| 杂交水稻与稗草种间竞争的优势表现 Ⅰ.水稻与稗草混播栽培的生理生态特性(英文) |
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| 引用本文： | 林文雄,姚文辉,陈德禄,郭玉春,梁义元. 杂交水稻与稗草种间竞争的优势表现 Ⅰ.水稻与稗草混播栽培的生理生态特性(英文)[J]. 福建农林大学学报(自然科学版), 1998, 0(3) |
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| 作者姓名： | 林文雄 姚文辉 陈德禄 郭玉春 梁义元 |
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| 作者单位： | 福建农业大学作物科学学院，福建省农业厅植保站，福建省莆田市农科所 |
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| 摘 要： | 试验结果表明，与常规稻相比，稗草具有一般杂草的生长特性，即具有前期生长优势、后期生长劣势之特性。这与稗草从种子萌发至三叶期前的异养阶段，植株体内α 淀粉酶活性强和自养阶段初期叶片净同化率高有关。但杂交稻在种子萌发期间（３１２ｄ）和大田自养阶段叶片净同化率均显著高于常规稻和稗草，具有较强的种间竞争优势，特别是在水稻与稗草生长初期，这种种间竞争优势更加明显，表明杂交稻的产量优势也与其它作物—杂草生态系统中保持较强的竞争优势有关。
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| 关 键 词： | α-淀粉酶；稗草；杂种优势；种间竞争；水稻 |
Heterotic performance of rice in competitiveness with barnyardgrass Ⅰ.Physioecological characteristics of rice and barnyardgrass ( Echinochloa spp) in mixtures |
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| Lin Wenxiong Yao Wenhui Chen Delu Guo Yuchun Liang Yiyuan. Heterotic performance of rice in competitiveness with barnyardgrass Ⅰ.Physioecological characteristics of rice and barnyardgrass ( Echinochloa spp) in mixtures[J]. Journal of Fujian Agricultural and Forestry University, 1998, 0(3) |
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| Authors: | Lin Wenxiong Yao Wenhui Chen Delu Guo Yuchun Liang Yiyuan |
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| Affiliation: | Lin Wenxiong 1 Yao Wenhui 2 Chen Delu 3 Guo Yuchun 1 Liang Yiyuan 1 |
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| Abstract: | The results indicated that barnyardgrass had growth vigor at earlier stage, resulting from high α amylase activity at heterotrophic stage and larger leaf area expansion with high net photosynthetic rate at earlier autotrophic stage, but performed week growth at late growth phase, showing the general weed characteristics compared with inbred rice under the condition of monoculture. But α amylase activity and net photosynthetic rate in hybrid rice tended to be significantly higher than that of the weed, displaying heterosis for the 2 physiological traits in the germinating change courses (3-12 d) and autotrophic phase respectively. Accordingly, hybrid rice Shanyou 63 is expected to show its heterotic effect especially at early growing stage in mixtures. |
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| Keywords: | α amylase activity barnyardgrass heterosis interspecific competition rice |
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