| 刘春梅,董曦文,严跃辉,陈瑞阳,贲昊同,黄陈伟,许文政.叶面喷硒对不同氮水平下寒地水稻氮代谢和产量的影响[J].农业环境科学学报,2025,44(9):2253-2263. |
| 叶面喷硒对不同氮水平下寒地水稻氮代谢和产量的影响 |
| Effects of foliar spraying with selenium on nitrogen metabolism and yield of rice grown under different nitrogen levels in cold regions |
| 投稿时间：2024-08-28 |
| DOI：10.11654/jaes.2024-0722 |
| 中文关键词: 硒 氮肥 水稻 寒地 氮代谢 |
| 英文关键词: selenium nitrogen fertilizer rice cold area nitrogen metabolism |
| 基金项目:校启动计划项目（XDB-2016-04）；黑龙江省重点研发计划项目（2023ZX02B01-03） |
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| 中文摘要: |
| 为探究不同氮水平下，叶片喷施两种硒肥对水稻生长发育及氮代谢关键酶活性的调控机制，明确不同氮水平下叶面喷硒对水稻氮吸收积累及产量的影响，以“垦粳8”水稻品种为研究对象进行二因素随机盆栽试验设计，设置4个氮水平，分别为N0（不施氮）、N1（75 kg·hm-2）、N2（100 kg·hm-2）、N3（125 kg·hm-2）；设置 2个硒肥品种，Se1（无机硒）和 Se2（有机硒），浓度均为 100 mg·kg-1；对照为 Se0（喷清水）。共 12个处理。结果表明：N3Se1处理水稻各器官氮含量显著高于 N0Se1处理，孕穗后第 20天水稻叶片、茎鞘、根、穗全氮含量分别显著增加了37.69%、39.39%、26.55%、35.23%，在一定程度上有助于水稻生长发育及氮素吸收积累。在相同氮水平下，Se1处理氮代谢关键酶显著高于Se2处理，孕穗后第20天，Se1处理水稻叶片硝酸还原酶（NR）、谷氨酰胺合成酶（GS）、谷氨酸合成酶（GOGAT）活性分别较Se2显著增加了6.39%~43.85%、3.64%~5.97%、1.21%~100.00%。不同氮水平下，N3Se1处理水稻产量最高，比 N0Se1处理增加了 199.63%；在相同施氮水平下，Se1处理增产效果明显，高于 Se2处理 4.73%~22.39%。氮硒互作条件下，可促进水稻产量增加。研究表明，不同氮水平下施用外源硒能影响水稻氮代谢，其中施氮量125 kg·hm-2，孕穗期施用无机硒可显著促进“垦粳8”氮代谢关键酶活性及产量的提高。 |
| 英文摘要: |
| To investigate the regulation of key nitrogen metabolism enzyme activities in rice under varying nitrogen levels and to examine the effects of foliar applications of two selenium fertilizers on rice growth and development, as well as the influence of foliar application of selenium on rice nitrogen uptake, accumulation and yield under different nitrogen levels. A two-factor random pot experiment was conducted with "Kenjing 8" rice variety as the research object, and four nitrogen levels were set, namely N0（no nitrogen application）, N1 （75 kg·hm-2）, N2（100 kg·hm-2）, N3（125 kg·hm-2）, 2 selenium fertilizer varieties, including Se1（inorganic selenium）and Se2（organic selenium）, the concentrations were both 100 mg·kg-1, and 12 varieties were treated with water spray compared with Se0. Results indicate that N3Se1 treatment significantly increased nitrogen content in all rice organs compared to N0Se1 treatment, 20 days after heading, nitrogen content in rice leaves, stems, roots, and panicles increased significantly by 37.69%, 39.39%, 26.55%, and 35.23%, respectively. This contributes to rice growth and development as well as nitrogen uptake and accumulation to a certain extent. At identical nitrogen levels, foliar application of different selenium fertilizers showed that Se1 treatment exhibited significantly higher key nitrogen metabolism enzyme activities than Se2 treatment. 20 days after heading, the activities of nitrate reductase（NR）, glutamine synthetase（GS）, and glutamate synthase（GOGAT）in rice leaves increased significantly by 6.39%-43.85%, 3.64%-5.97%, and 1.21%-100.00%, respectively. Under different nitrogen levels, the N3Se1 treatment yield the highest rice production, increasing by 199.63% compared to the N0Se1 treatment. At the same nitrogen application rate, Se1 treatment showed a significant yield-enhancing effect, exceeding the Se2 treatment by 4.73% to 22.39%. Under conditions of nitrogen-selenium interaction, rice yield can be enhanced. In summary, exogenous selenium application at different nitrogen levels can influence rice nitrogen metabolism. Specifically, at a nitrogen rate of 125 kg·hm-2, inorganic selenium applied during the booting stage significantly enhanced the activity of key nitrogen metabolism enzymes and increased yield in the‘Kenjing 8’rice variety. |
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