硅素穗肥优化滨海盐碱地水稻矿质元素吸收分配提高耐盐性
本研究旨在阐明硅素穗肥调控盐碱地水稻抽穗期矿质元素分配的作用机制.以常规粳稻淮稻5号为材料,于2019年和2020年在江苏沿海大丰盐碱地(盐分3.4 g kg–1,pH 8.3)开展大田试验,设置3个硅肥用量(0、60和100 kg hm–2),于幼穗分化期随穗肥施入.结果表明:(1)硅素穗肥促进抽穗期植株养分吸收,提高成熟期干物质量和产量,与Si0相比,Si60平均增产4.3%,Si100平均增产8.6%;(2)硅素穗肥优化了水稻不同部位K+、Na+分配,提高水稻叶片、上部叶鞘、中下部茎秆K+含量,降低穗、上部叶片、叶鞘、茎秆Na+含量,提高各部位的K+/Na+,进而提高离子稳态;(3)硅素...
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| Published in | 作物学报 Vol. 49; no. 5; pp. 1339 - 1349 |
|---|---|
| Main Authors | , , , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
南京农业大学江苏省现代作物生产协同创新中心, 江苏南京210095
12.05.2023
南京农业大学农业农村部作物生理生态与生产管理重点实验室, 江苏南京210095 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 0496-3490 |
| DOI | 10.3724/SP.J.1006.2023.22031 |
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| Abstract | 本研究旨在阐明硅素穗肥调控盐碱地水稻抽穗期矿质元素分配的作用机制.以常规粳稻淮稻5号为材料,于2019年和2020年在江苏沿海大丰盐碱地(盐分3.4 g kg–1,pH 8.3)开展大田试验,设置3个硅肥用量(0、60和100 kg hm–2),于幼穗分化期随穗肥施入.结果表明:(1)硅素穗肥促进抽穗期植株养分吸收,提高成熟期干物质量和产量,与Si0相比,Si60平均增产4.3%,Si100平均增产8.6%;(2)硅素穗肥优化了水稻不同部位K+、Na+分配,提高水稻叶片、上部叶鞘、中下部茎秆K+含量,降低穗、上部叶片、叶鞘、茎秆Na+含量,提高各部位的K+/Na+,进而提高离子稳态;(3)硅素穗肥促进叶片大量元素N、P、Ca、Mg和微量元素Fe、Mn的积累,与Si0相比,硅素穗肥显著提高了16.5%的P含量、18.5%的Mg含量、22.4%的Ca含量、19.8%的Fe含量,缓解盐碱胁迫对水稻叶片的不利影响.综上所述,硅素穗肥优化了盐碱胁迫下水稻矿质元素的吸收分配,减轻幼嫩器官盐胁迫程度,促进叶片多种有益元素积累,促进水稻养分吸收,且100 kg hm–2效果最佳. |
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| AbstractList | 本研究旨在阐明硅素穗肥调控盐碱地水稻抽穗期矿质元素分配的作用机制.以常规粳稻淮稻5号为材料,于2019年和2020年在江苏沿海大丰盐碱地(盐分3.4 g kg–1,pH 8.3)开展大田试验,设置3个硅肥用量(0、60和100 kg hm–2),于幼穗分化期随穗肥施入.结果表明:(1)硅素穗肥促进抽穗期植株养分吸收,提高成熟期干物质量和产量,与Si0相比,Si60平均增产4.3%,Si100平均增产8.6%;(2)硅素穗肥优化了水稻不同部位K+、Na+分配,提高水稻叶片、上部叶鞘、中下部茎秆K+含量,降低穗、上部叶片、叶鞘、茎秆Na+含量,提高各部位的K+/Na+,进而提高离子稳态;(3)硅素穗肥促进叶片大量元素N、P、Ca、Mg和微量元素Fe、Mn的积累,与Si0相比,硅素穗肥显著提高了16.5%的P含量、18.5%的Mg含量、22.4%的Ca含量、19.8%的Fe含量,缓解盐碱胁迫对水稻叶片的不利影响.综上所述,硅素穗肥优化了盐碱胁迫下水稻矿质元素的吸收分配,减轻幼嫩器官盐胁迫程度,促进叶片多种有益元素积累,促进水稻养分吸收,且100 kg hm–2效果最佳. |
| Author | 李伟玮 闫飞宇 陶伟科 周燕 韦海敏 丁艳锋 李刚华 刘正辉 |
| AuthorAffiliation | 南京农业大学农业农村部作物生理生态与生产管理重点实验室, 江苏南京210095;南京农业大学江苏省现代作物生产协同创新中心, 江苏南京210095 |
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| Author_FL | WEI Hai-Min YAN Fei-Yu DING Yan-Feng LIU Zheng-Hui LI Gang-Hua TAO Wei-Ke ZHOU Yan LI Wei-Wei |
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| Keywords | 矿质营养 产量 水稻 盐碱地 硅肥 |
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| Title | 硅素穗肥优化滨海盐碱地水稻矿质元素吸收分配提高耐盐性 |
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