Effects Of Electric Field Exposure On Cole Physiology And Arthropod Population In Cole Field

In order to explore the biological effects of extremely low frequency electromagnetic field on cole(Brassica campestris L)and its arthropod population.Field and laboratory experiments were designed respectively.In the field experiment,the cole continued exposure to four different intensities(0kV/m,2kV/m,10kV/m and 15kV/m)of extremely low frequency electromagnetic field.We observed the morphological characteristics of cole every 10 days after trefoil stage.The parameters includes: plant height,stem diameter,leaf number,chlorophyll and aphids,leaf miner and spider.Meanwhile,we inspected the number of arthropod population in cole field.The yield of dry matter,1000 grain weight and yield per plant were calculated at the mature stage.In the laboratory experiment,the cole leaves were sampled at three stages of seedling stage,flowering stage and fruiting stage.The parameter of the test are: total protein,amino acids,soluble sugar and activity of four enzymes(SOD,POD,CAT and GST).The whole experiment lasted for two years,the results are as follows:1.Effects of different intensity electromagnetic fields on agronomic characters of cole.10kV/m treatment group for two consecutive years were able to make the cole plant height and stem diameter increased;no significant effect of four different intensities of extremely low frequency electromagnetic fields on the chlorophyll and yield of cole for two consecutive years;15kV/m group to cole leaf decline in second years.2.Effects of different intensity electromagnetic fields on nutrients in different periods of cole.Look at the extremely low frequency electromagnetic fields from the whole of the continuous exposure content of cole soluble sugar had no effect;2kV/m and 10kV/m treatment group for two consecutive years the total protein content of cole decreased;10kV/m treatment group in the first year of the cole amino acid content increased;15kV/m treatment group the amino acid content of food oil in second years increased.3.Effects of different intensity electromagnetic fields on four protective enzyme activities in different periods of cole.On the whole,the extremely low frequency electromagnetic field can enhance the activity of four enzymes(SOD,POD,CAT and GST).In 2015,the group exposed to 2kV/m in cole seedling and flowering period,the activity of SOD was increased significantly.In 2015,10kV/m and 15kV/m exposed group enhanced CAT activity at the seedling stage of cole.2k V/m exposure group in cole flowering stage and fruit stage make the activity of POD was significantly increased.In 2015,10kV/m and 15kV/m exposure group increased in cole POD activity of GST,however,15kV/m exposed group in cole GST activity decreased.4.Effects of different intensity electromagnetic fields on arthropod populations in cole field.The results showed that the number of aphid populations in 2kV/m treatment group was less than that in control group in one year,and that of 10 k V/m and 15kV/m treatment group was higher than that of control group.These results indicate that the effects of extremely low frequency electromagnetic fields on cole can enhance the morphological characteristics of cole.In a magnetic field strength,can increase the plant height,stem diameter,amino acid content and enzyme activity;also found that the existence of electromagnetic field effect on the cole field arthropod animal population.The results can provide new ideas for the comprehensive management of the construction of the new farming practices and pests,mechanism can affect the understanding of the magnetic field more precisely on the plant tissue,to provide reference in the selection of electricity transmission project on the biological effects of electromagnetic fields and better use.