米兰花掉叶子怎么办
米兰花掉叶子怎么办,米兰花是在当年新梢上开花的。这样会使得开花部位逐年上移,以致基部叶片接受光照少而脱落,形成头重脚轻的树形,非常难看。要防止米兰植株下部掉叶子,除了在生长过程中使植株下部叶片多见阳光外,还要注意以下两点。
1、摘心打顶
这是为了控制徒长,促发分枝,使树冠整齐匀称,防止叶片部位上移。1年生植株,只需注意摘除过旺的顶尖。2~3年生植株,若主枝间长势不平衡,可在春季晴天的上午,将强的主枝疏掉一部分侧枝,留下的侧枝用绳索拉枝下垂控制其生长;弱的主枝,要摘心或短截,使促发新枝。过旺枝条的短截要狠,最好短于相邻的侧枝。
2、疏间花序
在花序刚形成时,摘去1/2~2/3,这样就可以调节枝叶生长和花蕾形成对养分的争夺。花蕾的形成与生长,比枝叶的形成与生长对养分的需求量大得多。植株本身又有优先满足生殖器官所需养分的特性。摘除部分花序,也就相应减少了生殖器官对养分的需求,从而有充分的养分供应叶片的生长,也防止了植株下部叶片的脱落,以上就是关于米兰花掉叶子怎么办的介绍。
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