以盐生植物盐角草（Salicornia europaea）为材料，以NaCl模拟不同盐度环境，盆栽试验了氮（0.3 g·kg-1，N1；0.6 g·kg-1，N2；1.2 g·kg-1，N3；2.4 g·kg-1，N4），盐（2.5 g·kg-1，S1；5.0 g·kg-1，S2；7.5 g·kg-1，S3）处理对其生长发育及氮素吸收利用的影响。结果表明：（1）不同盐度下施氮均可以显著促进盐角草的生长，地上部干质量均在N2处理下达到最大，而株高均在N1时达到最高，且施氮对盐角草生长的影响与盐度有关；（2）不同盐度环境下施氮所能达到的最高干物质产量及最高施氮限量不同，表现为S312，随着施氮量的增加，氮素生产力与氮素农学利用效率均表现出下降的趋势；（3）施氮显著增加了盐角草各器官含氮量及氮吸收量，同一施氮水平下盐角草各器官含氮量及氮吸收量均表现为同化枝>茎>根；（4）同一施氮水平下，随着盐度的增加，盐角草同化枝渗透势显著下降，同一盐度环境下，随着施氮量的增加，同化枝渗透势呈现出下降趋势，渗透调节能力增大；（5）3个盐度环境下，施氮均增加盐角草同化枝光合色素含量，从而提高光合效率，增强其对盐渍环境的适应能力。
Effects of nitrogen concentration (0.3 g·kg-1,N1;0.6 g·kg-1,N2;1.2 g·kg-1,N3;2.4 g·kg-1,N4) and salinity (2.5 g·kg-1,S1;5.0 g·kg-1,S2;7.5 g·kg-1,S3) on growth, nitrogen uptake and utilization of Salicornia europaea were studied by experiment of potted plant. The results showed that: (1) Application of nitrogen could promote the growth of S. europaea, the dry weight reached the maximum when nitrogen application was N2 and plant height reached the maximum when nitrogen application was N1, and effect of nitrogen application on growth of S. europaea seedlings was related the salinity; (2) The highest nitrogen application rate and the most dry matter achieved by nitrogen application was difference in different salinity, it showed that S312, nitrogen productivity and nitrogen use efficiency decreased with the increase of nitrogen application; (3) Nitogen application significantly promoted the increase of nitrogen content and nitrogen uptake of S. europaea organs, and nitrogen content and nitrogen uptake of S. europaea organs showed that shoot>stem>root at a same nitrogen level; (4) Assimilating branches osmotic potential of S. europaea decreased with increasing salinity in the same nitrogen level, and assimilating branches osmotic potential of S. europaea decreased with increasing nitrogen application in the same salinity and the osmotic adjustment ability increased; (5) Application of nitrogen could increase photosynthetic pigments content of S. europaea assimilating branches and improve photosynthetic efficiency, and strength the adaptability to salt environment.
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