河北省是蔬菜产业大省。蔬菜播种面积1800多万亩,其中设施蔬菜面积已达790多万亩,设施蔬菜的产量约占总产量的三分之二。但是,随着设施蔬菜复种指数的提高和连茬种植,设施蔬菜连作障碍问题越来越严重,已经明显影响了蔬菜产量和品质的提高,有的地方因连作障碍问题有的棚室已不能使 Hebei Province is a big vegetable industry. Vegetable sown area of ​​more than 1800 mu, of which vegetable area has reached more than 790 mu of facilities, vegetable production accounted for about two-thirds of the total output. However, with the improvement of multiple cropping index of vegetable facilities and continuous cropping, the obstacle of continuous cropping of vegetable facilities has become more and more serious, which has obviously affected the increase of vegetable yield and quality. In some places, some shedding rooms due to continuous cropping obstacle can not make