| 水分胁迫和氮素有限亏缺对小麦拔节期某些生理特性的影响 |
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| 引用本文： | 曹翠玲,李生秀.水分胁迫和氮素有限亏缺对小麦拔节期某些生理特性的影响[J].土壤通报,2003,34(6):505-509. |
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| 作者姓名： | 曹翠玲 李生秀 |
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| 作者单位： | 1. 西北农林科技大学生命科学学院,陕西,杨凌,712100
2. 西北农林科技大学资源与环境科学学院,陕西,杨凌,712100 |
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| 基金项目： | 国家自然基金重大项目(49890330)国家重点基础研究专项经费(G1999-011707),重点基金项目(30230230)农业倾斜项目(30070429)和面上基金(40201028)资助 |
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| 摘 要： | 在营养液培养条件下,研究了水分轻度胁迫、氮素有限胁迫对冬小麦小偃22拔节期NR活性、根系活力等生理特性、养分累积及小麦产量的影响。结果表明,水分、氮素亏缺使叶绿素含量及叶片NR活性低于对照水平,根系活力,K3Fe(CN)6还原活性降低;水分胁迫影响大于氮素亏缺影响,水分和氮素亏缺之间有显著地交互作用。水分胁迫下,小麦植株地上部氮、磷、钾含量高于对照水平,但根系含量降低;氮素亏缺下,地上和根系的养分含量均低于对照水平;水分和氮素之间有极显著地交互作用。拔节时期水分、氮素亏缺使小麦成熟期的产量降低。
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| 关 键 词： | 小麦 拔节期 水分胁迫 养分胁迫 生理特性 养分吸收 |
| 文章编号： | 0564-3945(2003)06-0505-05 |
| 修稿时间： | 2002年12月18 |
Effect of Water Stress and Nitrogen Deficiency on Some Physiological Charicteristics and Wheat Yeild at the Jointing Stage |
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| Abstract: | We studied the effect of water stress and nitrogen deficiency on some physiological characteristics and yield of wheat at the jointing stage.The experiment results showed as follows:under the water stress and the nitrogen deficiency,the content of chlorophyll and activities of nitrate reductase were lower compared with the control,activity of root and reduction of K3Fe(CN)6 decreased,and the effect of water stress was grater than the effect of nitrogen deficiency.Under the water stress,the content of nitrogen,phosphate and potassium increased in the shoot,but deereased in the root.Water stress and nitrogen deficiency at the stage of jointing affected the yield of wheat. |
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| Keywords: | Wheat Jointing stage Water stress Nitrogen deficient Physiological characteristics Nutrients absorption |
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