| 密度和追肥时期对大穗型小麦14C-同化作用及其分配的调控效应 |
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| 引用本文： | 赵会杰,邹琦,郭天财,于振文,董中东,冯春叶. 密度和追肥时期对大穗型小麦14C-同化作用及其分配的调控效应[J]. 核农学报, 2003, 17(1): 67-72 |
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| 作者姓名： | 赵会杰 邹琦 郭天财 于振文 董中东 冯春叶 |
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| 作者单位： | 河南农业大学国家小麦工程技术研究中心,河南,郑州,450002;山东农业大学,山东,泰安,271018 |
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| 基金项目： | 国家重点基础研究专项经费(G1998010100)和河南省自然科学基金(9904011900)资助 |
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| 摘 要： | 本研究结果表明 ,挑旗期叶片 (尤其是旗叶和倒 2叶 )是大穗型品种兰考 90 6最主要的同化器官 ,其同化量占单茎总同化量的 90 %以上 ,而叶鞘的同化量仅占1 0 %以下。密度过大不但抑制14 C 同化速率 ,而且降低14 C 同化物运输分配效率。适当推迟追肥有利于提高单茎同化量和同化物的运输分配效率。
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| 关 键 词： | 小麦 大穗型 密度 14C-同化 同化物分配 |
| 文章编号： | 1000-8551(2003)01-067-06 |
| 收稿时间： | 2009-12-31 |
| 修稿时间： | 2001-05-14 |
REGULATING EFFECT OF DENSITY AND TOP-DRESSING TIME OF NITROGEN FERTILIZER ON ~(14 ) C-ASSIMILATION AND DISTRIBUTION OF ASSIMILATE OF LARGE-SPIKE CULTIVAR OF WHEAT |
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| Abstract: | The results of present study indicated that laminas, especially first and second lamina from top, were the most important assimilating organs of large|spike cultivar of wheat at flag leaf stage. More than ninety percent of assimilate of a single stem was made by laminas, wihle the assimilate amount of sheathes only accounted for less than 10%. Not only assimilating rate but also transport and distribution efficiency was declined when the density was too high. Deferring top|dressing time of nitrogen fertilizer could increase both assimilate amount and transport and distribution efficiency. |
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| Keywords: | wheat large-spike type density time of fertilization 14 C assimilation zz') href=#> 14 C assimilation distribution of assimilate |
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