冬季蔬菜大棚裏的氣害(氨氣)和風害(穿堂風)兩大隱害就好比兩大 隱yin形xing殺sha手shou,雖sui然ran看kan不bu見jian摸mo不bu著zhe,但dan它ta們men的de危wei害hai程cheng度du卻que不bu可ke小xiao覷qu。特te別bie是shi在zai蔬shu菜cai進jin入ru以yi保bao溫wen為wei主zhu的de管guan理li階jie段duan後hou,這zhe兩liang大da隱yin形xing殺sha手shou成cheng了le危wei害hai蔬shu菜cai生sheng產chan的de主zhu凶xiong,如ru不bu對dui它ta們men重zhong視shi和he進jin行xing有you效xiao的de預yu防fang,就jiu會hui對dui蔬shu菜cai造zao成cheng嚴yan重zhong危wei害hai。
氣害的危害及預防。從某種程度上講,氣害比病害、chonghaigengweikepa,yintachanghuizaijiaoduanshijianneixunhuaishucai,shishucaidafujianchan,pinzhiyanzhongxiajiang。qihaidechanshengchuledongjidanfeiheqinfenyongduole,shipengneianqijileiguoduoyiwai,haiyindapengshucaizaozaidingzhiqianjiushiyongledaliangdejifen,zhexiejifenpingshijiuhuihuifachuanqi,danyouyuhuifaliangjiaoshao,kuangqiedapengqianqitongfengjiaohao,yincibuhuichanshengqihai。dansuizhetianqizhujianbianleng,dapengmibihou,anqihuifabuchuqu,zaipengneijileideduole,jiuduishucaizaochengleweihai。youqishizaichongshishengwujunfeihou,jifenfushusuduturanjiakuaile。zheshi,jishidongjibudaliangshiyongdanfeiheqinfei,zhiyaoqianqidaliangshiyongle,qiqihaideweihaiyejiubukebimian。ruguozaijiashangpengshizhongchongshianleifeiliaoguoduo,chanshengyaxiaosuanqiti;采用爐火加溫,產生一氧化碳和二氧化硫;某mou些xie棚peng膜mo揮hui發fa的de有you害hai氣qi體ti加jia在zai一yi起qi,其qi危wei害hai的de程cheng度du就jiu可ke想xiang而er知zhi了le。所suo以yi,冬dong季ji棚peng室shi在zai做zuo好hao保bao溫wen工gong作zuo的de同tong時shi,一yi定ding要yao注zhu意yi適shi當dang通tong風feng,以yi防fang有you害hai氣qi體ti積ji累lei,預yu防fang對dui蔬shu菜cai的de生sheng長chang產chan生sheng危wei害hai。
風feng害hai的de危wei害hai和he預yu防fang。穿chuan堂tang風feng是shi冬dong季ji棚peng室shi門men口kou或huo放fang風feng口kou關guan閉bi不bu嚴yan而er造zao成cheng的de冷leng空kong氣qi急ji速su對dui流liu,這zhe種zhong風feng對dui蔬shu菜cai生sheng長chang影ying響xiang非fei常chang大da。一yi陣zhen冷leng風feng撲pu過guo後hou,蔬shu菜cai輕qing則ze生sheng長chang不bu良liang,重zhong則ze葉ye片pian萎wei蔫nian、落花落果。盡管它的破壞力比氣害小,但也常讓菜農頭疼不已。預防穿堂風最有效的措施就是在門口、放(fang)風(feng)口(kou)處(chu)設(she)擋(dang)風(feng)膜(mo),以(yi)緩(huan)衝(chong)穿(chuan)堂(tang)風(feng)對(dui)蔬(shu)菜(cai)的(de)直(zhi)吹(chui)。尤(you)其(qi)是(shi)在(zai)門(men)口(kou)處(chu),除(chu)設(she)置(zhi)擋(dang)風(feng)膜(mo)外(wai),棚(peng)門(men)最(zui)好(hao)掛(gua)棉(mian)門(men)簾(lian),既(ji)保(bao)溫(wen)又(you)擋(dang)風(feng),可(ke)有(you)效(xiao)阻(zu)擋(dang)穿(chuan)堂(tang)風(feng)的(de)進(jin)入(ru)。對(dui)於(yu)受(shou)穿(chuan)堂(tang)風(feng)為(wei)害(hai)的(de)蔬(shu)菜(cai),應(ying)及(ji)時(shi)用(yong)葉(ye)麵(mian)肥(fei)或(huo)植(zhi)物(wu)生(sheng)長(chang)調(tiao)節(jie)劑(ji)葉(ye)麵(mian)噴(pen)灑(sa),促(cu)進(jin)盡(jin)快(kuai)恢(hui)複(fu)生(sheng)長(chang)。
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