春小麦优化栽培群体形态指标及其动态变化

为了给高产栽培管理指标化、数量化提供依据，以春小麦品种永良4号为材料，通过五元二次回归分析方法系统地研究了春小麦在高产优化栽培措施下株高、分蘖数、展开叶片数等群体形态指标的动态变化规律，建立了春小麦不同生育时期群体主要形态指标与密度、氮、磷、钾施用量关系的数学模型。

Population Shape Indexes and Their Dynamic Change of Spring Wheat under Optimized Cultivation

In the experiment, a regression analysis method with five unknown factors was adopted to study the change principle of population shape indexes including plant height, stem numbers and leaves at different growth stages under optimized cultivation condition. According to the results, a mathematic model was built to describe the relations among density, amount of N,P,K applied and main shape indexes in different growth stages. A heteriotic combination scheme of the synthetical agricultural measures was put forward and the dynamic change principle of spring wheat population shape indexes was exposed under heteriotic cultivation measures.