筆(bi)者(zhe)多(duo)年(nian)從(cong)事(shi)棚(peng)菜(cai)生(sheng)產(chan)技(ji)術(shu)指(zhi)導(dao)
，發(fa)現(xian)即(ji)使(shi)是(shi)多(duo)年(nian)從(cong)事(shi)棚(peng)菜(cai)生(sheng)產(chan)的(de)農(nong)民(min)朋(peng)友(you)也(ye)常(chang)常(chang)在(zai)大(da)棚(peng)通(tong)風(feng)換(huan)氣(qi)技(ji)巧(qiao)方(fang)麵(mian)出(chu)現(xian)差(cha)錯(cuo)

，給(gei)生(sheng)產(chan)者(zhe)帶(dai)來(lai)不(bu)必(bi)要(yao)的(de)損(sun)失(shi)。因(yin)此(ci)，與(yu)農(nong)民(min)朋(peng)友(you)探(tan)討(tao)大(da)棚(peng)蔬(shu)菜(cai)栽(zai)培(pei)通(tong)風(feng)換(huan)氣(qi)方(fang)麵(mian)的(de)學(xue)問(wen)很(hen)有(you)必(bi)要(yao)。冬(dong)春(chun)季(ji)節(jie)

，種(zhong)植(zhi)蔬(shu)菜(cai)的(de)大(da)棚(peng)如(ru)何(he)進(jin)行(xing)通(tong)風(feng)換(huan)氣(qi)呢(ne)
？

必須明確大棚通風換氣的目的是調節棚內的溫度、濕shi度du和he二er氧yang化hua碳tan的de濃nong度du以yi及ji排pai出chu有you害hai氣qi體ti。正zheng確que適shi宜yi地di把ba握wo通tong風feng換huan氣qi技ji術shu尤you為wei重zhong要yao。農nong民min朋peng友you在zai實shi際ji生sheng產chan和he操cao作zuo過guo程cheng中zhong，應ying注zhu意yi以yi下xia原yuan則ze和he措cuo施shi。

1.溫度：dapengtongfengshibixuzaipengneidewendugaoyushiyiyujutishucaishengchangdewendushifangkejinxing
，yimianyinfangfenghoushineiwenduguodiduigaizhongshucaizaochenglenghaihuodonghai。yincibixulejiehezhangwogezhongshucaideshengchangfayugegejieduanduiwendudeyaoqiu。

2.放風量：大棚通風時要堅持從小到大，由少到多
，順風向放風的原則。同時，也要注意調節棚內局部溫差，在高溫處要相對早通風

，放較大風口；在(zai)低(di)溫(wen)處(chu)要(yao)相(xiang)對(dui)晚(wan)放(fang)風(feng)，放(fang)小(xiao)風(feng)口(kou)。關(guan)閉(bi)放(fang)風(feng)口(kou)時(shi)則(ze)應(ying)該(gai)由(you)大(da)到(dao)小(xiao)
，由(you)多(duo)到(dao)少(shao)逐(zhu)步(bu)進(jin)行(xing)。另(ling)外(wai)通(tong)風(feng)換(huan)氣(qi)時(shi)應(ying)防(fang)止(zhi)冷(leng)風(feng)直(zhi)接(jie)吹(chui)向(xiang)棚(peng)內(nei)蔬(shu)菜(cai)植(zhi)株(zhu)，導(dao)致(zhi)溫(wen)度(du)忽(hu)高(gao)忽(hu)低(di)
，造(zao)成(cheng)蔬(shu)菜(cai)葉(ye)片(pian)和(he)幼(you)果(guo)遭(zao)受(shou)冷(leng)凍(dong)傷(shang)害(hai)。

3.通風換氣的時間要求：放(fang)風(feng)換(huan)氣(qi)的(de)目(mu)的(de)是(shi)排(pai)濕(shi)和(he)降(jiang)溫(wen)，滿(man)足(zu)棚(peng)內(nei)蔬(shu)菜(cai)光(guang)合(he)作(zuo)用(yong)對(dui)二(er)氧(yang)化(hua)碳(tan)的(de)需(xu)求(qiu)。因(yin)此(ci)，通(tong)風(feng)換(huan)氣(qi)的(de)時(shi)間(jian)一(yi)般(ban)應(ying)在(zai)棚(peng)內(nei)溫(wen)度(du)過(guo)高(gao)，相(xiang)對(dui)濕(shi)度(du)較(jiao)大(da)，光(guang)合(he)作(zuo)用(yong)加(jia)快(kuai)時(shi)進(jin)行(xing)，也(ye)就(jiu)是(shi)說(shuo)在(zai)晴(qing)天(tian)的(de)上(shang)午(wu)揭(jie)簾(lian)後(hou)1—2xiaoshikaishijinxing。lingwai，zaijiaoshuishifeihuopensanongyaohou
，youyushiduzengda
，yeyingduanshitongfeng。erzaiyinxuetianqi，dangshineixiangduishiduda，eryanghuatanchuxiankuiquejiyouhaiqitijileideqingkuangxia，yeyinggaijinxingduanshijianjielianfangxiaofeng
，yimanzushucaiduieryanghuatandexuqiu。lingwaiyenengjiangdizhizhutineiyangfenxiaohao，tigaozhizhukanghannengli。ruyudaojiuyintuqingshi

，yaoduipengwaifugaiwujinxingjiangejielian，fangfengliangyaoxiao
，yifangguangzhaoguoqiang，zhengtengjiaju，zaochengshucaishishuiweinian。

總之，冬春季節，栽培棚菜通風換氣的學問應綜合應用，積累經驗，有必要經常與農技人員進行谘詢和交流。