diaoshuibufeijiushizaiyidingyalidezuoyongxia，rangyingyangtongguoshuganshangdezuankongzidongshurushutineibudeguocheng。tashizaiqianglizhushezhiliaoguoshuquesuzhengdejichushangfazhanerlaideyixiangshifeixinjishu，youjieyueyongfei、duizhengbufeideyoudian。danyingyongbudang

，changzaochengfeixiaobulixiang，shenzhichanshengfeihaieryingxiangguoshuzhengchangshengchanghejieguo。bizhexianbaguoshudiaoshuibufeideyouguanjishuzongjieruxia：

一、礦kuang質zhi營ying養yang的de吸xi收shou和he運yun輸shu機ji理li。果guo樹shu對dui礦kuang質zhi營ying養yang吸xi收shou的de器qi官guan是shi根gen和he葉ye，主zhu要yao是shi根gen。各ge種zhong營ying養yang在zai根gen部bu經jing複fu雜za的de生sheng理li過guo程cheng進jin入ru根gen內nei，其qi中zhong一yi部bu分fen營ying養yang須xu在zai根gen內nei同tong化hua成cheng有you機ji營ying養yang，才cai能neng經jing導dao管guan運yun往wang各ge個ge部bu位wei，樹shu體ti對dui氮dan的de吸xi收shou主zhu要yao是shi氨an態tai氮dan和he硝xiao態tai氮dan，而er經jing導dao管guan運yun輸shu的de主zhu要yao是shi有you機ji氮dan和he少shao量liang硝xiao態tai氮dan，磷lin和he硫liu的de吸xi收shou主zhu要yao是shi正zheng磷lin酸suan和he硫liu酸suan根gen離li子zi
，運yun輸shu還hai是shi以yi正zheng磷lin酸suan和he硫liu酸suan根gen離li子zi為wei主zhu，少shao量liang以yi有you機ji態tai運yun輸shu
；金屬離子吸收、運(yun)輸(shu)都(dou)是(shi)離(li)子(zi)狀(zhuang)態(tai)，由(you)此(ci)可(ke)見(jian)，導(dao)管(guan)運(yun)輸(shu)的(de)養(yang)分(fen)形(xing)態(tai)與(yu)根(gen)吸(xi)收(shou)的(de)不(bu)完(wan)全(quan)一(yi)致(zhi)
，所(suo)以(yi)不(bu)是(shi)任(ren)何(he)肥(fei)料(liao)都(dou)適(shi)於(yu)吊(diao)水(shui)，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)才(cai)適(shi)於(yu)吊(diao)水(shui)。

二、吊水補肥易出現的不良後果。進入樹體的肥液，若養分形態不宜
，可能會傷害導管組織；隨sui肥fei液ye進jin入ru的de一yi些xie樹shu體ti不bu需xu要yao的de物wu質zhi會hui對dui樹shu體ti生sheng長chang發fa育yu產chan生sheng影ying響xiang，甚shen至zhi產chan生sheng毒du害hai。由you於yu樹shu幹gan鑽zuan孔kong的de局ju限xian性xing

，進jin入ru樹shu體ti的de養yang分fen分fen布bu難nan以yi平ping衡heng，局ju部bu養yang分fen濃nong度du過guo高gao會hui對dui樹shu體ti產chan生sheng傷shang害hai，如ru：有的吊水後嫩葉
、花瓣邊緣焦枯
；有的枝條生長受阻，甚至枝組局部枯死。因此，正常樹沒有必要采用吊水的辦法補肥。

三、diaoshuibufeideyingyong。duiyugendexishougongnengjiaochade，huobiaoxianquesuzhengdeguoshu，kejiehezhibingcaiyongdiaoshuibufei。zheyangkeyiyouxiaobuchongyangfen，cujinguoshuzhengchangshengchang。ruchangzaizhiliaoguoshugenfubinghehuangyebingshihunjianiaosuxiaoguojiubucuo，niaosudenongduwei0.8%
，肥液的pH值在4.5左右。成年大梨樹單株肥液為3-4千克，但可能局部誘發小葉病，故應相應補鋅。

另ling外wai，吊diao水shui的de水shui質zhi要yao好hao，肥fei料liao的de純chun度du要yao高gao
，以yi免mian對dui樹shu體ti造zao成cheng傷shang害hai或huo毒du害hai。吊diao水shui補bu肥fei可ke在zai秋qiu季ji落luo葉ye後hou，或huo在zai春chun季ji樹shu液ye流liu動dong後hou至zhi萌meng芽ya前qian
，再zai遲chi易yi造zao成cheng危wei害hai。樹shu幹gan鑽zuan孔kong要yao注zhu意yi枝zhi幹gan中zhong導dao管guan的de上shang下xia聯lian係xi，盡jin量liang使shi肥fei液ye分fen散san。輸shu入ru樹shu體ti的de肥fei液ye由you於yu酸suan度du偏pian強qiang，致zhi使shi流liu經jing肥fei液ye的de木mu質zhi受shou到dao不bu同tong程cheng度du的de損sun傷shang
，連lian年nian吊diao水shui使shi木mu質zhi部bu受shou損sun，影ying響xiang了le樹shu體ti對dui養yang分fen的de正zheng常chang吸xi收shou和he運yun輸shu。因yin此ci
，不bu要yao對dui果guo樹shu連lian年nian吊diao水shui。吊diao水shui補bu肥fei並bing不bu治zhi本ben，隻zhi有you加jia大da投tou入ru，培pei肥fei地di力li，才cai能neng徹che底di解jie決jue土tu壤rang供gong肥fei不bu足zu的de矛mao盾dun。