| 泡桐一年生埋根苗生长及同化产物分配的研究 |
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| 引用本文： | 朱建军.泡桐一年生埋根苗生长及同化产物分配的研究[J].河南农业大学学报,1988(4). |
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| 作者姓名： | 朱建军 |
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| 作者单位： | 河南农业大学 八五级研究生 |
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| 摘 要： | 对泡桐一年生埋根苗生长、干物质积累、储存/结构分配、同比物分配等规律进行了定量研究。并结合不同群体结构的研究,优化了育苗密度。研究结果表明:在年生长周期中,泡桐一年生埋根苗的叶面积增长和干物质积累规律均符合Logistic 方程,净同化率和比叶面积为单峰曲线,相对生长率和叶面积比随着时间的推移逐渐减小,储存/结构分配的变化规律与净同化率一致:而同化物的分配在各生长时期不同,生长初期主要分配给根系和叶片,速生期主要分配给叶片和茎,生长后期主要分配给茎和根系.同时,地上部分和地下部分的生长和分配具有交替节律性。密度影响单株叶面积、叶片的解剖结构和光能的分布,从而影响净同化率。随着密度的增大,净同化率降低,单株生物量减小。密度对储存/结构的分配没有显著影响,但它影响同化物在各器官间的分配。通过优化方法,确定育苗密度以每亩555株为最佳.
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| 关 键 词： | 泡桐 生长 (?)物质积累 储存/结构分配 同化物分配 |
Studies on the Growth,Partitioning of Assimilates,in One Year Seedlings of Paulownia |
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| zhu Jianjun.Studies on the Growth,Partitioning of Assimilates,in One Year Seedlings of Paulownia[J].Journal of Henan Agricultural University,1988(4). |
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| Authors: | zhu Jianjun |
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| Institution: | zhu Jianjun |
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| Abstract: | The paper studies quantitatively the law of growth,accumulation of drymatter,storage/structure partitioning and partitioning of assimilates in oneyear seedlings of paulownia,The results show that in a period of annual grow-th the law of growth in leaf area and accumulation in dry matter accord withlogistic equation,the net assimilation rate(NAR)and the specific leaf area(SLA)emerge peak curves,the relative growth rate(RGR)and leaf area rat-io(LAR)fall with the passage of time,and the changing law of storage/stru-cture with time corresponds to the NAR.The partitioning of assimilates v-aries in different growth period of the year.The density of raising seedlingshas an obvious influence on the leaf areas of individuals,the anatomist struc-ture of leaves and the distribution of optical energy,thus affecting the NAR.By means of optimization methods the appropriate density of raising seedlingsis 555 saplings per mu. |
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| Keywords: | paulownia growth accumulation of dry matter storage/structure partitioning partitioning of assimilates |
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