摘要
【目的】优化水稻水分管理。【方法】采用盆栽试验,设置单生育期和2个生育期连续水分亏缺状态,分别设中度和重度2种水分亏缺水平,并以正常灌溉为对照(CK),共15个处理,分析了水稻的生长情况、荧光参数、产量以及耗水量。【结果】单生育期和2个生育期连续中度水分亏缺处理(土壤饱和含水率的70%~80%)均可显著提高水稻叶片F_v/F_m和F_v'/F_m',而重度水分亏缺处理(土壤饱和含水率的60%~70%)的F_v/F_m和F_v'/F_m'与CK相比无显著差异。水分亏缺处理可显著降低水稻耗水量,其中分蘖期水分亏缺处理降低水稻耗水量幅度较大。单生育期中度水分亏缺处理均不会造成水稻减产,并且可以显著提高水稻水分利用效率,其中分蘖期中度水分亏缺处理的水分利用效率最高,为1.460 g/kg。【结论】单生育期中度水分亏缺是水稻生长较适宜的水分状态。
【Objective】Plant physiological development is determined by soil moisture content and temperature,and this study was to investigate the effects of deficit irrigation on chlorophyll fluorescence parameters of rice at different growth stages and its ultimate yield.【Method】Pot experiments were conducted; we examined 15 treatments by keeping soil continuously at water deficit during a single growth stage or two growth stages either at moderate water deficit or severe water deficit; normal sufficient irrigation was used as control.【Result】Moderate deficit lasting continuously for one growth stage or two enhanced the Fv/Fmand Fv＇/Fm＇of the leaves significantly, while severe water deficit did not changed the Fv/Fmand Fv＇/Fm＇significantly compared to the control. Water deficit at the tillering stage did not lead to a noticeable change in the final number of effective tillers, but significantly increased the effective tillering rate while decreasing the water and nutrient loss caused by ineffective tillering. Moderate water deficit lasting for a single growth stage did not reduced yield despite its significant increase in water use efficiency. Water use efficiency under moderate water deficit at the tillering stage was the highest, being 1.460 g/kg.【Conclusion】Moderate water deficit lasting for a single growth stage is a suitable water deficit irrigation for rice without compromising its yield.
作者
杨桦
张忠学
郑恩楠
付翰文
罗佳瑞
韩建坤
YANG Hua;ZHANG Zhongxue;ZHENG Ennan;FU Hanwen;LUO Jiarui;HAN Jiankun(School of Water Conservancy and Civil Engineering,Northeast Agricultural University,Harbin 150030,China;Key Laboratory of Effective Utilization of Agricultural Water Resources,Ministry of Agriculture,Harbin 150030,China;Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang 212013,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;College of Civil and Transportation Engineering,Hohai University,Nanjing 210098,China)
出处
《灌溉排水学报》
CSCD
北大核心
2018年第10期35-41,共7页
Journal of Irrigation and Drainage
基金
国家重点研发计划项目(2016YFC0400108)
国家自然科学基金面上项目(51779046)
关键词
水稻
水分亏缺
荧光参数
产量
rice
water deficit irrigation
chlorophyll fluorescence
yield
