通过密闭玻璃箱内测定了2变型4栽培品种变叶木类植物在常态下、固定脉冲电场和正交设计脉冲电场刺激下负离子释放浓度,分析与探讨植物在不同情况下负离子释放浓度及影响负离子释放的电场因素,旨在筛选在电刺激下能高效释放负离子的植物种质资源与高效释放负离子的最佳电场参数组合.结果表明:(1)常态下植物能释放负离子,戟叶变叶木释放负离子最高浓度为381 ion/cm3,引起生态效应有限.不同植物对负离子的产生影响极显著(P=0.000<0.01),可能与物种本身特性有关.(2)固定脉冲电场刺激下,研究的变叶木类植物在负离子释放量较常态下显著提高,倍增系数在283~3161,脉冲电场刺激下研究植物释放负离子的能力与植物在常态下释放负离子浓度显著相关.推测植物负离子释放量激增的原因是源于脉冲电场对植物生理活动造成的影响.(3)每个研究植物接受最佳脉冲电场参数组合刺激可产生最大量的负离子,最佳脉冲电场刺激下6个研究植物有5个产生的负离子比在固定的脉冲电场刺激下大1~2个数量级.设定最佳脉冲电场刺激柳叶变叶木,能持续10 d高效产生负离子而不产生"疲惫现象".%The negative air ion ( NAI) concentrations released by 2 varieties and 4 cultivars of Codiaeum variegatum in the sealed glass box under natural,pulsed electric stimulation conditions and orthogonal pulsed electric field were detected and compared,the negative ion release concentration and the influence of the elec-tric field on the release of negative ions were analyzed,the aim was to screen the plant germplasm resourceswith high efficiency of releasing negative ions under electric stimulation,and the optimal combination of electric field parameters for the efficient release of negative ions.The results showed as follows:(1) Plants could re-lease negative ions under normal conditions,the highest concentration of negative ions released from the Codi-aeum variegatum 'Excellent' was 381 ion/cm,which limited their ecological function. The effects of different plants on the production of negative ions were very significant (p=0.000<0.01),it might be related to the characteristics of species.(2) The NAIs released by six study plants showed a remarkable increases upon fixed pulsed electric field stimulation,compared to those under the natural condition,the multiplication coefficients were between 283 and 3161 for six study plants, the amounts of NAIs generated by the study plants upon pulsed electric field stimulation were correlated significantly with those under natural condition.It is speculated that the cause of the negative ion release is the effect of pulsed electric field on plant physiological activities. (3) Each plants generated the highest NAI concentration after optimization,the amounts of NAIs generated by five out of six study plants were 1 or 2 order ( s ) of magnitude higher than those upon fixed pulsed electric stimulation.Codiaeum variegatum 'Graciosum' could generate high level of NAI concentration continously for 10 days without "fatigue effect" upon optimal parameters of pulsed electric stimulation.
展开▼
