一、前言番茄生产,自从有了塑料大棚以后,为番茄早熟、丰产提供了重要条件。一般比露地提早20—30天上市;如果在大棚内能进行塑料薄膜地面复盖时,则定植时间可以提早10天,这样就又能提早上市10天左右,为早春蔬菜市场提供大量的果菜类蔬菜,解决城市工矿区人民在早春吃不到新鲜蔬菜的问题。 I. INTRODUCTION Tomato production has provided important conditions for early maturity and high yield of tomatoes since the plastic greenhouse has been established. Generally 20-30 days earlier than the open market; if the plastic film in the greenhouse can cover the ground, then the planting time can be 10 days earlier, so that it can be listed for about 10 days early for the early spring vegetable market to provide a large number of fruits and vegetables Vegetables, to solve the problem of people in urban mining area can not eat fresh vegetables in early spring.