一、duanjie。jibazhitiaodeyibufenjianqu。qizhuyaomudeshicijiceyamengfa,choushengxinshao,zengjiazhitiaoshuliang,duofayeduokaihua。genjuduanjiedechengdukefenweiyixiajizhong:
⑴輕短截:輕剪枝條的頂梢(剪去枝條全長的1/5至1/4 ),主zhu要yao用yong於yu花hua果guo類lei樹shu木mu強qiang壯zhuang枝zhi修xiu剪jian。此ci種zhong修xiu剪jian方fang法fa在zai枝zhi條tiao去qu掉diao頂ding梢shao後hou,刺ci激ji其qi下xia部bu多duo數shu半ban飽bao滿man芽ya的de萌meng發fa,分fen散san枝zhi條tiao養yang分fen,使shi來lai年nian園yuan林lin觀guan賞shang花hua果guo樹shu類lei的de枝zhi條tiao能neng產chan生sheng更geng多duo中zhong短duan枝zhi,易yi形xing成cheng花hua芽ya。⑵中短截:剪到枝條中部或中上部飽滿芽處(剪枝條長度1/3至1/2 ),主要用於某些弱枝複壯以及各種樹木培養骨幹枝和延長枝。⑶重短截:剪去枝條全長的2/3至3/4。此種修剪方法刺激作用大,主要用於弱樹、老樹、老弱枝的更新複壯。⑷極重短截:在枝條基部留1-2個芽,其餘全部剪去。園林中紫薇常采用此方法。⑸回縮:是shi將jiang多duo年nian生sheng的de枝zhi條tiao剪jian去qu一yi部bu分fen。因yin樹shu木mu多duo年nian生sheng長chang,離li枝zhi頂ding遠yuan,基ji部bu易yi光guang腿tui,為wei了le降jiang低di頂ding端duan優you勢shi位wei置zhi,促cu多duo年nian生sheng枝zhi條tiao基ji部bu更geng新xin複fu壯zhuang,常chang采cai用yong回hui縮suo修xiu剪jian方fang法fa。
二、shujianhuoshushan。jiangzhitiaozifenshengchujianqu,shujiankeyitiaojiezhitiaojunyunfenbu,jiadakongjian,gaishantongfengtouguangtiaojian,youliyushuguanneibuzhitiaoshengchangfayuhehuayafenhua。shujiandeduixiangzhuyaoshibingchongzhi、幹枯枝、過密的交叉枝等。
三、除(chu)蘖(nie)。除(chu)去(qu)樹(shu)木(mu)主(zhu)幹(gan)基(ji)部(bu)及(ji)傷(shang)口(kou)附(fu)近(jin)當(dang)年(nian)長(chang)出(chu)的(de)嫩(nen)枝(zhi)或(huo)根(gen)部(bu)長(chang)出(chu)的(de)根(gen)蘖(nie)。避(bi)免(mian)這(zhe)些(xie)枝(zhi)條(tiao)和(he)根(gen)蘖(nie)有(you)礙(ai)樹(shu)形(xing),分(fen)散(san)樹(shu)體(ti)養(yang)分(fen)。在(zai)樹(shu)木(mu)修(xiu)剪(jian)中(zhong)要(yao)注(zhu)意(yi)以(yi)下(xia)幾(ji)個(ge)問(wen)題(ti):
1、修剪枝條的剪口要平滑,與剪口芽成45度(du)角(jiao)的(de)斜(xie)麵(mian),從(cong)剪(jian)口(kou)的(de)對(dui)側(ce)下(xia)剪(jian),斜(xie)麵(mian)上(shang)方(fang)與(yu)剪(jian)口(kou)芽(ya)尖(jian)相(xiang)平(ping),斜(xie)麵(mian)最(zui)低(di)部(bu)分(fen)和(he)芽(ya)基(ji)相(xiang)平(ping),這(zhe)樣(yang)剪(jian)口(kou)傷(shang)麵(mian)小(xiao),容(rong)易(yi)愈(yu)合(he),芽(ya)萌(meng)發(fa)後(hou)生(sheng)長(chang)快(kuai)。疏(shu)枝(zhi)的(de)剪(jian)口(kou),於(yu)分(fen)枝(zhi)點(dian)處(chu)剪(jian)去(qu),與(yu)幹(gan)平(ping),不(bu)留(liu)殘(can)樁(zhuang)。叢(cong)生(sheng)灌(guan)木(mu)疏(shu)枝(zhi)與(yu)地(di)麵(mian)相(xiang)平(ping)。剪(jian)口(kou)芽(ya)的(de)方(fang)向(xiang)、質zhi量liang,決jue定ding新xin梢shao生sheng長chang方fang向xiang和he枝zhi條tiao的de生sheng長chang方fang向xiang。