| 灌浆期断根对小麦衰老进程的影响 |
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| 引用本文： | 郭翠花,高志强.灌浆期断根对小麦衰老进程的影响[J].山西农业大学学报(自然科学版),2007,27(2):158-162. |
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| 作者姓名： | 郭翠花 高志强 |
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| 作者单位： | 山西农业大学,农学院,山西,太谷,030801 |
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| 摘 要： | 以灌浆初期大田小麦为试验材料,研究了不同层次断根对小麦生育后期的影响。结果表明,(1)断根明显降低产量,表现为断根越浅,影响越大。断根后浇水处理性状表现都优于相应的不浇水处理。(2)在断根后,不浇水条件下,断根深度10 cm、20 cm、40 cm、60 cm、80 cm和100 cm分别比不断根减产46.2%、43.3%、33.3%、25.4%、18.6%和14.2%;在浇水条件下,相应断根减产少于不浇水的。(3)小麦各个层次的根系都有其特定功能,任何层次断根都会使其合成和运输功能改变,甚至100 cm以下的深层根系在生育后期仍然起重要作用。(4)灌浆期断根加速小麦的衰老,干旱促进小麦的衰老进程,充足的水分对延缓小麦后期的衰老进程有一定的作用。
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| 关 键 词： | 小麦灌浆期 断根 叶绿素 丙二醛 衰老进程 |
| 文章编号： | 1671-8151(2007)02-0158-05 |
| 修稿时间： | 2006年9月25日 |
Effects of Pruning Root on Senescence of Winter Wheat in Filling Stage |
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| GUO Cui-hua.Effects of Pruning Root on Senescence of Winter Wheat in Filling Stage[J].Journal of Shanxi Agricultural University,2007,27(2):158-162. |
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| Authors: | GUO Cui-hua |
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| Abstract: | With the experimental materials of field wheat of filling stage,the treatment of root pruning was done in filling periods on wheat.Study on not only the changes of chlorophyll content in the second retrorse leaf and MDA changes in root,but also effects of filling rate,yield of wheat and correlated traits.The results showed that root of wheat was pruned in the first period of filling stage from different depth,yield of wheat was decreased distinctly and the more lower the more shallower pruning root course.After pruned roots and in the condition of non-irrigating treatments,the root was pruned from the depth of 10 cm 、20 cm、40 cm、60 cm、80 cm and 100 cm,the yield of wheat separately decreased 46.2%、43.4%、33.4%、25.5%、19.0% and14.3% than which of no treatment of the root in the same period;while in the condition of irrigating treatments decreased yield was lower than which of non-irrigating treatments.Different depth roots have their special function.Any depth pruning root could change anabolism and transportation function.Specially,the deeper root of 100 cm has important function: Pruning root together with non-irrigation accelerates senescence of wheat,but enough water may compensate damage from pruning root and retard senescence of wheat.So,constructing strong root system may prevent senescence of wheat,and get higher yields. |
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| Keywords: | The filling stage of wheat Pruning root Chlorophyll MDA The senescence process |
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