摘 要 ：选用郑单958(ZD958)和登海605(DH605)为试验材料，在大田条件下研究淹水对夏玉米氮、磷、钾养分吸收与运转特性的影响。结果表明，淹水胁迫显著降低夏玉米的氮、磷、钾养分积累量，三叶期淹水6 d 对其影响最显著，ZD958和DH605成熟期的氮、磷、钾养分积累量较CK分别减少了50.55%、36.50%、27.21%和42.86%、45.50%、32.53%。淹水胁迫后各器官的养分积累量较CK显著降低，但茎秆和叶片中养分的分配比例较CK升高，籽粒的养分分配比例显著下降，且茎秆和叶片中的养分含量较CK升高，而籽粒中的养分含量较CK显著下降；淹水胁迫后夏玉米各器官的干物质积累量显著降低，三叶期淹水6 d对其影响最显著，ZD958和DH605成熟期的茎秆、叶片、籽粒的干重较CK分别下降25.93%、30.14%、43.39%和28.28%、32.27%、50.28%。淹水胁迫后茎秆和叶片中的养分积累量的降低主要是由于淹水胁迫后干物质积累量显著降低，茎秆和叶片的养分向籽粒的转移量显著降低。三叶期淹水的影响最显著，拔节期淹水次之，开花后10 d淹水影响较小，其影响随淹水胁迫时间的延长而加剧。
Abstract:Two summer-maize hybrids, Zhengdan958 (ZD958) and Denghai605 (DH605), were selected as experimental materials. A field experiment was performed to explore the effect of waterlogging on nitrogen (N), phosphorus (P) and potassium (K) absorption and transport of summer maize. Results show that N, P and K accumulation amounts are reduced significantly after waterlogging, and the decreases of nutrient accumulation of two cultivars are the most in the treatment of waterlogging at the threeleaf stage for 6 d, with 42.86%, 45.50% and 32.53% in ZD958 and 50.55%, 36.50% and 27.21% in DH605. The nutrient accumulation amounts of each organ and nutrient allocation proportions of grain are decreased significantly after the waterlogging, while the nutrient allocation proportions of stem and leaf are increased. The nutrient contents of stems and leaves are increased, while the nutrient contents of grains are decreased. Furthermore, each organ’s dry matter accumulation is reduced significantly after the waterlogging, and the decreases of two cultivars are the most at the treatment of the waterlogging at the three-leaf stage for 6 d. At the maturity, the dry matter weights of stem, leaf and grain of ZD958 are decreased by 25.93%, 30.14% and 43.39, and the dry matter weights of leaves and grains of DH605 are decreased by 28.28%, 32.27% and 50.28%. The reductions of stem and leaf nutrient accumulation after the waterlogging are mostly due to the decrease of dry matter accumulation, and the nutrient transfer from stems and leaves to grains is decreased significantly after the waterlogging. It is most sensitive to be waterlogged at the three-leaf stage, followed by the six-leaf stage and the 10 th day after the flower stage, and decreased with the increase of waterlogging duration.