盆花施肥应注意什么?
盆栽花卉因盆内栽培介质容量有限,需随时补充多种营养。对已返青出新叶的苗株,即应开始追肥,施肥量视盆的大小,每盆每次施进口复合肥40~60粒;对已生长健壮的苗株,每盆每次施100~120粒,每月施2次,另配合喷淋配方液肥5~8次;如遇大雨后,还应补施追肥一次。肥料应施放在盆的周边,尽量远离茎基部,尤其不能让肥粒落人有轮生叶、鳞茎叶花卉的叶丛中心。
一般掌握的施肥原则是:
②无机化肥不能撤施或接触茎基部。
③有机肥要经堆沤腐熟后使用。
④夏日高温高湿天气、植株生长旺盛时宜多施。
⑤冬季低温低光照、植株生长缓慢时宜少施。
⑥大雨过后或植株叶色黄绿、暗淡时要及时补施。
球茎、肉质茎花卉因球茎和肉质茎可贮存养分,且根系较少,其追肥量可少于正常的施肥量;须根类花卉要求栽种在疏松的介质中,追肥要求少量多次,追肥量为正常量的1/4~1/5;大叶类型阴生观叶花卉生长迅速、根系发达,需肥量多;盆景追肥的特点是数量要少,肥效要长,一般用缓效有机肥如骨粉、饼肥为主体。
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