烟草配方肥增效剂对烤烟根系内源激素和多胺含量的影响

本试验研究了烟草配方肥增效剂对进入成熟期后烟株根系内源激素含量和多胺含量以及烟叶产量和产值的影响.结果表明,施用配方肥增效剂可提高烟株根系内赤霉素(GA3)、生长素(IAA)和精胺含量,降低脱落酸(ABA)和腐胺含量,其中精胺含量随着肥料用量的减少而增加.前期,配方肥增效剂对根系内亚精胺含量的影响很小,但后期会导致亚精胺含量迅速增高.增效剂对根系内源激素含量和多胺含量的影响以每株施用45.45g配方肥和0.4545g增效剂处理效果最好.施用增效剂能提高烟叶的产量和产值,减少肥料用量的增效剂处理虽降低了烟叶产量,但因改善了烟叶品质而提高其产值,增效剂对烟叶产量和产值的影响以每株施用36.36g配方肥和0.4545g增效剂处理效果最好.

Effect of tobacco formulated fertilizer synergist on the contents of endogenous phytohormones and polyamine in flue-cured tobacco root system

The effect of tobacco formulated fertilizer synergist on the contents of endogenous phytohormones and polyamine in the root system of maturing flue-cured tobacco was investigated, and yield and output value of the tobacco leaf analyzed. Results show that tobacco formulated fertilizer synergist increases GA_{3, IAA and spermine contents, but decreases ABA and putrescine contents. Furthermore, decreasing application of tobacco formulated fertilizer synergist enhances spermine content in flue-cured tobacco. At the early stage, synergist has little impact on the content of spermidine. However, spermidine content increases rapidly at the late stage. 45.45 g tobacco formulated fertilizer with 0.454 5 g synergist treatment produces the best effects on endogenous phytohormones and polyamine contents. The yield and output value of tobacco leaf increase by application of tobacco formulated fertilizer synergist. Although tobacco leaf yield reduces with the use of synergist and decreasing amount of tobacco formulated fertilizer, output value increases due to higher quality tobacco leaf. 36.36 g formulated fertilizer with 0.454 5 g synergist treatment has the best effect.}