CAJ | 학술논문

采用盆栽方法,通过设置不同的水分处理,研究水分胁迫对夏玉米生长发育的影响.从根、茎秆、叶、叶鞘、雌穗等器官水平上考察水分胁迫对夏玉米物质积累、分配等的影响,以及不同水分处理下各器官对夏玉米干物质积累的贡献率.分析发现,不同水分条件下,叶片、茎秆和叶鞘三者是干物质积累的重要来源,在灌浆期以前,叶片是最主要的干物质积累器官.在灌浆前后期,叶片所占的比重分别为22%,21%;茎秆也是夏玉米干物质积累的来源之一,在抽雄初期,T_3茎秆占总重的26%,在抽雄后期T_4茎秆比重为30%.茎秆在吐丝期和灌浆后期的比重分别为24%和23%,而水分胁迫(T_8)的叶鞘比重分别为21%和18%;在生殖生长阶段,植株对水分胁迫非常敏感;水分胁迫下有利于干物质的快速积累,即缩短灌浆期.
채용분재방법,통과설치불동적수분처리,연구수분협박대하옥미생장발육적영향.종근、경간、협、협초、자수등기관수평상고찰수분협박대하옥미물질적루、분배등적영향,이급불동수분처리하각기관대하옥미간물질적루적공헌솔.분석발현,불동수분조건하,협편、경간화협초삼자시간물질적루적중요래원,재관장기이전,협편시최주요적간물질적루기관.재관장전후기,협편소점적비중분별위22%,21%;경간야시하옥미간물질적루적래원지일,재추웅초기,T_3경간점총중적26%,재추웅후기T_4경간비중위30%.경간재토사기화관장후기적비중분별위24%화23%,이수분협박(T_8)적협초비중분별위21%화18%;재생식생장계단,식주대수분협박비상민감;수분협박하유리우간물질적쾌속적루,즉축단관장기.
The effects of water stress on dry-matter accumulation and distribution for summer maize Ludan 981 were studied including the different organs from tasseling stage to flowering period using potted method under different water condition, such as roots, stems, leaves, leaf sheath, ears, tassels and so on, and also the contribution ratio of these organs to the total output. The main results were as follows. Leaves, stems and leaf sheath were the very important resources for dry-matter accumulation under different water stress, and leaves were the most important organs for the dry-matter accumulation before the seed filling stage. During the early and late seed filling stage, the proportions of the leaf contribution ratio were 22% and 21%. The stems were also one of the resources of dry-matter accumulation. At the early seed filling stage, the proportion of the T_3 stem contribution ratio was 26%, while that of T_4 is 30% at the late tasseling stage. In the silking stage and the late seed filling stage, the proportions of the stems contribution ratio were 24% and 23% ,and the proportions of leaf sheath contribution ratio were 21% ,18% respectivey. During the generative growth phase, summer maize was very sensitive to water stress. It was very beneficial to the rapid accumulation of dry matter, that is, the conditions of water stress can shorten the period of the seed filling stage.