持续淹水对小麦养分吸收动态和产量的影响

为了研究持续淹水对小麦养分吸收动态和产量的影响，以沿淮低洼地砂姜黑土上的小麦为研究对象，共设6个处理，每个处理埋相应的根袋，在小麦生拔节期持续淹水9天，每天收取根袋，淹水结束后统一采集各处理的植株样。淹水严重影响了小麦的生长发育，降低生物量，减少产量，淹水时间越长，下降和减产也越严重；持续性淹水严重阻碍了小麦对氮、磷、钾的吸收，降低了地上部分氮素含量和累积量，经t检验与对照相比差异均达显著或极显著水平。淹水严重影响了小麦的生长发育，抑制了氮、磷、钾的吸收与积累，使生物量、产量有较大幅度的下降。

The Effect of Persistent Flooding on the Kinetic Nutrient Absorption and Output of Wheat

The aim was to study the effect of persistent flooding on the nutrient absorption and output of wheat. The experiments were performed on the lime concretion black soil of the original soil column, installing six treatments, each treatment burying the corresponding root bags. In the jointing stage of wheat, the subject was flooded continually by nine days. During those days, the root bags were collected each day. Overall measurement was sampled by uniform of the stalks after the flood. The wheat growth was significantly suppressed by water-logging with a lower biomass and subsequently, a decreased output. Besides, the decrease of output varied in proportion to the flooding time. Persistent submergence damaged the ability of wheat to absorb nitrogen, phosphorus, and potassium, and consequently, caused the decrease of nitrogen content and biomass. Compared with the result of control according to the t-test, the effect of flooding is significant or greatly significant. Flooding exerted a great passive impact upon the growth of wheat. It was found that the absorption and accumulation of nitrogen, phosphorus, and potassium were significantly inhibited, causing the decrease of biomass and output to an impressive degree.