果guo樹shu掛gua吊diao瓶ping是shi指zhi在zai樹shu幹gan上shang吊diao掛gua裝zhuang有you肥fei液ye或huo藥yao液ye的de瓶ping,瓶ping中zhong的de肥fei液ye或huo藥yao液ye直zhi接jie通tong過guo樹shu幹gan中zhong的de導dao管guan輸shu送song到dao枝zhi葉ye上shang,從cong而er達da到dao補bu充chong肥fei液ye或huo防fang治zhi病bing蟲chong害hai的de目mu的de。它的優點是所輸入的肥料或農藥不受根際土壤條件的影響,直接進入樹體,因此,一般用量小,見效快,具有節水、省肥(藥)、省力、速(su)效(xiao)等(deng)優(you)點(dian)。近(jin)幾(ji)年(nian)來(lai),已(yi)在(zai)園(yuan)林(lin)和(he)果(guo)樹(shu)栽(zai)培(pei)中(zhong)普(pu)遍(bian)采(cai)用(yong)。但(dan)據(ju)觀(guan)察(cha),一(yi)些(xie)地(di)方(fang)在(zai)使(shi)用(yong)該(gai)技(ji)術(shu)中(zhong),具(ju)有(you)一(yi)定(ding)的(de)盲(mang)目(mu)性(xing),建(jian)議(yi)使(shi)用(yong)時(shi)應(ying)慎(shen)重(zhong)。
1.易(yi)造(zao)成(cheng)機(ji)械(xie)傷(shang)。經(jing)常(chang)采(cai)用(yong)這(zhe)種(zhong)方(fang)法(fa)給(gei)果(guo)樹(shu)施(shi)肥(fei)治(zhi)蟲(chong),會(hui)對(dui)樹(shu)體(ti)造(zao)成(cheng)機(ji)械(xie)損(sun)傷(shang),使(shi)枝(zhi)幹(gan)傷(shang)痕(hen)累(lei)累(lei),易(yi)遭(zao)致(zhi)一(yi)些(xie)寄(ji)生(sheng)病(bing)菌(jun)的(de)侵(qin)染(ran),有(you)時(shi)還(hai)會(hui)留(liu)下(xia)難(nan)以(yi)彌(mi)合(he)的(de)傷(shang)口(kou),影(ying)響(xiang)生(sheng)長(chang)和(he)觀(guan)賞(shang)性(xing)。掛(gua)吊(diao)瓶(ping)補(bu)肥(fei)施(shi)藥(yao)應(ying)作(zuo)為(wei)一(yi)種(zhong)輔(fu)助(zhu)的(de)方(fang)法(fa),不(bu)能(neng)濫(lan)用(yong)。
2.有(you)的(de)肥(fei)料(liao)或(huo)藥(yao)液(ye)不(bu)宜(yi)采(cai)用(yong)該(gai)方(fang)法(fa)。采(cai)用(yong)掛(gua)吊(diao)瓶(ping)補(bu)肥(fei)應(ying)根(gen)據(ju)具(ju)體(ti)情(qing)況(kuang)而(er)定(ding)。若(ruo)果(guo)樹(shu)發(fa)生(sheng)某(mou)種(zhong)缺(que)素(su)症(zheng)狀(zhuang),隻(zhi)有(you)在(zai)土(tu)施(shi)或(huo)葉(ye)麵(mian)噴(pen)施(shi)效(xiao)果(guo)不(bu)佳(jia)時(shi),方(fang)可(ke)采(cai)用(yong)掛(gua)吊(diao)瓶(ping)補(bu)肥(fei)法(fa),不(bu)是(shi)任(ren)何(he)肥(fei)料(liao)都(dou)適(shi)合(he)采(cai)用(yong)此(ci)法(fa),隻(zhi)有(you)肥(fei)料(liao)中(zhong)的(de)養(yang)分(fen)能(neng)在(zai)導(dao)管(guan)中(zhong)運(yun)輸(shu)的(de)才(cai)適(shi)合(he)。如(ru)缺(que)鐵(tie)、缺鈣等生理性病害,土施或葉麵噴施效果不理想,而采用掛吊瓶補肥,一般表現見效快、肥效長。另外,果樹因根係發生腐爛病時,適於采用掛吊瓶補肥法施肥。
3.易造成局部藥害。由於鑽孔的局限性,進入樹體的養分和藥液難以平衡,局部濃度過高會對樹體產生傷害,如嫩葉、花瓣邊緣焦枯,枝條生長受阻,甚至枝組局部枯死等,因此,正常生長的果樹沒有必要采用掛吊瓶的方法。
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