灌溉排水学报2018，Vol.37Issue(6)：48-53,6.DOI:10.13522/j.cnki.ggps.2017.0174
氮水平对不同时期盐胁迫下水稻生长及生理特性的影响
Growth and Physiological Characteristics of Rice as Affected by NaCl under Different Nitrogen Applications
摘要
Abstract
[Objective]Plant growth is affected by various abiotic and biotic stresses and the objective of this paper is to experimentally study how nitrogen application could alleviate the adverse impact of NaCl on rice.[Method]The experiments were conducted in pots with two conventional varieties of japonica rice cultivated in north China as the model plant. The nitrogen treatment was to adjust the nitrogen concentration in the nutrient solution used for fertigation at 400％ (4N), 200％ (2N), 100％ (1N), 50％(1/2N) and 25％(N/4) of the standard N concertation (0.715 mmol/L) normally used for fertigation. During the experiments, the below- and above-ground biomasses, the chemical compounds that control the osmosis in the leaf and root, MDA content, as well as the permeability of the leaf membrane were measured.[Result]①Compared to the CK (standard nitrogen concentration without NaCl stress), salt stress significantly reduced the accumulation of both above- and below-ground biomass in all treatments, although the reduction in 2N, 1N and N/2 was least at tillering and booting-heading stages. ② Salt stress elevated the contents of soluble sugar and proline in both leaf and root of the two varieties. ③Salt stress also enhanced the synthesis of MDA and the permeability of leaf membrane, although the increase was least at the tillering and the booting-heading stage under 2N, 1N and N/2.[Conclusion]The experiment revealed that the optimal nitrogen application during tillering, booting and heading stages for ameliorating NaCl stress is 2N(1.43 mmol/L), 1N(0.715 mmol/L) and 1/2N (0.357 5 mmol/L).关键词
水稻/氮水平/盐胁迫/生物量/渗透调节物质/质膜透性Key words
rice/nitrogen level/salt stress/biomass/osmotic regulation substances/plasma membrane permeability分类
农业科技引用本文复制引用
徐晨,刘晓龙,李前,王洪君,王楠,凌凤楼,武志海,张治安..氮水平对不同时期盐胁迫下水稻生长及生理特性的影响[J].灌溉排水学报,2018,37(6):48-53,6.基金项目
国家自然科学基金项目(31171459,31171478) （31171459,31171478）
吉林省科技发展计划项目(20130206006NY,20160107013NY,20170203003NY) （20130206006NY,20160107013NY,20170203003NY）
