ganhanqihoutiaojianxiashengchangdeyanyehanshuiliangdi,caixiadeyanyebianhuangjiaoman,tebieshishangbuye,bianhuangsudugenghuanman。hongkaozheyileiyanyedeguanjianzaiyubaoshi,bingshidangyanchangbianhuangqi。因此,在變黃初期,要嚴密關閉天窗和地洞,最好用稀泥塗封。若烤房內相對濕度低於百分之八十,即幹濕球溫度差在3度以上,要在烤房地上撥水加濕,或放入濕麻袋加濕,或從天窗口往煙葉撒水,以增加烤房內濕度,促使煙葉變黃。
幹旱氣候條件下生長的煙葉兩種情況。
yizhongshichurangfeilicha,tebieshidansuhanliangdi,zaitianqiganhantiaojianxiayanyedeyelingbugou,yehanshuiliangshao,yexiaoerbo,wangwangzaoshu,hongkaozhezhongyanyebianhuangqiwenduyaogaoxie,shengwensudukekuaiyixie,yimianyanyebianchengquanhuang,yinweiquanhuangyichubaihuangyan。youyuyanyehanshuiliangdi,yaocaiqujiashicuoshi。zhuanhuodingsechengdubunengtaigao,yibandangyanyebianhuang5─6成時溫度即可達到攝氏45度,轉入定色期。定色期升溫宜慢,使未完成變黃到煙葉繼續變黃。
另(ling)一(yi)種(zhong)是(shi)出(chu)壤(rang)比(bi)較(jiao)肥(fei)沃(wo),但(dan)因(yin)天(tian)氣(qi)長(chang)期(qi)幹(gan)旱(han)而(er)逼(bi)熟(shu)的(de)煙(yan)葉(ye)。這(zhe)類(lei)葉(ye)片(pian)未(wei)真(zhen)正(zheng)成(cheng)熟(shu),葉(ye)片(pian)厚(hou),含(han)水(shui)量(liang)小(xiao),烘(hong)烤(kao)時(shi)煙(yan)葉(ye)內(nei)水(shui)分(fen)難(nan)以(yi)汽(qi)化(hua)排(pai)出(chu),不(bu)易(yi)失(shi)水(shui)發(fa)軟(ruan),也(ye)不(bu)易(yi)變(bian)黃(huang)。烘(hong)烤(kao)時(shi),這(zhe)一(yi)類(lei)煙(yan)裝(zhuang)煙(yan)要(yao)密(mi)些(xie),天(tian)窗(chuang)和(he)地(di)洞(dong)嚴(yan)格(ge)密(mi)封(feng),並(bing)采(cai)取(qu)加(jia)濕(shi)措(cuo)施(shi)。在(zai)變(bian)黃(huang)初(chu)期(qi)采(cai)用(yong)攝(she)氏(shi)36度以下的溫度,保持較高的相對濕度。升溫要緩慢進行,使煙葉在攝氏42度以前充分變黃後再升溫和少量排濕。攝氏45-46度要延長時間。進入定色期時,升溫要慢,如升溫過急,煙葉易變褐;變黃程度要高一些。轉入定色期早時,容易造成煙葉回青。待整個烤房內煙葉都勾尖卷邊後,即按一般方法進行下一階段的烘烤。
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