中文摘要：

采用水培方法研究不同浓度NaCl对耐盐玉米（澄海11）、普通玉米（扬糯1号）幼苗K^＋、Na^＋、和NO3^-吸收速率的影响。结果表明：盐胁迫对2个玉米品种K＋、NO3-吸收均有影响,但影响的程度不同。耐盐玉米在正常条件下对Na^＋、NO3^-、K^＋吸收速率均小于普通玉米,表明耐盐品种体内对养分的利用程度可能较普通品种更高;盐胁迫时,耐盐玉米对NO3^-、K^＋吸收速率下降较小,仍能保持相对于不耐盐品种更高或相近的吸收速率,能较好地维持体内养分间的平衡,从而提高对盐胁迫的抵抗力。

英文摘要：

The effects of salt stress on plants involve not only the water stress caused by low osmotic potential, but also the metabolic disorder in cells by breaking the ion balance in plants. The cation that plants absorb most is K^＋ , while the anion that plants absorb most is NO3^- Which functions for the balance of electric charge. Therefore, when NaCl influences the K^＋absorption, it is possible that NO3^- uptake changes at the Same time. This paper used the solution culture method to explore the effects of different concentration NaCl on the uptake rates of K^＋ , Na^＋ , NO3^- of maize seedlings and to compare the responses of a salt tolerant variety （Denghai 11） and a salt sensitive variety （Yangnuo 1）. The results showed that salt stress affected the absorption of NO3^- and K^＋ , and maize varieties with different tolerance ability to salt stress represented different responses. The salt tolerant maize at normal condition had smaller uptake rates of Na^＋, NO3^-, K^＋ than the salt sensitive maize, which meant that the salt tolerant variety might have higher utilization efficiency of nutrients. On the other hand, under salt stress the uptake rate of NO3^-, K^＋ by the salt tolerant variety was less reduced and could still keep the similar or even higher uptake rate of nutrients, especially for NO3^-, than the sensitive variety, that is to say, the salt tolerant variety could maintain the balance of nutrients in plants and consequently improve its tolerance to salt stress.