果对耕地利用和施肥工作有积极的指导作用。
Taking Guangrao County in Shandong Province as an example, this paper studied the technology of soil testing and formula fertilization based on raster data. Using GIS technology to interpolate sampling points in the study area, the nutrient distribution maps of nitrogen, phosphorus and potassium in the county were obtained. Then the regional output maps of target yield, the distribution maps of soil nutrients, the distribution of nitrogen, phosphorus and potassium fertilizers in the county Figure rasterization processing, graph grid size of 50 m × 50 m, the number of 1145 × 1684. The area of cultivated land in the study area is 61609.51 hm2, and the area represented by each grid is 0.032 hm2. Finally, the grid graph is calculated in the GIS to obtain the amount of fertilizer applied to each grid, and then the fertilizer formula is obtained. The results show that the raster data has higher expression precision, and the research results have positive guidance on the utilization and fertilization of arable land.