| 引用本文: | 徐 晨,刘晓龙,李 前,等.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. |
| XU Chen,LIU Xiaolong,LI Qian,et al.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. |
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| 摘要: |
| 【目的】探究供氮水平对不同时期盐胁迫下水稻生长及某些生理特性的影响。【方法】以2个北方常规粳稻品种为材料，采用盆栽试验方法，开展了5个氮水平对3个时期盐胁迫下水稻植株地上部与根系的生物量、渗透调节物质量、水稻叶片丙二醛量和膜透性影响的研究。【结果】①盐胁迫下水稻地上部与根系的生物量积累均显著降低，与CK相比，在分蘖期、孕穗期和抽穗期分别以营养液正常含氮量的2倍、1倍和0.5倍水平下降低的幅度最小。②盐胁迫下，2个水稻品种叶片与根系的可溶性糖和脯氨酸量均显著增加，与CK相比，在分蘖期、孕穗期和抽穗期时分别以营养液正常含氮量的2倍、1倍和0.5倍水平下增加的幅度最大。③盐胁迫下水稻叶片的丙二醛质量摩尔浓度和膜透性均显著增加，与CK相比，分别以营养液正常含氮量的2倍、1倍和0.5倍水平下增加的幅度最小。【结论】综上可知，盐胁迫条件下，分蘖期、孕穗期和抽穗期最佳的施氮水平应为营养液正常含氮量的2倍（1.43 mmol/L）、1倍（0.715 mmol/L）和0.5倍（0.357 5 mmol/L）水平。 |
| 关键词: 水稻； 氮水平； 盐胁迫； 生物量； 渗透调节物质； 质膜透性 |
| DOI：10.13522/j.cnki.ggps.2017.0174 |
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| Growth and Physiological Characteristics of Rice as Affected by NaCl under Different Nitrogen Applications |
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XU Chen, LIU Xiaolong, LI Qian, WANG Hongjun, WANG Nan, LING Fenglou, WU Zhihai, ZHANG Zhian
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Jilin Agriculture University, Changchun 130118, China; Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; Jilin Academy of Agriculture Sciences, Changchun 130124, China
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| 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. ②Salt 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). |
| Key words: rice; nitrogen level; salt stress; biomass; osmotic regulation substances; plasma membrane permeability |
