Sea level rise induced-salinization is lowering coastal soils productivity. In order to assess the effects that increased salinity may provoke in terrestrial plants, using as model species: Trifolium pratense, Lolium perenne, Festuca arundinacea and Vicia sativa, two specific objectives were targeted: i) to determine the sensitivity of the selected plant species to increased salinity (induced by seawater-SW or by NaCl, proposed as a surrogate of SW) and, ii) to assess the influence of salinization in total biomass under different agricultural practices (mono- or polycultures).

The four plant species exhibited a higher sensitivity to NaCl than to SW. Festuca arundinacea was the most tolerant species to NaCl (EC_{50,seed germination} and EC_50,growth of 18.6 and 10.5 mScm⁻¹, respectively). The other three species presented effective conductivities in the same order of magnitude and, in general, with 95% confidence limits overlapping. Soil moistened with SW caused no significant adverse effects on seed germination and growth of L. perenne. Similar to NaCl, the other three species, in general, presented a similar sensitivity to SW exposure with EC_{50,seed germination} and EC_50,growth within the same order of magnitude and with confidence limits overlapping.

The agricultural practice (mono-vs polyculture) showed some influence on the biomass of each plant species. When considering total productivity, for aerial and root biomass, it was higher in control comparatively to salinization conditions. Under salinization scenarios, the practice of polyculture was associated with a higher aerial and root total biomass than monocultures (for instance with combinations with T. pratense and F. arundinacea). These results suggest that the effects of salinization on total productivity may be minimized under agricultural practices of polyculture. Thus, this type of cultures should be encouraged in low-lying coastal ecosystems that are predicted to suffer from salinization caused by seawater intrusions.

海平面上升引起的盐碱化正在降低沿海土壤的生产力。为了评估盐度增加可能对陆地植物引起的影响，使用以下物种作为模型物种：三叶草，黑麦草，无花金合欢和野豌豆，两个具体目标是：i）确定所选植物物种对植物的敏感性盐度增加（由海水SW或NaCl诱导，被提议作为SW的替代物）；以及ii）在不同的农业实践（单一栽培或混养）下评估盐化对总生物量的影响。

这四种植物对NaCl的敏感性高于对SW的敏感性。Festuca arundinacea是最耐NaCl的物种（EC _{50，种子发芽}和EC _{50，生长分别}为18.6和10.5 mScm ^-1）。其他三个物种表现出相同数量级的有效电导率，并且通常具有95％的置信度范围重叠。SW湿润的土壤对L. perenne的种子萌发和生长没有明显的不利影响。与NaCl相似，其他三种物种对EC _{50（种子发芽）}和EC _{50（生长）的}SW暴露表现出相似的敏感性。 在相同的数量级内，并且置信限重叠。

农业实践（单对混养）对每种植物的生物量都有一定影响。当考虑总生产力时，相对于盐渍化条件而言，气生和根生物量的控制性更高。在盐碱化的情况下，与单培养相比，混养与更高的气生和根总生物量相关（例如，与T. pratense和F. arundinacea结合使用）。这些结果表明，在混养的农业实践中，盐碱化对总生产率的影响可以减至最小。因此，应在低洼的沿海生态系统中鼓励这种文化，因为沿海生态系统预计会遭受海水入侵造成的盐碱化。