怎样养好生石花?
怎样养好生石花?生石花又名石头花、曲玉,为番杏科多年生肉质植物。生石花娇小玲珑,形象奇特。这种多肉植物的奇异之处在于其肉质叶已变态成肥厚状球状叶,两片矮小的球形叶相对而生,并连在一起,呈倒圆锥形,顶部平而略有弧度,叶片中间有一条不明显的缝隙,整个球状叶酷似无生命的岩石,但这“石头”又色彩多样,有淡棕、蓝灰、灰绿、灰褐、黄绿、紫红、棕红等,上面并布满了彩色条纹,精巧美观。
3~4年生的植株,每年夏、秋之际自裂缝中抽出一朵小花,形状似小型菊花,几乎没有叶柄,花色有黄白和粉色。开花时花朵多在下午开放,傍晚闭合,第二天下午又开,每朵花可开4~6天,一般每株只开一朵花,花后结果,种子细小。
生石花原产于非洲南部,野生于干燥的沙漠地带,能忍受沙砾表面50℃高温的蒸烤。性喜温暖干燥和阳光充足的环境。生长适温为20~24℃,怕低温,冬季温度不能低于12℃,夏季气温达到35℃以上时,进入休眠期。
盆栽生石花需有一定的条件,因根系发达,宜采用深筒盆。但栽培也不宜过深,不然植株容易腐烂。疏松的中性土壤较为适宜,因此配制盆土时可采用4份腐叶土、3份石灰质材料(如贝壳粉、蛋壳、陈灰墙屑等)、3份河沙混合而成。生石花幼苗期养护较困难,因喜冬暖夏凉气候,在南京地区栽培既怕冬季低温,又怕夏季高温,因此养护要特别小心。
在夏季生长过程中,需较多的水分,但盆土不能过湿,否则容易长出青苔,影响正常生长。浇水最好采用浸灌,防止水流入叶缝中引起腐烂。冬季应停止浇水,保持干燥。每年3~4月开始长出新球体时,老的球状叶会逐渐萎缩。夏季新球体越长越厚,此时半个月左右就要施一次腐熟的饼肥水,但肥液一定不能玷污球状叶。秋季花后应停止施肥。冬季放置在光线充足的地方。
生石花可用播种和分株法繁殖,但常以播种繁殖为主。4~5月播种,因种子细小,常在温室盆播,室温保持在22~24℃,播后7~10天发芽,幼苗生长缓慢,实生苗需2~3年才能开花。
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