1.苗床准备苗床设在塑料薄膜大棚内,长方形,面积10～15平方米,内设两个扦插池,中间留35厘米宽的走道,扦插池底部先铺10～15厘米厚的碎石,上填20厘米厚的基质。基质以纯河沙和炉渣按2∶1的比例混合。扦插前基质先用0.2%～0.5%的甲醛溶液消毒,每平方米用量5公斤,经24小时后,用水 1. Seedbed preparation Seedling set in the plastic film greenhouse, rectangular, with an area of ​​10 to 15 square meters, equipped with two cuttings pool, leaving a centimeter width of the walkway, the bottom of the first cuttings shop 10 to 15 cm thick gravel, On a 20 cm thick substrate. The matrix is ​​mixed in pure 2: 1 ratio with pure sand and slag. Before cutting the matrix with 0.2% ~ 0.5% formaldehyde solution disinfection, the amount of 5 kg per square meter, after 24 hours, water