選xuan擇ze剪jian口kou芽ya的de方fang向xiang應ying從cong樹shu冠guan內nei枝zhi條tiao的de分fen布bu狀zhuang況kuang和he期qi望wang新xin枝zhi長chang勢shi的de強qiang弱ruo考kao慮lv,需xu向xiang外wai擴kuo張zhang樹shu冠guan時shi,剪jian口kou芽ya應ying留liu在zai枝zhi條tiao外wai側ce,如ru欲yu填tian補bu內nei膛tang空kong虛xu,剪jian口kou芽ya方fang向xiang應ying朝chao內nei,對dui生sheng長chang過guo旺wang的de枝zhi條tiao,為wei抑yi製zhi枝zhi條tiao它ta生sheng長chang,以yi弱ruo芽ya當dang剪jian口kou芽ya,扶fu弱ruo枝zhi時shi選xuan飽bao滿man的de壯zhuang芽ya。
2、在對較大的樹枝和樹幹修剪時,可采用分步作業法。先在離要求鋸口上方20厘(li)米(mi)處(chu),從(cong)枝(zhi)條(tiao)下(xia)方(fang)向(xiang)上(shang)鋸(ju)一(yi)切(qie)口(kou),深(shen)度(du)為(wei)枝(zhi)幹(gan)粗(cu)度(du)的(de)一(yi)半(ban),從(cong)上(shang)方(fang)將(jiang)枝(zhi)幹(gan)鋸(ju)斷(duan),留(liu)下(xia)一(yi)條(tiao)殘(can)樁(zhuang),然(ran)後(hou)從(cong)鋸(ju)口(kou)處(chu)鋸(ju)除(chu)殘(can)樁(zhuang),可(ke)避(bi)免(mian)枝(zhi)幹(gan)壁(bi)裂(lie)。
3、在鋸除較大的枝幹,造成傷口麵較大,常因雨淋或病菌侵入而腐爛。因此在鋸除樹木枝幹時,鋸口一定要平整,並用20%的硫酸銅溶液來消毒,最後塗上保護劑(保護蠟、調和漆等),起防腐防幹和促進愈合的作用。
4、落(luo)葉(ye)樹(shu)和(he)常(chang)綠(lv)樹(shu)的(de)修(xiu)剪(jian)時(shi)期(qi)應(ying)有(you)區(qu)別(bie)。冬(dong)季(ji)落(luo)葉(ye)樹(shu)停(ting)止(zhi)生(sheng)長(chang),這(zhe)時(shi)修(xiu)剪(jian)養(yang)分(fen)損(sun)失(shi)少(shao),傷(shang)口(kou)愈(yu)合(he)快(kuai)。而(er)常(chang)綠(lv)樹(shu)雖(sui)冬(dong)季(ji)為(wei)其(qi)休(xiu)眠(mian)期(qi),但(dan)剪(jian)去(qu)枝(zhi)葉(ye)有(you)凍(dong)害(hai)的(de)危(wei)險(xian)。由(you)於(yu)常(chang)綠(lv)樹(shu)木(mu)的(de)根(gen)與(yu)枝(zhi)葉(ye)終(zhong)年(nian)活(huo)動(dong),新(xin)陳(chen)代(dai)謝(xie)不(bu)止(zhi),故(gu)葉(ye)內(nei)養(yang)分(fen)不(bu)完(wan)全(quan)用(yong)於(yu)貯(zhu)藏(zang),剪(jian)去(qu)枝(zhi)葉(ye)時(shi),其(qi)中(zhong)養(yang)分(fen)損(sun)失(shi),影(ying)響(xiang)樹(shu)木(mu)生(sheng)長(chang)。常(chang)綠(lv)樹(shu)修(xiu)剪(jian)時(shi)期(qi)一(yi)般(ban)在(zai)冬(dong)季(ji)已(yi)過(guo)的(de)晚(wan)春(chun)。
5、zaixiujianzhonggongjuyingbaochifengli。shangshujixiehezheti,shiyongqianyingjianzhagegebujianshifoulinghuo,youwusongdong,fangzhishigudefasheng。shangshucaozuoxihaoanquansheng。zaigaoyaxianfujinzuoyeshi,yaotebiezhuyianquan,bimianchudian,biyaoshiqinggongdianbumenpeihe。xingdaoshuxiujianshi,youzhuanrenweihuxianchang,yifangjuluodazhizashangguowangxingrenhecheliang。
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