马铃薯高产群体淀粉和氮、磷、钾、分配的数学模型

Mathematical Models for Starch Accumulation and Distribution of N.P.K in High-yielding potato population

本试验以内蒙古乌盟地区主栽品种紫花白为材料,对马铃薯高产群体生育过程中茎秆、叶片、块茎的淀粉、氮素、磷素、钾素的含量及其向块茎中运转状况进行了测定分析,并采用数理统计分析和数学模拟手段,对数据进行了处理,以生育时期 X_1和密度 X_2为自变量,淀粉、氮、磷、钾的含量分别为因变量,建立了淀粉、氮、磷、钾在植株各器官中积累分配的多项式回归方程和曲线。充分揭示了实际系统的真实规律,可做为高产马铃薯栽培的田间诊断、看苗促控管理的重要指标及制定栽培规范化、管理指标化方案的科学依据。

Zihuabai',a local Potato cultivar widely grown in Ulanchabu District ofInner Mongolia,was used in this experiment.During plant growth and development,contents of starch,N.P.and K in shoots,leaves and tubers weremeasured and the translocation of these nutrients from shoots and leaves totubers were monitored in selected high-yielding potato population.The dataswere treated by a mathematical simulating method designating growth anddevelopment stages and plant population densities as two independent variablesX_1 and X_2,contents of starch,N.P.and K as dependent variables.A polyno-mial regression model was estadlished for accumulation and distribution ofthese nutrients in different organs of the Plants.The model fitted well withactual situations in different developmental stages and under different plant-popul-ation densities.It was proposed that the model could be used as a gui-deline for diagnosing plant nutrition status and for predicting and final yield.