摘要
利用温室管栽试验 ,研究了冬小麦生长对拔节期复水的响应。结果表明 ,拔节期恢复供水可使苗期受旱程度不同的冬小麦的株高、分蘖数、叶片数、叶面积、以及干物重等方面都超过其相应干旱对照。同时 ,各复水处理与对照相比 ,分配到冠部的干物质比例均增加 ,R/ S下降。植株通过形态响应—补偿生长而弥补前期干旱造成的损失。中度水分胁迫后充分供水的处理 ,可以在产量和生物量等方面接近或超出一直充分供水的对照 ,达到节水和增产的目的 ,不失为 1种理想的供水方式。
The response of winter wheat to rewatering during the jointing stage was studied in greenhouse. The results showed that the height of plant、number of tilling and leaf、leaf area and dry matter weight of winter wheat threaten by water stress in varying degree at seedling can exceed that of their drought controls after rewatering during jointing state. Meanwhile, The proportion of dry matter distributing to the shoot incresed and the R/S decreased as compare with their controls. The winter wheat plant compensate itself for the drought_generated loss of yields by morphologic response_compensatory growth. Grain yields and Biomass yields of the treatment that was subjected to moderate water stress equal to or exceed that of the control with sufficient water, this treatment has the best effects on increasing yield and water_saving.
出处
《内蒙古农业大学学报（自然科学版）》
CAS
2000年第3期1-6,共6页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
国家自然科学重大基金 !(批准号 :49391 60 3)
国家重点基础研究专项经费资助项目 !(批准号 :G1 9990 1 1 70 9)
关键词
冬小麦
拔节期
复水
形态响应
winter wheat
jointing stage
water-recovery
morphologic response.
