贵州省低热地区早春番茄平衡施肥数学模型研究

Study on Mathematical Model of Balanced Fertilization for Earlier Tomato in Lower Altitude Areas in Guizhou

[目的]为了研究贵州省低热地区N、P、K施用量与产量的相关关系。[方法]采用"3414"二次回归设计,以N、P、K为供试因子,番茄产量为目标函数,对贵州省低热地区早熟番茄施肥数学模型进行研究。[结果]根据建立的数学模型获得优化施肥技术方案:N、P、K最佳施用量分别为104.55、112.95、502.95 kg/hm2,产量可达115 719.00 kg/hm2。[结论]该研究为优化N、P、K肥施用量,制定番茄专家系统的施肥决策提供了依据。

[Objective] The aim of this paper was to study the relationship between the yield and application amount of N, P and K in lower ahitude areas of Guizhou Province. [Method] Using the quadratic regression design of 3414, mathematical model of fertilization for earlier tomato was studied in lower altitude areas in Guizhou Province by taking the N, P and K as factors and the yield of tomato as objective function. [Result] According to the mathematical model, with the optimal proportion of fertilizer N, P and K of 104.55 kg/hm^2, 112.95 kg/hm^2 and 502.95 kg/hm^2, respectively, the yield could reach 115 719.00 kg/hm^2. [Conclusion] References were offered in this paper for the application of N, P and K as well as making fertilization decision of tomato expert system.