1.yinxuetianbixujiekaibufencaoshan,shizhizhunenggoujinxingweiruodeguanghezuoyong,yiweichizhizhuhuanmanshengchangfayusuoxuyaodeyingyang。qianwanbukezhengtianbujiecaoshan,shishucaizaiheianzhongduguobaitian,zheyanghuizaochengshifenbulishucaiyangmiaoshengchangdeanhuxihuanjing,yejiyiyinfagezhongbinghai,chaoguoliangtianbujiecaoshan,jiuhuizaochengshucaiyangmiaodeweinianhuosiwang。
2.zaijiangxuetian,qiwenbutaidishi,jinliangjuanqicaoshan,rangxuezhijieluozaipengmoshang,bianyujishiqingsao。pengmoshangyoujixueyeyouyidingbaowenzuoyong。danyuxueguohouyidingyaojishiqingsaojixue、放苫保溫。雪大時還需隨下隨清掃,以防溫室被壓塌。
3.陰雪天棚內氣溫隻要短時間在蔬菜生長臨界溫度以上(果菜類10℃~12℃,葉菜類1℃~3℃)就不用加溫,讓蔬菜秧苗在低溫下度過災害性天氣,減少體內營養消耗,有利於晴天後的恢複生長。
4.連陰雪天後溫室蔬菜須防閃苗。連陰雪天導致地溫偏低、根(gen)係(xi)吸(xi)水(shui)能(neng)力(li)差(cha),晴(qing)後(hou)突(tu)然(ran)揭(jie)苫(shan),溫(wen)室(shi)的(de)氣(qi)溫(wen)升(sheng)高(gao)迅(xun)速(su),會(hui)導(dao)致(zhi)作(zuo)物(wu)地(di)上(shang)部(bu)分(fen)失(shi)水(shui)萎(wei)蔫(nian)甚(shen)至(zhi)死(si)亡(wang),瓜(gua)類(lei)作(zuo)物(wu)尤(you)為(wei)嚴(yan)重(zhong)。因(yin)此(ci)在(zai)晴(qing)天(tian)後(hou),葉(ye)片(pian)如(ru)出(chu)現(xian)輕(qing)度(du)萎(wei)蔫(nian)時(shi),就(jiu)應(ying)放(fang)下(xia)一(yi)部(bu)分(fen)草(cao)苫(shan)遮(zhe)光(guang),可(ke)隔(ge)一(yi)放(fang)一(yi),待(dai)萎(wei)蔫(nian)恢(hui)複(fu)後(hou),再(zai)度(du)卷(juan)起(qi)草(cao)苫(shan),萎(wei)蔫(nian)再(zai)度(du)出(chu)現(xian),可(ke)再(zai)將(jiang)草(cao)苫(shan)放(fang)下(xia),這(zhe)樣(yang)反(fan)複(fu)幾(ji)次(ci),一(yi)般(ban)的(de)萎(wei)蔫(nian)即(ji)可(ke)恢(hui)複(fu)。當(dang)下(xia)午(wu)陽(yang)光(guang)弱(ruo),揭(jie)苫(shan)不(bu)再(zai)萎(wei)蔫(nian)時(shi),停(ting)止(zhi)進(jin)行(xing)局(ju)部(bu)遮(zhe)光(guang)。天(tian)黑(hei)時(shi)及(ji)早(zao)放(fang)下(xia)草(cao)苫(shan)保(bao)溫(wen),並(bing)加(jia)強(qiang)夜(ye)間(jian)保(bao)溫(wen)。
5.低於臨界溫度時,采取增強保溫的措施。(1)準備一定數量的草苫,降溫時在棚前底角處圍裹一圈,可有效提高棚前端溫度。(2)在草苫上加蓋一層舊棚膜。(3)溫室後屋麵下加掛草袋。(4)溫室加掛厚的棉門簾,靠溫室進門處設圍簾。(5)雨雪來臨時在大行間鋪麥草、牛糞等,有利於提高地溫、調節溫度。
6.采取臨時性補溫措施。有條件的溫室,每隔6米掛1個白熾燈或浴霸燈,在遇連續陰、雪天氣時開燈補充光照,提高溫室。沒有電的溫室,可用煤爐增溫,要注意安裝好排煙管道。
7.控(kong)製(zhi)棚(peng)內(nei)濕(shi)度(du)。溫(wen)室(shi)蔬(shu)菜(cai)自(zi)始(shi)至(zhi)終(zhong)都(dou)要(yao)嚴(yan)格(ge)控(kong)製(zhi)澆(jiao)水(shui),尤(you)其(qi)是(shi)在(zai)陰(yin)雪(xue)天(tian),一(yi)定(ding)不(bu)要(yao)澆(jiao)水(shui),以(yi)防(fang)止(zhi)傷(shang)根(gen)。如(ru)果(guo)棚(peng)內(nei)濕(shi)度(du)過(guo)大(da),要(yao)及(ji)時(shi)通(tong)風(feng)排(pai)濕(shi);不能通風時,可在行間撒草木灰或細幹土吸濕。
手機版




