| On the basis of the summarization of the researches of water-saving and high-yield wheat production, the paper brings forward the concept of optimal plant shape of wheat. The optimal plant shape includes optimal canopy structure and optimal root structure. The ideal canopy structure of water-saving and high-yield appears to be a structure consisting of such characters as big population, small individual plants, small and erective upper leaves and high percentage of the green area formed by spikes, the internodes next to spikes and flagleaf sheaths, high ratio of total spike number to leaves, low water consumption, and strong resistance; the optimal root structure should consists of high number of primary roots, deep root penetration, high percentage of roots in deep soil layers and high vigor. Besides, it discusses the regulating and controlling techniques to create the optimal plant shape in water-saving and high-yield wheat production. |