莴笋于3月初定植,选土层深厚,肥沃、疏松,排灌良好的地块种植,畦内亩施腐熟圈肥4000公斤左右,磷二铵30公斤左右,翻地深25厘米,耙细整平畦面,平铺普通地膜,以30～33厘米见方栽苗后,支拱架扣薄膜。 浇透定植水,7～10天浇缓苗水,白天小拱棚内棚温保持25℃左右,夜间6～10℃,缓苗后开始通风,白天保持20～24℃,夜 Lettuce planting in early March, the election of deep soil, fertile, loose, good irrigation and drainage plots planted within the Mushi fermented around 4000 kg fertilizer, about 30 kg of phosphorus diammonium, turning ground 25 cm deep, rake fine flat 畦Surface, ordinary tile shop to square planted 30 to 33 cm square, the branch arch deduction film. Drenched planting water, 7 to 10 days of irrigation Huanmiao water during the day small shed shed shed temperature to maintain about 25 ℃, night 6 ~ 10 ℃, began to ventilate Huanmiao during the day to maintain 20 ~ 24 ℃, night