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1987～1988年,分别在大田和遮雨塑料棚条件下,测定并分析了三个抗性不同的夏玉米杂交种与干旱适应性有关的一些生理特性.结果表明,夏玉米杂交种受旱后,对干旱均表现出了程度不同的适应性;高抗杂交种以较强的根系活力、气孔调节能力和广泛的水分适应性体现其抗旱性,在耐旱性上则主要表现为受害后叶绿素含量较稳定,膜损伤小,游离脯氨酸积累量大.二者综合作用的结果、使其抗旱系数大,经济产量高.此外,还对夏玉米抗旱机理以及气孔扩散阻力、游离脯氨酸积累与抗旱性的关系进行了初步探讨.
From 1987 to 1988, some physiological traits related to drought adaptability of three summer maize hybrids were determined and analyzed under field and shelter conditions respectively. The results showed that after the summer maize hybrids were affected by drought , Showed different degrees of adaptability to drought; high resistance hybrids with strong root activity, stomatal regulation and a wide range of water adaptability to reflect its drought resistance, but mainly in the drought tolerance of chlorophyll after injury More stable, less membrane damage and larger accumulation of free proline.The results showed that the drought resistance coefficient and the economic yield of summer maize were higher than those of the control.The drought resistance mechanism of summer maize and the effects of stomatal diffusion resistance, free proline The relationship between accumulation and drought resistance was discussed.