烤烟施肥数学模型及推荐施肥专家系统研究

摘要

Based on the data of 3414 fertilizer experiment in Hengyang tobacco field, the relevant technical parameters of precision fertilization of Hengyang lfue-cured tobacco were obtained, and the best mathematical model for estimating the effective nutrient correction coefifcient of tobacco planting soil was selected. According to Stanford formula, (Y) and tobacco yield (X1) and soil nutrient content in tobacco ifelds were established according to the target yield of tobacco leaf, available nutrient test value of tobacco planting soil and actual fertilization amount(X2). The mathematic model and calculation process of optimum fertilization were put into Excel software and APP smartphone, and an expert system of tobacco recommendation fertilization was constructed. The system is simple and convenient to guide the tobacco farmers to fertilize adjusting measures to local conditions, while simple, easy to understand, feasible, suitable for grass-roots technical staff and farmers to use.%通过分析衡阳烟区烤烟3414肥效试验数据，获得了衡阳烤烟精准施肥的相关技术参数，筛选出了植烟土壤有效养分校正系数估算的最佳数学模型；并依据斯坦福施肥量计算公式W＝（U-Ns）/R，结合烟叶目标产量、植烟土壤速效养分测试值及实际施肥纯量等指标，建立了N、P、K施肥用量（Y）同烟叶产量（X1）和烟田土壤养分含量（X2）的二元一次回归数学模型；将最适施肥的数学模型及计算过程置入Excel软件和安卓智能手机APP中，构建了烟草推荐施肥专家系统。该系统能简单方便地指导烟户因地制宜地精准施肥，同时通俗易懂、可行性高，适合基层技术人员及农户使用。