<H3 0cm? 13pt><FONT size=5>垂枝榕 <br><br></FONT></H3>
< none? mso-layout-grid-align: 150%; LINE-HEIGHT: char; LAYOUT-GRID-MODE: 0pt; 0cm> 又称垂叶榕、小叶榕、细叶榕,为桑科榕属木本观叶植物。垂枝榕在原产地为乔木,盆栽高度一般为<FONT face="Times New Roman">0.5-0.3</FONT>米。其茎幼时为淡绿色,成熟时为灰白色或棕褐色;枝条细而下垂,茎枝上度有气生须根;叶革质,光亮,卵圆形,长<FONT face="Times New Roman">5</FONT>-<FONT face="Times New Roman">10</FONT>厘米、宽<FONT face="Times New Roman">3</FONT>-<FONT face="Times New Roman">5</FONT>厘米。其园艺品种很多,如斑叶小叶榕、斑叶垂榕、银边垂榕、金叶垂榕等。这些品种在绿叶上有的有金黄白色斑块,有的有银色镶边,有的有金黄色斑块等,色彩极其丰富。其生态习性是喜温湿润及光亮环境。<FONT face="Times New Roman"> </FONT></P>
< none? mso-layout-grid-align: 150%; LINE-HEIGHT: char; LAYOUT-GRID-MODE: 0pt; 0cm> 垂枝榕通常用扦插和高压繁殖。扦插一般于春末夏初及秋季气温较高时进行。扦插时选择<FONT face="Times New Roman">1</FONT>-<FONT face="Times New Roman">2</FONT>年生木质化枝条,剪取<FONT face="Times New Roman">5</FONT>-<FONT face="Times New Roman">15</FONT>厘米作为插条,上部保留<FONT face="Times New Roman">3</FONT>-<FONT face="Times New Roman">4</FONT>片叶片,并剪去叶片的一半;为防止树液流出,可将切口浸于水中或沾上木炭粉;将插条<FONT face="Times New Roman">1/3-1/2</FONT>插入已备好的河沙或珍珠岩培成的插床中,保持插床湿润,并注意喷雾。在<FONT face="Times New Roman">25</FONT>-<FONT face="Times New Roman">30</FONT>℃温度及半阴条件下,一个月左右可以生根盆栽。对于斑叶品种,其扦插生根较难,可用低浓度的生长素处理插条下部,以促进其生根。高压繁殖也是一种常用的方法。一般选择两年生枝条,先在枝条上做环状剥皮(宽<FONT face="Times New Roman">1</FONT>-<FONT face="Times New Roman">1.5</FONT>厘米);稍晾干后再用潮湿苔藓、泥炭土等包在伤口,并用塑料薄膜包扎上下两端;约经<FONT face="Times New Roman">1</FONT>-<FONT face="Times New Roman">2</FONT>个月,生根完好后剪下枝条上盆种植。与扦插繁殖相比,高压繁殖苗成型快,但繁殖系数较低。<FONT face="Times New Roman"> </FONT></P>
< none? mso-layout-grid-align: 150%; LINE-HEIGHT: char; LAYOUT-GRID-MODE: 0pt; 0cm 10.5pt; mso-char-indent-size: 2.0; mso-char-indent-count: 21pt; TEXT-INDENT:>盆栽垂枝榕用土以普通园土为主,掺和<FONT face="Times New Roman">1/5</FONT>的腐叶土及少量河沙,同时配以少量农家肥作基肥。垂枝榕生长速度较快,一般生长季每月施<FONT face="Times New Roman">1</FONT>-<FONT face="Times New Roman">2</FONT>次液肥,以促进枝叶繁茂。但斑叶品种施肥时应减少肥料中的氮素含量,以免氮肥过多使斑纹变浅或消失,影响观赏效果。秋末及冬季可少施肥或不施肥。生长期中必须以常浇水,夏季需水量更多,更须经常向叶面喷水;春秋季保持盆土湿润;冬季待盆土干燥时再浇水,盆土过湿容易烂根。垂枝榕喜光,平时应尽量使其接受充分的阳光,以保证正常生长及叶面浓绿,尤其斑叶品种,若光线太弱容易使斑纹不清晰,甚至造成落叶。垂枝榕因品种不同,其耐寒能力也不一样:一般青叶品种耐寒力强,越冬温度为<FONT face="Times New Roman">3</FONT>-<FONT face="Times New Roman">5</FONT>℃;斑叶品种耐寒力差,越冬温度要稍高,要求<FONT face="Times New Roman">7</FONT>-<FONT face="Times New Roman">8</FONT>℃左右,温度太低容易引起落叶。<FONT face="Times New Roman"> </FONT></P>
<H3 0cm? 13pt></H3><img src="attachments/dvbbs/2005-11/200511291415676499.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-11/200511291415676499.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /><br><img src="attachments/dvbbs/2005-11/200511291462964556.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-11/200511291462964556.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /><br>
[此贴子已经被作者于2005-11-29 14:06:35编辑过]
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