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。
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