水稻株高生长对旱涝交替胁迫的动态响应研究

Dynamic Response of Rice Plant Height Growth to Water Level Control on Condition of Drought-waterlogging Alternating Stress

目前农田水位调控通过调节农田水位状况降低旱涝胁迫对麦田生长指标变化规律研究已成为前沿领域的热点问题。在水位调控技术的基础上研究了水位调控下不同生育阶段旱涝胁迫对作物株高调控作用。结果表明:旱涝交替胁迫条件下水稻株高均较对照(CK)高,而若其中两个生育期均被控水处理,则对株高的促进作用较单个生育期处理强;水稻在旱涝交替胁迫条件下出现抗倒伏能力增强的现象;此外,通过对旱涝交替胁迫的控水时间和阈值作合理安排,实现弱化单一胁迫危害的作用,可以获得水稻种植上较积极的效果。

The current water level control technology through the regulation of farmland water conditions to reduce water-logging stress and the study on variation rules of growth index of crop have become hot front issues of the discipline.Based on the water level control technology,this paper studies the effect of drought-waterlogging alternating stress on regulation of plant height at the different growth stages under water level control.The results show that：under drought-waterlogging alternating stress conditions,rice plant height is higher than that of CK,and if both the two growth stages are under water level control,the promoting effect is greater than that of control only for a single growth stage;the lodging resistance ability of rice is enhanced under the drought-waterlogging alternating stress condition;in addition,through the reasonable arrangement of water control time and the threshold under drought-waterlogging alternating stress condition,the effect of weakening the damage of single stress can be realized and more positive effects on rice planting can be got.