摘要
铝毒害是全球面临的重大林业和环境问题。采用正交回归旋转试验设计,通过苗木水培试验,应用数学建模分析活性Al、DL-异柠檬酸-γ-内酯、营养液浓度以及pH值对杉木幼苗硝酸还原酶(NR)活性的影响。研究结果表明,不同Al胁迫时期各试验因子对杉木幼苗NR活性的影响各不相同;随着胁迫时间的延长,DL-异柠檬酸-γ-内酯及pH值对杉木幼苗NR活性影响的线性作用逐渐减弱,各因素间的交互作用逐渐减少,系数也呈下降的趋势;当活性Al、DL-异柠檬酸-γ-内酯以及营养液浓度一定时,随着胁迫时间的延长,杉木幼苗NR活性随着pH值增大而略微增大;当pH值、DL-异柠檬酸-γ-内酯以及营养液浓度一定时,随着胁迫时间的延长,NR活性随着活性Al浓度的增大而显著下降;当pH值、活性Al以及营养液浓度一定时,随着胁迫时间的延长,NR活性随着DL-异柠檬酸-γ-内酯浓度的增大而显著上升;当pH值、活性Al以及DL-异柠檬酸-γ-内酯浓度一定时,随着胁迫时间的延长,NR活性随营养液浓度的增大而略微增大。
Aluminum toxicity is one of the most important problems on the forest and environment in the world. The design of the regressive rotation and water cultivate experiment were used to analyze the effect of various of pH value, the different concentration of active Al, nutrition and DL-hydroxy-1,2,3-proanetracarboxylic on the NR activity of one-year Chinese fir seeding. The results showed that the different factors had different effects on the NR activity during different period of active Al stress; The concentration of DL-hydroxy-1,2,3-proanetracarboxylic and the pH value had weak linearity, the interaction and coefficient of the each factor had degraded with prolong the period of Al stress;As the concentration of Al, DL-hydroxy-1,2,3-proanetracarboxylic and nutrition in the solution were to a certainty, the activity of NR increased with the high of pH value along with the active Al stress; As the concentration of active Al, nutrition and pH value in the solution were to a certainty, the activity of NR was increased obviously with the strength of concentration of DL-hydroxy-1,2,3-proanetracarboxylic;As the concentration of active Al, DL-hydroxy-1,2,3-proanetracarboxylic and pH value in the solution were to a certainty, the activity of NR increased with the concentration of nutrition during the different period of active Al stress.
出处
《中国农学通报》
CSCD
2008年第10期192-196,共5页
Chinese Agricultural Science Bulletin
基金
国家自然科学基金(30271077)
福建省科技厅重大专项(2006NZ0001B)
福建省自然科学基金(D0610001)资助项目
福建省森林培育重点学科资助
