中国生态农业学报2017，Vol.25Issue(3)：373-380,8.DOI:10.13930/j.cnki.cjea.160669
滴灌甜菜对糖分积累期水分亏缺的生理响应
Physiological response of sugar beet (Beta vulgaris L.) to water deficit at sugar accumulation stage under drip irrigation
摘要
Abstract
Understanding the effects of water deficit on the physiological characteristics of sugar beet is essential for the determination of the minimum soil water content during sugar accumulation stage. Thus a field experiment was conducted to study the changes in leaf photosynthetic characteristics, water stress index, recovery degree, yield and technological sugar yield under drought resistance and rehydration cultivation. The study included three soil water content levels in the 0–40 cm depth — 70% of field capacity (T1), 50% of field capacity (T2) and 30% of field capacity (T3). The results showed that the yield and technological sugar yield under T3 were significantly higher than those under T1 and T2 by 51.34%, 51.47%, and 36.72%, 39.48%, respectively. Leaf proline and soluble sugar contents were sensitive to water deficit before rehydration.Moreover, both leaf proline and soluble sugar contents were positive correlated with the degree of water deficit. Rehydration after water stress showed positive compensation effect on membrane permeability, antioxidant enzyme activities and osmotic adjustment substances contents of sugar beet. The enhancements were observed in leaf malondiadehyde content, peroxidased and catlase enzyme activities, proline and soluble sugar contents which favored increased osmotic adjustment. Therefore, prompt supplemental irrigation was needed when soil water content dropped to 30% of field capacity during sugar accumulation stage, which had a compensation effect on sugar beet under water deficit cultivation. It was helpful to work toward high yield and quality of sugar beet under drip irrigation in arid areas.关键词
甜菜/水分亏缺/复水/补偿效应/生理响应/水分胁迫指数/产量Key words
Sugar beet/Water deficit/Rehydration/Compensation effect/Physiological response/Water stress index/Yield分类
农业科技引用本文复制引用
李阳阳,费聪,崔静,王开勇,马富裕,樊华..滴灌甜菜对糖分积累期水分亏缺的生理响应[J].中国生态农业学报,2017,25(3):373-380,8.基金项目
国家自然科学基金项目(31260299)、教育部科学技术研究重点项目(212201)、新疆生产建设兵团博士基金项目(2014BB012)和石河子大学杰出青年科技人才培育计划(2015ZRKXJQ03)资助 This work was supported by the National Natural Science Foundation of China (31260299), the Key Project of Chinese Ministry of Education (212201), the Doctoral Program of Higher Education of Xinjiang Production and Construction Corps (2014BB012), and the Training Program of Distinguished Young Scientists of Shihezi University (2015ZRKXJQ03). （31260299）
