不同施肥量·烤烟成熟度生化指标及农艺性状·产量的变化

Study on Biochemical Indexes,Agronomic Traits and Yield Changes of Flue-cured Tobacco under Different Fertilization

[目的]对不同烤烟品种成熟度与活性氧代谢的关系进行研究,进而探讨烟叶的成熟机理和最适成熟度指标。[方法]在不同施肥量下,测定了3个烤烟品种的不同部位鲜烟叶叶绿素含量和超氧化物歧化酶活性、丙二醛含量、脯氨酸含量以及采后株高、烤后产量。[结果]施肥量影响烟叶的生长发育和产质量。不同品种烟叶成熟时,清除活性氧自由基和抵抗膜脂过氧化变化不同。在成熟过程中,脯氨酸含量基本上呈现两头高中间低的船形变化。[结论]由于优质烟生长、发育规律与生态条件相对固定,肥料形态、种类和施用水平就成为协调三者之间关系的重要手段。

[ Objective] The relationship of maturity of different varieties of flue-cured tobacco and the metabolism of reactive oxygen species was studied. And the maturity mechanism and the indexes of optimal maturity were probed into. [Method] The content of the chlorophyll, superoxide dismutase activity, MDA content, the content of proline and post-harvest height, grilled production of three varieties of flue-cured tobacco in different parts of fresh tobacco leaf under the condition of different fertilization amount were determined. [Result] The growth and production and the quality of tobacco were influenced by the fertilization amount. When different varieties of flue-cured tobacco were ripening, the change of scavenging of reactive oxygen radicals and the resis- tance of membrane lipid peroxidation was different. And the content of proline changed like boat-shaped basically in the maturing process. [Conclusion] Forms and species of the fertilizer and utilization level were important to harmonizer, because the growth and development regularity and the ecological condition were stable relatively.