CAJ | 학술논문

以美棉33B为材料，于棉花中部果枝开花时进行渍水7 d和14 d处理，研究花铃期渍水对不同果枝部位棉铃对位叶净光合速率与干物质累积及产量的影响。结果显示，渍水处理棉铃对位叶净光合速率随渍水持续期延长而降低，降幅为中部果枝>上部果枝>下部果枝。渍水后棉花地上部干物质累积降低，水分胁迫指数随果枝部位的上升而增加，下部果枝的干物质分配系数增加，根系、叶片分配系数降低而蕾铃分配系数增加。渍水后棉花产量在不同果枝部位的表现与物质分配结果一致。因此，花铃期渍水降低了棉花净光合速率，致使光合产物减少并改变其在不同果枝及器官间的分配，是不同果枝部位产量降低的物质基础。
이미면33B위재료，우면화중부과지개화시진행지수7 d화14 d처리，연구화령기지수대불동과지부위면령대위협정광합속솔여간물질루적급산량적영향。결과현시，지수처리면령대위협정광합속솔수지수지속기연장이강저，강폭위중부과지>상부과지>하부과지。지수후면화지상부간물질루적강저，수분협박지수수과지부위적상승이증가，하부과지적간물질분배계수증가，근계、협편분배계수강저이뢰령분배계수증가。지수후면화산량재불동과지부위적표현여물질분배결과일치。인차，화령기지수강저료면화정광합속솔，치사광합산물감소병개변기재불동과지급기관간적분배，시불동과지부위산량강저적물질기출。
A waterlogging experiment lasting for 7 d and 14 d was conducted on a cotton cultivar NuCOTN 33B with pool culture to evaluate the influence on photosynthesis, dry matter accumulation and yield during flowering and boll-forming stage. The results were as follows. The net photosynthetic rates of subtending leaves of bolls were reduced over the time of wa-terlogging and the reduction in medium fruit branches of cotton was much more than that in lower and upper fruit branches. The dry matter weight in aboveground part of cotton decreased under waterlogging stress and the stress index increased with the rise of fruit branch position and waterlogging duration. The dry matter distribution coefficient increased in lower fruit branch, and buds and bolls, but decreased in roots and leaves. The performance of lint yield were consistent with that of dry matter distribution. In summary, waterlogging reduced the accumulation of assimilates due to decreased photosynthesis and al-tered its distribution among fruit branches and organs, which may contribute to the decrease in lint yield.