摘要
以甘蓝型油菜品种秦优九号为材料,通过盆栽试验研究了不同pH值模拟酸雨处理对油菜花期生理特性和产量的影响.结果表明:当模拟酸雨pH=4.0～5.0时,在一定程度上刺激了油菜的生长,植株的生物量、叶绿素含量、光合生理特性和产量构成因素等指标均略高于对照(pH 6.0)或与对照相当,但差异不显著.随着模拟酸雨酸度的增强,植株的生物量、叶绿素含量、光合生理特性、抗氧化酶活性和非酶抗氧化剂含量等生理指标逐渐下降,且随酸度增强下降幅度增大,丙二醛含量和相对电导率显著增加,膜脂过氧化加剧,最终导致单株角果数、每角粒数、粒重和实际产量等指标逐渐下降.但不同产量构成因素对酸雨敏感性不同,单株角果数、每角粒数随酸雨酸度的增强而显著下降,而粒重受酸雨影响不显著.
A pot experiment was conducted to study the effects of different acidity simulated acid rain on the physiological characteristics at flowering stage and yield of oilseed rape（B.napus cv.Qinyou 9）.Comparing with the control（pH 6.0）,weak acidity（pH=4.0-5.0） simulated acid rain stimulated the rape growth to some extent,but had less effects on the plant biomass,leaf chlorophyll content,photosynthetic characteristics,and yield.With the further increase of acid rain acidity,the plant biomass,leaf chlorophyll content,photosynthetic rate,antioxidative enzyme activities,and non-enzyme antioxidant contents all decreased gradually,while the leaf malonyldialdehyde（MDA） content and relative conductivity increased significantly.As the results,the pod number per plant,seed number per pod,seed weight,and actual yield decreased.However,different yield components showed different sensitivity to simulated acid rain.With the increasing acidity of simulated acid rain,the pod number per plant and the seed number per pod decreased significantly,while the seed weight was less affected.
出处
《应用生态学报》
CAS
CSCD
北大核心
2010年第8期2057-2062,共6页
Chinese Journal of Applied Ecology
基金
国家科技支撑计划项目(2007BAD89B12)资助
关键词
模拟酸雨
油菜
生理特性
产量
产量构成因素
simulated acid rain
oil rape
physiological characteristics
yield
yield components.
