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作物学报 ›› 2016, Vol. 42 ›› Issue (07): 1026-1036.doi: 10.3724/SP.J.1006.2016.01026

• 耕作栽培·生理生化 • 上一篇    下一篇

干湿交替灌溉对水稻产量与水分利用效率的影响

褚光,展明飞,朱宽宇,王志琴,杨建昌*   

  1. 扬州大学江苏省作物遗传生理重点实验室 / 粮食作物现代产业技术协同创新中心,江苏扬州 225009
  • 收稿日期:2015-12-29 修回日期:2016-05-09 出版日期:2016-07-12 网络出版日期:2016-05-12
  • 通讯作者: 杨建昌, E-mail: jcyang@yzu.edu.cn, Tel: 0514-87979317
  • 基金资助:

    本研究由国家自然科学基金项目(31271641, 31461143015, 31471438),江苏省农业三新工程项目(SXGC[2014]313), 江苏高校优势学科建设工程资助项目(PAPD),江苏省普通高校研究生科研创新计划项目(KYZZ_0364)和扬州大学高端人才支持计划项目(2015-01)资助。

Effects of Alternate Wetting and Drying Irrigation on Yield and Water Use Efficiency of Rice

CHU Guang,ZHAN Ming-Fei,ZHU Kuan-Yu,WANG Zhi-Qin,YANG Jian-Chang*   

  1. Jiangsu Key Laboratory of Crop Genetics and Physiology / Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou 225009, China
  • Received:2015-12-29 Revised:2016-05-09 Published:2016-07-12 Published online:2016-05-12
  • Contact: 杨建昌, E-mail: jcyang@yzu.edu.cn, Tel: 0514-87979317
  • Supported by:

    The research was supported by the National Natural Science Foundation of China (31461143015, 31271641, 31471438), Jiangsu “Three-innovation” Agricultural Project (SXG2014313), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), Innovation Research Program for Graduate Students for Higher Education of Jiangsu Province (KYZZ_0364), and the Top Talent Supporting Program of Yangzhou University (2015-01).

摘要:

本研究旨在阐明干湿交替灌溉影响水稻产量的生理机制。大田种植3个当地高产水稻品种武运粳24 (粳稻)、扬两优6号(两系杂交籼稻)与甬优2640 (三系籼/粳杂交粳稻)。自移栽后7 d设置:常规灌溉(CI,保持水层)和干湿交替灌溉(AWD),观察这2种灌溉模式对水稻根系与地上部生长发育的影响。结果表明,与CI相比,AWD可以显著提高水稻产量与水分利用效率,3个供试品种产量分别提高了5.34%、5.85%和6.62%,水分利用效率分别提高了28.9%、25.3%和27.6%。产量与水分利用效率的提高主要得益于水稻根系和地上部植株的生理功能的改善,表现出灌浆期较高的根系氧化力、根系伤流液强度、根系与叶片中玉米素与玉米素核苷的含量、剑叶净光合速率、籽粒中较高的蔗糖合酶、腺苷二磷酸葡萄糖焦磷酸化酶和淀粉合酶活性、较大的深层(10~20 cm)根系、较高的分蘖成穗率与叶面积指数。

关键词: 水稻, 产量, 根系, 水分利用率, 干湿交替灌溉

Abstract:

Alternate wetting and drying (AWD) irrigation has been widely adopted to replace conventional irrigation (CI) for saving water and increasing water use efficiency (WUE) in irrigated rice systems in China. However, there is limited information about how AWD affects yield, WUE, and root and shoot growth and development. To fill this knowledge gap, we conducted the experiment using three local high-yielding rice cultivars, Wuyunjing 24 (japonica), Yangliangyou 6 (two-line indica hybrid rice) and Yongyou 2640 (three-line indica/japonica hybrid rice) under the two water managements, CI and AWD, during the whole growing season. The results showed that, when compared with CI, AWD increased grain yield by 5.34%, 5.85%, and 6.62% and WUE by 28.9%, 25.3%, and 27.6%, respectively which mainly attributed to greater root oxidation activity, amount of root bleeding sap, content of cytokinins (zeatin + zeatin riboside) in roots and leaves, highten photosynthetic rate of flag leaf, deeper root distribution, increased productive tillers and leaf area, and enhanced activities of enzymes involved in sucrose-to-starch conversion in grains during grain filling. The results demonstrate that AWD is an effective practice to increase grain yield and water use efficiency through enhancing root and shoot growth and development.

Key words: Rice, Yield, Root, Water use efficiency, Alternate wetting and drying

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