叶面积指数和叶片氮素含量是决定小麦群体长势的重要生理指标，也是制定栽培管理措施的必要依据。
Wheat LAI and leaf nitrogen content are important physiological indices for determining the growth condition and necessary basis for establishing cultivation and management measure.
氮肥主要影响冬小麦营养体个体形态特征和群体结构，对功能叶生理指标的影响程度远低于遗传因子。
Nitrogen fertilizer mainly affected the winter wheat individual character and colony's structure , nitrogen had less affected on functional leaves than genetic factors.
同时利用一套双向导入系群体，分别在正常和低氮条件下考察相应形态指标、生理指标和产量性状。
A set of reciprocal introgressive line populations was used to study phenotypic index, physiological index and yield characteristic of rice under normal and low-N conditions.
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