合理利用温室时间差、空间差，优化蔬菜品种配置，进行立体化多茬次种植，不仅能有效提高产量、增加收入，同时品种的增多也降低了市场风险。现将大行距栽培技术介绍如下：一、主行蔬菜冬春一大茬栽培法（适用于有加温设备的温室）１．行距设置　行距设置依温室拱架宽度为准， Rational use of greenhouse time difference, space is poor, optimize the allocation of vegetable varieties, planting more stubble three-dimensional, not only can effectively increase production and increase revenue, while increasing varieties also reduces market risk. Now the cultivation technology from the big line is described as follows: First, the main line of winter and spring vegetables a large crop cultivation method (for a greenhouse with heating equipment) 1. Set the line spacing set according to the width of the greenhouse arch shall prevail,