关键词: 冬小麦, 节水, 高产, 栽培, 生理基础

Abstract:

A system for cultivating winter wheat that utilize less water while producing high yields has been developed in five years of research (1991-1996) at the China Agricultural University's Wuqiao Expriment Station at Cangzhou Prefecture in Hebei Province. The principal components of the cultivation system are (1) increasing uptake of water stored in the soil by the limiting and rational distribution of water; (2)regu-lating yield components by agrotechniques such as late-sowing, higher planting rates, increased use of phosphorus fertilizer, adjusted irrigation rates, etc; and (3)increasing photosynthate accumulation and harveat index by limiting irrigation after the stem elongation stage, Compared to traditional high-yielding techniques, this system can save between 750m3 and 1500m3 irrigation water per hectare and increase grain production/ water ratio 1. 2kg/m3 to 1. 5kg/m3.

Key words: Winter wheat Water-saving High-yielding Cultivation Physiological basis