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春大棚番茄苗期管理直接影响其早熟性、抗逆性、产量及经济效益。苗期管理的技术关键是创造良好的环境条件,防止幼苗徒长和老化,保证幼苗健壮生长及花芽正常分化和发育。 1、温度出苗前昼温30℃,夜温24℃有利于出苗。出苗后为防止幼苗徒长可适当降温,昼温25～27℃,夜温逐渐降到17—18℃;2—3片真叶后,昼温24℃,夜温17℃,幼苗生长健壮,花芽分化早。育苗后期要低温炼苗,白天20—25℃,夜间前半夜14—16℃,后半夜12—13℃。花芽分化期如遇10℃以下温度,连续10天以上极
Spring greenhouse tomato seedling management directly affect its precocity, stress resistance, yield and economic benefits. Seedling management is the key technology to create a good environmental conditions, to prevent the growth and aging seedlings to ensure the robust growth of seedlings and flower buds normal differentiation and development. 1, temperature Pre-emergence day temperature 30 ℃, night temperature 24 ℃ is conducive to emergence. After emergence to prevent the growth of young seedlings may be appropriate to cool, day temperature 25 ~ 27 ℃, night temperature gradually dropped to 17-18 ℃; 2-3 true leaves, day temperature 24 ℃, night temperature 17 ℃, robust seedling growth, flower buds Early differentiation. Seedling nursery to low temperature hardening, daytime 20-25 ℃, night before midnight 14-16 ℃, after midnight 12-13 ℃. Flower bud differentiation in case of temperature below 10 ℃, 10 consecutive days more than the pole