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1 选用优良品种适期播种选用早熟、优质、高产品种,如八斤棒等。包旦莴苣播种期一定要掌握好,一般在11月中旬左右(下第一场雪之前播种),早播容易造成冻害。播量600～800g/667m~2 按照行距40cm开沟条播,沟深3～5cm。把种子均匀撒入沟里,覆土后镇压。2 合理密植包旦莴苣一般在第二年3月上旬(积雪融化后)及时盖膜,主要采用宽膜覆盖,以增加采光面,提高地温,促进包旦莴苣的生长。待长出2片真叶时,进行揭膜。采用先间苗后定苗
1 selection of fine varieties suitable for sowing Early selection, quality, high yield varieties, such as eight pounds rods. Baoding lettuce sowing period must be mastered, usually around mid-November (under the first snow before planting), early seeding easily cause frost damage. Sowing 600 ~ 800g / 667m ~ 2 According to the row spacing 40cm trenching, ditch deep 3 ~ 5cm. Sprinkle the seeds evenly into the ditch and repress the soil. 2 Reasonable densely packed Baidan Lettuce generally in early March the following year (after the snow melted) cover the membrane in time, the main cover with wide film to increase the lighting surface, increase ground temperature and promote the growth of Bao Dan lettuce. To be out of two true leaves, the uncovering. After the first seedling vaccine