推荐回答(1个)
罗汉松又称土杉,罗汉松科常绿小乔木。树皮 灰褐色,有鳞片状裂纹。主于直立,小枝平展,密生。叶条状披针形,呈螺旋状互生,表面浓绿色, 背面黄绿色或灰绿色。花期4~5月。种子核果状,广卵形或球形,熟时呈紫红色,有白粉。种子似头 状,种托似袈裟,全形如披袈裟的罗汉,故名。 其变种为小叶罗汉松,又称雀舌松,叶密生而较短,长仅2厘米左右,植株呈灌木状。更适于制作 盆景。
罗汉松为亚热带树种,产长江流域及其以南各 省区。较耐阴,喜生于温暖湿润环境,较寒地区只 可作盆栽。适生于肥沃疏松、排水良好、微酸性的 砂质壤土。对有害气体的抗性较强。
盆景的制作
(1)取材 罗汉松盆景的取材通常以人工繁殖为主,可以 用播种或扦插繁殖。播种于8月下旬采种,除去种托 ,随采随播,或阴干后砂藏,于次年春季3月播种, 条播行距15厘米,覆土厚度为种子直径的3倍。播后盖上稻草,出苗后及时揭草,搭棚遮阴。春播苗勤 加管理,干时浇水,每15~20天施1次稀薄饼肥水, 9月停止、施肥;秋播要注意人冬防寒,当年不施肥 。播种苗一年后移植,培育成大苗再供盆景造型之用。
扦插繁殖分春插与秋插,春插于3月上、中旬进
行,选择生长健壮的一年生枝条,截成长8~12厘米的插穗,去掉中部以下叶片,插深1/2左右,为促进快速生根,可用500*10PP浓度的生长激素茶乙酸 处理下部切口处。插后要搭棚遮阴,并常喷叶面水,保持土壤湿润,约60~80天即可生根。秋插于8~ 9月进行,取半木质化的嫩枝为插穗,方法同春插, 入冬后需盖塑料薄膜及草帘防寒。小苗宜在3月份带 土移植,培育大苗。
山野有野生罗汉松分布,可选生于石缝中植株 矮小、枝干古雅、姿态优美者采掘,先露地栽培1~ 2年,再移植上盆,加工造型。
(2)上盆
①选盆:罗汉松盆景姿态苍古秀雅,常用紫砂 陶盆或釉陶盆。盆形随树形而定,悬崖式用高深千 筒盆,斜干式、卧干式用中深 长方盆或椭圆盆,提根式、附石式用较浅盆钵。
②用土:盆土宜用肥沃湿润、质地疏松、排水 良好、微酸性的砂质壤土。盆底填一层粗砂土,以 利透水。
③栽植:移植上盆在春季发芽前为好,大苗宜 带宿土,并剪除枯根和过长根系,使须根在盆土中 舒展开,将土揪实与根系密接,有利生长与成活。
造型
罗汉松上盆造型以攀扎为主,适当结合修剪。 攀扎宜在休眠期进行,以棕丝扎,做到棕不露外,主干曲,枝条虬屈,姿态自然。小枝叶修剪成层片状或半球状,分层参差有致。罗汉松枝条柔软, 较易攀扎,且耐修剪,特别是小叶罗汉松枝密叶小,可加工成各种形式。现在为了造型方便,也可采用金属丝攀扎,待成型后,应及时拆除金属丝或棕丝,以免陷丝。
罗汉松可塑性大,可加工成多种树形,如曲干式、斜干式、卧 于式、悬崖式及提根式等。枝叶 通过剪扎,可制成云片式或馒头式,姿态苍古秀雅 。
养护管理
(1)浇水
罗汉松耐阴湿,生长期要经常浇水,但不宜渍 水。夏季要常喷叶面水,使叶色鲜绿,生长良好。
(2)施肥
成型的盆景不宜多施肥,春季适当施1~2次稀 薄饼肥水,秋季停止施肥,以免萌发秋芽,对越冬 不利。
(3)修剪
罗汉松可常年进行修剪,主要剪去徒长枝、病枯枝,以保持优美树形。开花时最好及时将花蕾摘 去,以免结果消耗养分,影响生长势。
(4)翻盆
可2~3年翻盆一次,以春季3~4月进行为好。
翻盆时换去1/2旧土,并结合剪去枯根,将须根舒展开,如植株增大可换以较大盆钵。此外,还可结合翻盆,逐步提根,附以山石,塑造提根式或附石 式盆景。
(5)病虫害防治
常见病害有煤污病、叶斑病,可用0.5%~1%波尔多液,在梅雨季节前一个月,每10天喷药l次,连续3次,即可起到防治效果。主要虫害有大蓑蛾、红蜡介壳虫、红蜘蛛等,可用敌敌畏1200~1500倍液喷杀之,也可用40%乐果1500倍液喷杀。
观赏
罗汉松盆景树姿葱翠秀雅,苍古矫健,叶色四 季鲜绿,有苍劲高洁之感。如附以山石,制作成鹰爪抱石的姿态,更为古雅别致。罗汉松与竹、石组景,极为雅致。丛林式罗汉松盆景,配以放牧景物 ,可给人以野趣的享受。如培养得法,经数十年乃 至百年长荣不衰,即成一盆绝佳的罗汉松盆景。
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