【摘要】 采用盆栽试验系统研究了不同酸、磷处理下玉米自交系苗期生物学及营养学特性.结果表明,低磷和酸铝严重抑制玉米植株的生长,低磷胁迫下植株干重受影响较大,酸铝对下部叶叶色和干重影响显著.低磷处理抑制玉米植株对K、Ca的吸收,酸铝胁迫使各自交系P、K、Ca、Mg含量显著下降,加磷可缓解酸铝对玉米生长的毒害作用.不同自交系之间存在耐低磷和耐酸铝基因型差异,并且耐低磷和耐酸铝之间存在一定的关系.自交系M12属于酸铝低磷双敏感类型;耐酸铝自交系,如M02和M08同样耐低磷,耐低磷自交系M01也较耐酸铝,为双耐基因型.更多还原

【Abstract】 Aluminum (Al) toxicity and phosphorus (P) deficiency often coexist in acid soils that severely limit crop growth and production, including maize. A series of pots were used to study the characteristics of growth and uptake of various nutrient elements at maize seedling stage under different acid and P treatments. The results demonstrated that P deficiency and acid stress severely hindered the growing of maize. P deficiency had a negative influence on biological traits, especially on plant dry matter weight. The low P severely affected the absorbing of K and Ca. The stresses of acid and aluminum could significantly decrease the absorbing of P, K, Ca and Mg. P addition significantly increased Al tolerance in all genotypes differing in acid tolerance. It was also found that there were some relationships between low-P tolerance and acid tolerance. M12 is a sensitive line to both acid-aluminum stress and low P stress. The acid and aluminum tolerant lines M02 and M08 showed the same tolerance to low P, whereas the low P tolerant line M01 had tolerance to acid and aluminum stresses to some extend, and they are the tolerant lines to the both stresses.更多还原