蔬菜葉片萎蔫的生理表現是因葉片蒸騰失水，根部供應不足所致，嚴重時會造成葉片幹枯，植株死亡。

根部受到傷害會導致供向葉片的水不足，除幹旱外，土壤鹽堿
、化肥過量施用是常見的原因。土壤中的水分會因鹽堿和化肥施用量過多而“離子濃度過高”
，使(shi)滲(shen)透(tou)壓(ya)升(sheng)高(gao)，造(zao)成(cheng)根(gen)係(xi)吸(xi)水(shui)困(kun)難(nan)。縱(zong)然(ran)土(tu)中(zhong)不(bu)缺(que)水(shui)


，也(ye)會(hui)發(fa)生(sheng)萎(wei)蔫(nian)現(xian)象(xiang)。所(suo)以(yi)要(yao)防(fang)鹽(yan)堿(jian)並(bing)控(kong)製(zhi)好(hao)化(hua)肥(fei)使(shi)用(yong)量(liang)。濫(lan)用(yong)化(hua)肥(fei)常(chang)會(hui)造(zao)成(cheng)土(tu)地(di)鹽(yan)堿(jian)
，蔬(shu)菜(cai)萎(wei)蔫(nian)就(jiu)是(shi)不(bu)可(ke)避(bi)免(mian)了(le)。有(you)機(ji)肥(fei)未(wei)經(jing)腐(fu)熟(shu)就(jiu)使(shi)用(yong)
，在(zai)數(shu)量(liang)大(da)、貼近根係時也會“燒根”造zao成cheng蔬shu菜cai萎wei蔫nian。因yin此ci畜chu禽qin禽qin糞fen便bian等deng有you機ji肥fei一yi定ding要yao先xian腐fu熟shu再zai使shi用yong。地di溫wen過guo低di也ye會hui使shi根gen受shou傷shang，引yin發fa供gong水shui不bu足zu而er致zhi葉ye子zi萎wei蔫nian。因yin此ci冬dong春chun季ji棚peng室shi蔬shu菜cai生sheng產chan中zhong要yao嚴yan防fang冷leng風feng進jin棚peng使shi地di溫wen過guo度du下xia降jiang。

蔬菜根部病害會使根喪失吸收水分的功能或使輸導受阻使葉片萎蔫。要嚴加防範根結線蟲病、枯萎病
、立(li)枯(ku)病(bing)等(deng)病(bing)害(hai)。有(you)的(de)細(xi)菌(jun)病(bing)會(hui)在(zai)維(wei)管(guan)束(shu)中(zhong)產(chan)生(sheng)菌(jun)膿(nong)，阻(zu)斷(duan)水(shui)分(fen)向(xiang)上(shang)運(yun)輸(shu)，會(hui)使(shi)蔬(shu)菜(cai)上(shang)部(bu)萎(wei)蔫(nian)，有(you)時(shi)菌(jun)膿(nong)的(de)阻(zu)斷(duan)僅(jin)發(fa)生(sheng)在(zai)個(ge)別(bie)分(fen)枝(zhi)上(shang)，就(jiu)會(hui)使(shi)個(ge)別(bie)枝(zhi)條(tiao)發(fa)生(sheng)葉(ye)子(zi)萎(wei)蔫(nian)。常(chang)說(shuo)的(de)青(qing)枯(ku)病(bing)就(jiu)是(shi)這(zhe)種(zhong)情(qing)況(kuang)。細(xi)菌(jun)性(xing)病(bing)害(hai)需(xu)用(yong)銅(tong)製(zhi)劑(ji)
、鏈黴素等上麵噴、下麵灌，兩麵夾擊進行防治。

zaochengsunshiyanzhongdeyizhongweinianshiyoutianqibianhuayinfa，changfashengzaipengshishucaishang。zaijiaochangshijiantianqilianyinhou，ruguoturanbianqing，shucaihuichanshengyixiliebushi，eryinfayanzhongweinian，shenzhidaliangsike。zheshiyinweichangshijiandeyinyu，guangzhaoruo，shucaiguanghechanwubuzu
，genbuyinyingyangquefa，shengchanghexishounenglixiajiang，zaochenggongshuibuzuwenti。yeyinyinyutianshiwendudi，shiduzengjia，yepiandeshuifenzhengfaliangbiandehenxiao，ertianturanzhuanqingshi，pengshizhongwendushangshenghenkuai
，zaiduanduanbanxiaoshineikeshangsheng10℃~15℃
，wendudejishengshishiduhenkuaixiajiang
，congershiyepianzhengfaliangzhouranshenggao。dancishidiwenshengdeman，genjiwendubingweimingxianshenggao，genxishenglihuodongyejiaocha，xishoudeshuifenbunengmanzuyezidezhengfa
，biaoxianweigongshuibuzu。jiazhiguangzhaoturanzengqiang，yezituranweinianyejiushichengweibirandele。

解(jie)決(jue)這(zhe)種(zhong)突(tu)然(ran)萎(wei)蔫(nian)，須(xu)在(zai)天(tian)轉(zhuan)晴(qing)時(shi)控(kong)製(zhi)棚(peng)室(shi)升(sheng)溫(wen)速(su)度(du)，延(yan)長(chang)升(sheng)溫(wen)時(shi)間(jian)，使(shi)蔬(shu)菜(cai)有(you)一(yi)個(ge)適(shi)應(ying)過(guo)程(cheng)。萎(wei)蔫(nian)嚴(yan)重(zhong)時(shi)，應(ying)立(li)即(ji)放(fang)草(cao)苫(shan)子(zi)等(deng)遮(zhe)蔭(yin)，並(bing)向(xiang)葉(ye)片(pian)噴(pen)水(shui)
，使(shi)葉(ye)片(pian)恢(hui)複(fu)正(zheng)常(chang)。過(guo)一(yi)段(duan)時(shi)間(jian)再(zai)逐(zhu)步(bu)把(ba)草(cao)苫(shan)子(zi)放(fang)開(kai)
，需(xu)1~3小時才能全放開

，具體時間長短要看葉片恢複狀況。冬天向葉片噴的水不能太冷，也可加入人治感冒用的“阿司匹林”
，15公斤水中加入2～3ke

，qidaolinshiguanbiqikongfangshuifenzhengfadezuoyong。zongzhifangzhizhezhongweinianguanjianshizuohaoyouyinyutianxiangqingtiandehuanmanguodu，zhubushishucaijianguang，youyigejiaochangshijiandeshiyingguocheng，libituranjianqiangguang
，yimianpengneiwenduyixiazitidetaigao，shishuifengongqiushangxiatuojie。