推荐回答(4个)
海棠花
乔木,高可达8米;小枝粗壮,圆柱形,幼时具短柔毛,逐渐脱落,老时红褐色或紫褐色,无毛。叶片椭圆形至长椭圆形,长5-8厘米,宽2-3厘米,边缘有紧贴细锯齿,有时部分近于全缘,幼嫩时上下两面具稀疏短柔毛,以后脱落,老叶无毛。花序近伞形,有花4-6朵,花直径4-5厘米;萼筒外面无毛或有白色绒毛;萼片三角卵形,先端急尖,全缘;花瓣卵形,长2-2.5厘米,宽1.5-2厘米,基部有短爪,白色,在芽中呈粉红色。果实近球形,直径2厘米,黄色。果期8-9月。
移种
一般栽植的大苗要带土球,小苗要根据情况留宿土。苗木栽植后要加强抚育管理,施点翠姆特种肥,经常保持土壤疏松肥沃。每年秋、冬季可在根际处换培一批塘泥或肥土。在落叶后至早春萌芽前进行一次修剪,把枯弱枝、病虫枝剪除,以保持树冠疏散,通风透光。为促进植株开花旺盛,要把徒长枝实行短截,以减少发芽的养分消耗,使所留的腋芽均可获较多营养物质,形成较多的开花结果枝。结果枝、中间枝则不必修剪。在生长期间,如能及时进行摘心,早期限制营养生长,则效果更为显著。凡盆栽的桩景更应如此控制。
光照
不同的花卉对光照的要求是不一致的,根据对光照的要求,可以把不同的花卉分为阳性花卉和阴性花卉,如果是在这两者之间的花卉,就称为半阴性花卉了。
大多数的海棠花,都是属于阳性花卉,阳性的花卉喜欢强光的照射,但是不耐庇荫。如果光照不足,就会造成海棠花的枝叶徒长,叶子的颜色变得越来越淡,并且会变黄。而且还会造成不开花或是开的花不美观,很容易受到病虫害的侵扰等方面也有很大的不良影响。 [4]
温度
不同的花卉,在不同的时期,它的最适宜温度是不同的,比如在花卉的种子发芽、生长、发育等时期,都有属于它自己的最适宜的温度、最高温和最低温。超过最高温和最低温,花卉植物的生长就会停止,甚至死亡。
海棠花在其生长、开花、结果等时期也都有一定的温度条件。为了在不同时期,基本满足海棠花对温度条件的不同需求,夏季可以采用遮阳、浇水、叶面喷水等降温措施。冬季的房东保暖是非常重要的环节,在长江以南地区,在地栽的情况下,一般是能够安全过冬的。 [4]
空气
众所周知,花卉植物在生长过程中,离不开呼吸作用和光合作用,而这两个作用都与空气有关。在可见光的照射下,植物将二氧化碳和水转化为有机物,并释放出氧气的生化过程。对于生物界的几乎所有生物来说,这个过程是它们赖以生存的关键。而地球上的碳氧循环,光合作用是必不可少的。生物的生命活动都需要消耗能量,生物体内的有机物在细胞内经过一系列的氧化分解,最终生成二氧化碳或其他产物,并且释放出能量的总过程,叫做呼吸作用。另外,大气中常常有各种掺杂物,特别是城市内和工业区中心的空气,其中带有大量的有毒气体。这些有害的气体对花卉的生长是一种很不利的因素,轻则造成花卉叶黄、梢枯,重则造成植物死亡,所以在养花时,一定要注意周围的空气条件。
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