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今天是2010年9月9日 星期四
育苗技术
2009-6-22 13:37:42
      选背风向阳,排水良好和有灌溉水源的地块建苗床。用含有养分、适度水分和无病的土壤制成营养钵。在移栽前30~45d,当5cm地温日平均值稳定在8℃以上时,选择晴天播种,播后用弓架覆盖塑料薄膜。当棉苗出土而真叶平展以前,不要揭开苗床的薄膜,真叶平展到二叶期时,要在弓棚薄膜的四周开通风口,昼开夜闭。调节温度和湿度,苗床保持25℃左右,适当通风。移栽前15d,如苗期有旺长趋势时,可以搬钵蹲苗,即在晴天揭膜,搬动苗钵,按苗龄及长势重新排列,适当加土培植,然后再覆盖薄膜,以控制地上部生长,促发侧根。
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