“山海绿艺”生菜品种是山海关当地经过多年选育的一个农家品种。该品种具有高产、优质、抗病、耐运输等优良特性。软腐病发病低于常规栽培的品种12%。植株生长紧密,散叶型,叶片多皱,倒卵形,叶缘波状,叶色嫩绿。第一茬生长速度快,生育期50天左右,品质甜脆,无纤维,不易抽薹。耐寒性强,可忍耐-2—-3℃的轻微冻害。现将温室一年多茬栽培技术要点介绍如下:一、合理安排好茬口日光温室生产生菜栽培的茬口主要有生菜-生菜-生菜、生菜-生菜-菜豆及茄子-生菜-生菜等模式。三茬生菜的生产时期大致是头茬生 “Shanhai Green Arts ” lettuce varieties is Shanhaiguan after years of breeding a variety of farmers. The varieties with high yield, high quality, disease resistance, transport and other excellent features. The incidence of soft rot is 12% lower than that of conventional cultivars. Plants grow closely, scattered leaf type, leafy and more follicles, obovate, leaf margin wavy, green leaves color. The first crop grows fast, the growth period of about 50 days, the quality of crisp, no fiber, not easy bolting. Cold hardiness, can bear -2 - 3 ℃ slight frost damage. Now more than a year in greenhouse crop cultivation techniques are as follows: First, a reasonable arrangement of stubble sunny greenhouse production lettuce cultivation stubble mainly lettuce - lettuce - lettuce, lettuce - lettuce - beans and eggplant - lettuce - lettuce and other modes. Three stubble lettuce production period is roughly stubble raw