| 摘要: |
| 重点研究了京郊通县地区不同灌水条件下冬小麦根冠的发育规律，根冠间的动态消长关系及对后期产量形成的影响程度及敏感性。结果表明：水分胁迫会引起根、冠功能降低，导致根、冠生长与干物质积累量下降。然而不同水分条件下根、冠的生长特征，根、冠自调节、自适应的功能表现却不同；前期受水分胁迫抑制，后期恢复供水时，“补偿生长”作用较突出；根长密度最大速率的剖面分布将随着生育阶段的增长由表层向底层转移。 |
| 关键词: 根-冠关系,水分胁迫,冬小麦 |
| DOI： |
|
| 基金项目:北京市科委“八五”科技攻关项目 |
|
| Root and Shoot Relations of Winter Wheat Under Different Irrigation Conditions |
|
|
|
| Abstract: |
| The root-shoot development and dynamic relations of winter wheat were studied.The effects on dry matter accumulation, accumulating rate of root and shoot as weel as its yields and sensitivity to water were discussed. The results indicated that because of water stress, the function and growth of root and shoot is lower, the seed yield is decreased. The self-adjustment and self-adaptability of root and shoot were also changed under different conditions of soil moisture. The compensative growth of root and shoot was more evident due to rewatering at flowering stage after water stress, The maxium increment of root density in the profile is changed from up layer to down with the days after planting. |
| Key words: root and shoot relations,water stress,winter wheat |
