In order to accurately grasp the soil fertility and pollution of grain fields under the green production mode,150 soil samples from 50 paddy fields in 11 streets and towns in a suburb of Shanghai were tracked and monitored for 3 consecutive years from 2020 to 2022.The contents of main soil nutrients and heavy metals were analyzed.The monitoring results show that in the past three years,the soil fertility of most streets and towns has been maintained at grade I,and two streets and towns have been upgraded from grade Ⅱ and grade Ⅲ to grade I.the soil heavy metal pollution index is less than 1,and there is no heavy metal pollution.By reducing the use of chemical fertilizer,the application of organic fertilizer and biological bacterial fertilizer and other green production models,did not reduce soil fertility,in line with the environmental quality standards of green food producing areas,no pollution,to ensure the sustainable development of green food.
soil fertilitygreen foodmonitoring resultsheavy metal pollutionheavy metal pollution index
国家科技期刊平台
NSTL
万方数据
