开花前后变水条件对春小麦的补偿效应

在防雨棚内的盆栽实验条件下，研究了4种梯度的10种不分组合对红芒麦和宁春10号产量及耗水量等的影响。结果表明，试验期间充分灌水，轻度，中度，重度干旱处理，随着干旱程度的加剧，株高，干物质积累，产量，耗水量都逐渐减少；红芒麦灌浆期不同程度的,匀有利于产量的形成，促进物质运输，提高千粒重，同时减少水分消耗，提高WUE；孕穗期干旱处理后，灌浆期复水，会造成减产，和灌浆期相比，孕穗期是水分的敏感的时期，而灌浆期对水分亏缺不敏感，两种小麦相比较，宁春10号耗水量大，产量低，抗旱性较强，图2表2参7

COMPENSATORY EFFECT OF VARIED WATER CONDITIONS ON SPRING WHEAT BEFORE AND AFTER FLOWERING

The effects of 10 soil water treatments on water consumption and yield of spring wheat,Hongmang wheat and Ningchun 10 wheat, were studied by pot culture with rainproof shelter. The results showed that plant height, ear length, yield, water consumption and dry matter accumulation would be reduced with the increase of water stress under 4 treatments (water supply, mild, medium and severe drought) in experiment period. Different drought treatments on Hongmang wheat at grain filling stage would help forming of high yield, accelerate matter transportation, enhance kilo grain weight, reduce water consumption and increase WUE. Yield would be reduced when water was supplied at grain filling stage after drought in booting stage, which was a sensitive stage to water deficit. Compared with Hongmang wheat, Ningchun 10 had much water consumption, lower yield and stronger drought resistance. Fig 2, Tab 2, Ref 7