通气状况与氮素形态对水稻和旱稻生长的影响

采用营养液培养法研究通气状况与氮素形态对水、旱稻生长和养分吸收的影响。结果表明，通气与不通气相比，通气明显的增加了植物地上部和地下部的生物量；同时验证了水稻喜NH4^ 和旱稻喜NO3^-的吸收特性。叶面积测定与地上部生物量的趋势完全一致，表明这种生物量的增加与光合作用增强、光合面积增大有关。植物地上部全N、P、K含量测定显示，通气状况与氮素形态对水、旱稻生物量的影响与N、P、K营养元素的吸收没有直接关系。

THE EFFECT OF VENTILATION AND N-FORM ON GROWTH OF LOWLAND AND UPLAND RICE

In culture solution experiment,we have studied that ventilation and N-form affect biomass of lowland and upland rice.The results showed the biomass of plants increases when enough ventilation is given.At the same time,the characteristics were verified that the lowland rice prefers NH + 4 to NO - 3 in contrast with the upland rice.Leaf area is identical to the biomass of the plants.With the biomass of the plant increasing,photosynthesis and photosynthetic area increased.N?P?K content of the shoot implied that the effect of ventilation and N-form on the biomass of the lowland and upland rice is not directly correlative with the uptaking of N?P?K.