| 两个超级杂交水稻品种物质生产的特性 |
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| 引用本文： | 纪洪亭,冯跃华,何腾兵,李云,武彪,王小艳.两个超级杂交水稻品种物质生产的特性[J].作物学报,2013,39(12):2238-2246. |
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| 作者姓名： | 纪洪亭 冯跃华 何腾兵 李云 武彪 王小艳 |
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| 作者单位： | 贵州大学农学院，贵州贵阳550025 |
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| 基金项目： | 本研究由国家自然科学基金项目(31160263), 贵州省科技重大专项计划项目(黔科合重大专项字[2011]6012-1), 贵州省农业科技攻关项目(黔科合NY[2011]3085号)和贵州省科学技术基金项目(黔科合J字[2011]2139号)资助。 |
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| 摘 要： | 定量分析超级杂交水稻若干群体指标的动态特征，以期为其高产栽培提供依据。于2011年和2012年在大田条件下，以超级杂交水稻准两优527、Q优6号和对照品种II优838为试材，通过连续测定干物质和叶面积，建立了水稻群体干物质和相对叶面积指数动态模型，进而以群体干物质和相对叶面积指数模型为基础，分析了超级杂交水稻作物生长率、相对生长率、光合势、净同化率、叶面积比率动态变化特征。结果表明，超级杂交水稻快增期的干物质积累量及其占总生物量的比例均高于对照。作物生长率(CGR)随移栽后时间呈先升高后下降的单峰曲线变化，其快增期的CGR较大。与对照相比，超级杂交水稻相对生长率(RGR)表现出上升快、峰值大、下降快的特点。准两优527在移栽后23 d至成熟期高于对照，Q优6号的RGR在移栽后43 d以前低于对照，移栽后43 d至113 d高于对照，两者在移栽后113 d至成熟期的RGR相差不大。不同水稻净同化率(NAR)随移栽后时间呈先上升后下降的单峰曲线变化，最大NAR出现在移栽后43~53 d。总光合势与快增期光合势及与快增期绿叶面积持续时间均呈极显著正相关。2个超级杂交水稻叶面积比率(LAR)在移栽后23 d至43 d迅速下降，移栽后43 d至73 d缓慢下降，移栽后73 d至成熟期快速下降，其快增期的LAR较大。
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| 关 键 词： | 超级杂交水稻 群体生长率 相对生长率 光合势 净同化率 叶面积比率 动态特征 |
| 收稿时间： | 2013-04-27 |
Dynamic Characteristics of Matter Population in Two Super Hybrid Rice Cultivars |
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| JI Hong-Ting,FENG Yue-Hua,HE Teng-Bing,LI Yun,WU Biao,WANG Xiao-Yan.Dynamic Characteristics of Matter Population in Two Super Hybrid Rice Cultivars[J].Acta Agronomica Sinica,2013,39(12):2238-2246. |
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| Authors: | JI Hong-Ting FENG Yue-Hua HE Teng-Bing LI Yun WU Biao WANG Xiao-Yan |
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| Institution: | Agronomy College of Guizhou University, Guiyang 550025, China |
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| Abstract: | In order to find foundations of high-yield cultivation in super hybrid rice (SHR), we modeled on dynamics of population indexes. A field experiment with two super hybrid cultivars (Zhunliangyou 527, Q you 6) and Control (II you 838) was conducted in 2011 and 2012, and dry matter accumulation (DMA) and leaf area index (LAI) were measured. The dynamic equations of DMA and relative leaf area index (RLAI) were established and the dynamic characteristics of crop growth rate (CGR), relative growth rate (RGR), leaf area duration (LAD), net assimilation rate (NAR), and Specific leaf area (LAR) were analyzed based on the equations. The DMA and its proportion to the total biomass at rapid growth stage were significantly higher than those of Control. In the process of time after transplanting, the tendency of CGR was expressed in a single peak curve, and CGR of two SHR was higher than that of Control in rapid growth stage. The RGR of Zhunliangyou 527 was higher than that of control from 23 d after transplanting to mature period. As compared with the RGR of Control, the RGR of Q you 6 was lower before 43 d after transplanting, higher from 43 d to 113 d after transplanting , and not much difference from 113 d after transplanting to maturity . A significant correlation was observed between gross LAD and LAD at rapid growth stage, and also between gross LAD and duration of LAI at rapid growth stage. Compared with Control, the RGR of SHR showed faster increasing and decreasing, and its peak value was higher. A single peak curve was available for the dynamic changes of NAR with its most high value from 43 d to 53 d after transplanting. The LAR of two SHR decreased fast from 23 d to 43 d after transplanting, moderately from 73 d to mature stage, and slowly from 43 d to 73 d after transplanting stage. The LAR of two SHR was higher in rapid growth stage than that of Control. |
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| Keywords: | super hybrid rice CGR RGR LAD NAR LAR dynamic characteristic |
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