【摘要】 对黄河三角洲一些常见树种和引进的耐盐树种进行了脯氨酸含量、叶片自由水—束缚水含量、相对电导率、叶片和根部部分元素含量等生理指标进行了测定 ,并在此基础上 ,分析、讨论了K+ 、Ca2 + 、Mg2 + 等离子在树木抗盐方面的作用。不同树种的Na+ /K+ 、Na+ /Ca2 + 、Na+ /Mg2 + 比值在叶片和根部有所不同 ,它们在叶片和根部的变化 ,反映了植物对盐分离子与营养元素相对的吸收状况及抗盐能力更多还原

【Abstract】 The measurement of physiological indicators of salinity tolerance for trees grow n in Yellow River Delta was conducted, including proline content, free-water & b ound-water percentage, relative conduction rate of plant tissues and elements co ntent in leaves and roots. The functions of ions such as K +, Ca 2+ and Mg 2+ on salinity tolerance were discussed. The ratios of Na +K +、Na +C a 2+ 、Na +Mg 2+ in leaves and roots were various with tree species, which reflected the abilities of trees to tolerate salts and uptake nutrients.更多还原