大安市苏打盐碱地水田土壤施肥模型研究

Studies on Mathematical Models of Recommend Fertilization for Soda Saline-alkali Paddy Fields of Daan City

[目的]探寻苏打盐碱地水田土壤最佳施肥方案。[方法]采用正交设计进行试验,通过计算机模拟寻优。[结果]建立水田土壤施肥量的数学模型,并通过主效应与产量关系的分析,得到苏打盐碱土水田土壤最佳产量施肥量为:纯N 175 kg/hm2,P2O5 137/hm2,K2 O 50 kg/hm2,ZnSO4 32 kg/hm2。分别以尿素、磷酸二铵、硫酸钾和硫酸锌计算,折算肥料用量为813 kg/hm2。[结论]该研究为苏打盐碱地科学施肥提供技术支持。

[Objective]The research aimed to explore best fertilization programs in the saline-alkali soil.[Method]The orthogonal design was carried out,and the fertilization program was optimized by computer simulation optimization. [Result]The mathematical model of paddy soil fertilizer was established. The relation between lord effect and the yield was analyzed. Gain optimum fertilizing amount of the best yield in the saline-alkali soil was as follows： pure N 175 kg/hm2,P2O5 137/hm2,K2O 50 kg/hm2,ZnSO4 32 kg/hm2. Calculated by urea,diammo- nium phosphate,potassium sulfate and zinc sulfate,the amount of fertilizer was 813 kg/hm2.[Conclusion]The study provided technical support for scientific fertilizer in the saline-alkali soil.