供(gong)需(xu)失(shi)衡(heng)新(xin)植(zhi)苗(miao)木(mu)因(yin)葉(ye)片(pian)幾(ji)乎(hu)完(wan)好(hao)修(xiu)剪(jian),所(suo)以(yi)體(ti)內(nei)水(shui)分(fen)主(zhu)要(yao)經(jing)過(guo)植(zhi)株(zhu)枝(zhi)杆(gan)表(biao)麵(mian)分(fen)發(fa)。大(da)香(xiang)樟(zhang)樹(shu)枝(zhi)條(tiao)高(gao)度(du)木(mu)質(zhi)化(hua),在(zai)高(gao)溫(wen)幹(gan)旱(han)時(shi)節(jie),能(neng)有(you)效(xiao)防(fang)止(zhi)日(ri)灼(zhuo),堅(jian)持(chi)水(shui)分(fen)。小(xiao)香(xiang)樟(zhang)樹(shu)枝(zhi)嫩(nen)皮(pi)薄(bo),為(wei)避(bi)免(mian)日(ri)灼(zhuo),降(jiang)低(di)表(biao)麵(mian)溫(wen)度(du),植(zhi)株(zhu)要(yao)不(bu)時(shi)地(di)中(zhong)止(zhi)水(shui)分(fen)蒸(zheng)發(fa),以(yi)保(bao)證(zheng)正(zheng)常(chang)的(de)代(dai)謝(xie)活(huo)動(dong)。
新植的香樟樹,泥球大小幾乎都是胸徑的8至10倍bei。即ji所suo植zhi苗miao木mu隻zhi需xu離li樹shu幹gan很hen小xiao範fan圍wei內nei的de根gen係xi被bei保bao管guan在zai泥ni球qiu中zhong,而er更geng多duo的de根gen須xu則ze被bei切qie斷duan,有you效xiao的de吸xi收shou根gen很hen少shao。但dan種zhong植zhi後hou相xiang當dang一yi段duan時shi間jian內nei,苗miao木mu隻zhi能neng依yi托tuo泥ni球qiu中zhong的de根gen係xi吸xi收shou水shui分fen,維wei持chi代dai謝xie活huo動dong。由you於yu新xin植zhi香xiang樟zhang樹shu根gen係xi嚴yan重zhong受shou損sun,吸xi水shui量liang隻zhi能neng勉mian強qiang維wei持chi樹shu體ti正zheng常chang代dai謝xie活huo動dong的de需xu求qiu。小xiao香xiang樟zhang樹shu在zai劇ju烈lie日ri光guang映ying照zhao下xia,因yin無wu良liang好hao的de維wei護hu組zu織zhi,快kuai速su蒸zheng發fa,過guo度du失shi水shui,致zhi使shi失shi去qu植zhi物wu生sheng長chang所suo必bi需xu的de水shui分fen平ping衡heng。
補償措施不易奏效高溫幹旱時節,新植香樟樹葉片極易發黑枯萎,及時鬆土、挖輻射狀溝,或澆灌活力素、生sheng根gen劑ji等deng可ke挽wan救jiu苗miao木mu。但dan經jing過guo反fan複fu理li論lun,當dang呈cheng現xian枯ku萎wei現xian象xiang時shi,對dui大da香xiang樟zhang樹shu及ji時shi采cai取qu上shang述shu措cuo施shi,可ke使shi其qi恢hui複fu過guo來lai。而er小xiao香xiang樟zhang樹shu則ze不bu同tong,呈cheng現xian枯ku葉ye現xian象xiang後hou,不bu管guan采cai取qu何he種zhong措cuo施shi,其qi葉ye片pian、細小枝條以及整株苗木會在5至7天的時間內發黑、發幹,最終死亡。
針對上述問題,可采取以下措施:第一,避免在高溫幹旱時節種植苗木,特別是像小香樟樹等性質的苗木。第二,加強遮陰、降溫措施,如對主幹及其粗枝用草繩包紮、用yong塑su料liao膜mo封feng裹guo並bing噴pen水shui等deng。第di三san,對dui苗miao木mu地di上shang部bu分fen中zhong止zhi重zhong剪jian,以yi減jian少shao蒸zheng發fa麵mian積ji,降jiang低di水shui分fen流liu失shi。第di四si,起qi挖wa時shi,保bao證zheng泥ni球qiu圓yuan整zheng,並bing盡jin量liang多duo截jie取qu有you效xiao根gen係xi。第di五wu,加jia強qiang植zhi後hou養yang護hu管guan理li措cuo施shi,適shi時shi鬆song土tu澆jiao水shui,促cu進jin水shui分fen吸xi收shou。第di六liu,必bi要yao時shi施shi用yong生sheng物wu製zhi劑ji,如ru活huo力li素su、生根劑等,促進根係疾速生長。
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