网球花为何开花期有短有长?
网球花一球一般只有一个花箭,一年只能开一次花,如任其自然开花,通常花期只有7~10天。如果将其刚绽放的植株移放到半阴凉爽处,可延长开花时间数天,但也不会超过半个月。网球花可通过人为措施,调控其开花时间。
如若使其在9月底至10月初开花,可将冬季进入休眠状态的盆栽种球放置于干燥处,夏季置于半阴凉爽处,直到8月下旬方给予浇水施肥,使其花葶迅速抽生,可望于国庆节前后开花。对于已开过花的植株,花后要及时剪去残花,加强水肥管理,到了11月份叶片开始枯黄、逐渐进入休眠状态时,应让盆土保持干燥,鳞茎不必掏出,连盆一同搁放于室内,使其休眠,冬季保持不低于5~10%的室温。
若为露地栽培的植株,从叶枯后到入冬前,应将鳞茎挖回贮藏于室内越冬。翌年春天当气温达15℃左右时,再将盆中植株搬放到室外,或将收藏的鳞茎重新下地定植,强化水肥管理,于夏秋时节其种球能再度抽葶开花。
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