Characteristics and Control Measures of Continuous Cropping Obstacle for Protected Vegetable

Protected vegetable cultivation plays an important role in ensuring supply of vegetables and promoting development of rural economy.However，due to lack of scientific management and abuse of chemical inputs，the problem of continuous cropping obstacle in protected land has become more and more serious.It affected healthy development of vegetable industry.Taking protected vegetable cultivation in coastal areas of Sheyang county in Jiangsu province as an example，characteristics and control measures of vegetable continuous cropping obstacle were introduced.