论文部分内容阅读
采用盆栽模拟实验 ,研究了不同浓度的香草醛和对羟基苯甲酸对杉木幼苗生理特性的影响 .结果表明 ,当浓度为 10mmol·L-1和 1mmol·L-1时显著抑制了杉木幼苗的叶绿素含量、光合作用、根系活力等生理指标 ,并且随着浓度的增加 ,对生理活性的抑制作用增大 .其中 ,用香草醛处理的杉木幼苗的净光合速率分别降低 37.0 %、2 5 .1% ;蒸腾速率分别降低 37.0 %、2 0 .3% ;气孔导度分别降低 4 6 .8%、33.7% ;根系活力分别降低 78.8%、5 1.6 % .连栽杉木林土壤中积累的香草醛、对羟基苯甲酸等酚类化合物能够对杉木幼苗产生化感作用 ,这是导致连栽杉木生产力降低的一个不可忽视的因素 .
A pot experiment was conducted to study the effects of different concentrations of vanillin and p-hydroxybenzoic acid on the physiological characteristics of Chinese fir seedlings. The results showed that the chlorophyll content of Chinese fir seedling was significantly inhibited when the concentration was 10mmol·L-1 and 1mmol·L-1 Photosynthesis, root activity and other physiological indicators, and with the increase of concentration, the inhibitory effect on physiological activity increased.Which, vanillin-treated Chinese fir seedlings net photosynthetic rate decreased by 37.0%, 25.1% ; The transpiration rate decreased by 37.0% and 20.3% respectively; the stomatal conductance decreased by 46.6% and 33.7%, respectively; the root activity decreased by 78.8% and 5 1.6% Phenolic compounds such as p-hydroxybenzoic acid can have an allelopathic effect on Chinese fir seedlings, which is a factor that can not be neglected to reduce the productivity of Chinese fir plantation.