摘要
为了对空心莲子草Alternanthera philoxeroides进行化感防治,采用苦楝Melia azedarach和水芹菜Oenanthe javanica植株粉末直接处理空心莲子草。结果表明:空心莲子草植株生长和根蘖萌生受到明显抑制,并且随着施用量增加抑制作用逐渐增强,其中240 g水芹菜粉末处理9 d后便可杀死空心莲子草。苦楝和水芹菜粉末可明显降低空心莲子草的叶绿素质量分数和光合性能,240 g苦楝粉末处理12 d后,其叶绿素质量分数、净光合速率、气孔导度和蒸腾速率分别降低了47.1%(P<0.01),71.2%(P<0.01),73.5%(P<0.01)和68.3%(P<0.01),胞间二氧化碳摩尔分数增加了39.6%(P<0.01);120 g水芹菜粉末处理12 d后,其叶绿素质量分数、净光合速率、气孔导度和蒸腾速率分别降低了21.3%(P<0.01),22.2%(P<0.01),54.2%(P<0.01)和46.4%(P<0.01),胞间二氧化碳摩尔分数增加了38.4%(P<0.01)。受苦楝和水芹菜粉末影响,空心莲子草的超氧化物歧化酶和过氧化物酶活性以及丙二醛质量摩尔浓度均随着处理时间延长先升高后降低,而可溶蛋白质量分数则逐渐降低。可见,苦楝和水芹菜对空心莲子草生长具有明显的抑制作用,这2种植物在空心莲子草化感防治中具有潜在的应用价值。
To control A lternanthera philoxeroides via allelopathy,the powder from Melia azedarach and Oenanthe javanica was applied directly to A.philoxeroides.A complete randomized design with M.azedarach treatments of 30 g,60 g,120 g and 240 g and O.javanica treatments of 30 g,60 g,120 g and 240 g with 3 replications were employed.Results showed that after 9 d,240 g of O.javanica powder killed A.philoxeroides.After 12 d with the 240 g treatment of M.azedarach powder there were highly significant reductions （P＜0.01） in the chlorophyll content （47.1％）,net photosynthetic rate （Pn）（71.2％）,stomatal conductance （Cond）（73.5％）,and transpiration rate （Tr）（68.3％） in A.philoxeroides,and a highly significant increase （P＜0.01） for intercellular CO2 concentration （Ci）（39.6％）.Also,after 12 d with the 120 g treatment of O.javanica powder,there were highly significant reductions （P＜0.01） in the chlorophyll content （21.3％）,Pn （22.2％）,Cond （54.2％）,and Tr （46.4％） in A.philoxeroides,and a highly significant increase （P＜0.01） for Ci （38.4％）.When M.azedarach and O.javanica powders were used to treat A.philoxeroides,the superoxide dismutase （SOD） and peroxidase （POD） activity as well as the malonaldehyde （MDA）content first increased and then decreased with prolonged treatment time.However,the soluble protein content gradually decreased.Overall,plant growth and root sucker production of A.philoxeroides were greatly inhibited with M.azedarach and O.javanica powder,and the inhibition gradually increased with an increase of powder indicating that they could be used for the allelopathic control.
出处
《浙江农林大学学报》
CAS
CSCD
北大核心
2014年第3期442-449,共8页
Journal of Zhejiang A&F University
基金
浙江省科技厅重点创新团队项目(2010R50039)
浙江省科技厅创新团队建设与人才培养计划项目(2011F20025)
关键词
植物学
空心莲子草
化感防治
植株生长
光合性能
抗氧化酶
botany
Alternanthera philoxeroides
allelopathic control
plant growth
photosynthetic ability
antioxidant enzyme activity
