隨著冬季到來,白菜類、綠lv葉ye菜cai類lei及ji根gen莖jing類lei秋qiu菜cai,要yao停ting止zhi澆jiao水shui施shi肥fei,密mi切qie關guan注zhu天tian氣qi變bian化hua,及ji時shi收shou獲huo上shang市shi。因yin空kong氣qi濕shi度du較jiao大da,芹qin菜cai和he韭jiu菜cai等deng群qun體ti鬱yu閉bi,易yi感gan染ran傳chuan染ran性xing病bing害hai,要yao加jia強qiang病bing害hai防fang控kong,分fen期qi分fen批pi上shang市shi。
同時及早安排設施蔬菜冬季管理,措施如下:
zhuyifangfengfangxue。dafengtianqiyaoyajinyamosheng,bingzaicaoshanhewaifumoshang,andongxihengxiangyalianggentaobutaodexigangsuo,nengyouxiaofangzhidafengjiangcaoshanliantongwaifumochuiqi。dafengtianyaojiangtongfengkoumibi,fangzhidafengchuiruwenshi。xiaxuetianqiyaojizaofugaicaoshan,caoshanshangjiagaiyicengfangyuxuedebomo,bingzaixuehoujishiqingsaojixue。yekeshixianzhunbeiyibufenbeiyonglizhu,ruxuexiadeguoda,zaijuwenshiqianyan3米處加上立柱,以防積雪壓塌棚體。
控製棚室溫度。冬季低溫,要堅持“晚揭早蓋”。上午拉開草苫後,要確保室內溫度不降低,下午在棚室內溫度下降到20℃時,要及時蓋草苫,以保持室溫。
做好水肥管理。在11月中下旬,應選晴天澆水,深冬季節盡量不澆水。蔬菜表現缺水時,可選天氣晴朗的好天,采用膜下滴灌、微噴灌或膜下澆小水,避免大水降低地溫。冬季蔬菜生長緩慢,需肥少,追肥應以腐熟的有機肥和生物菌肥為主,最好配合滴灌、微噴灌施入,實行水肥一體化管理,也可選晴朗天氣,配合噴施防病藥劑進行葉麵追肥。
連陰天的應對措施。在連陰(雪)天(tian),盡(jin)量(liang)少(shao)通(tong)風(feng),下(xia)午(wu)稍(shao)提(ti)早(zao)蓋(gai)草(cao)苫(shan),使(shi)溫(wen)室(shi)內(nei)積(ji)蓄(xu)較(jiao)多(duo)熱(re)量(liang)。隻(zhi)要(yao)天(tian)氣(qi)無(wu)雪(xue),可(ke)於(yu)中(zhong)午(wu)前(qian)揭(jie)苫(shan),充(chong)分(fen)利(li)用(yong)散(san)射(she)光(guang),有(you)補(bu)光(guang)條(tiao)件(jian)可(ke)同(tong)時(shi)開(kai)燈(deng)補(bu)光(guang),午(wu)後(hou)及(ji)早(zao)蓋(gai)苫(shan)。如(ru)夜(ye)間(jian)溫(wen)度(du)低(di),有(you)條(tiao)件(jian)的(de)可(ke)以(yi)適(shi)當(dang)補(bu)溫(wen)。天(tian)氣(qi)轉(zhuan)晴(qing)後(hou)要(yao)逐(zhu)漸(jian)揭(jie)苫(shan),如(ru)發(fa)現(xian)植(zhi)株(zhu)葉(ye)片(pian)萎(wei)蔫(nian)應(ying)隨(sui)即(ji)回(hui)蓋(gai),待(dai)植(zhi)株(zhu)恢(hui)複(fu)後(hou)再(zai)逐(zhu)步(bu)揭(jie)苫(shan)。
病害防治。減輕日光溫室蔬菜病害發生,要盡量降低溫室內空氣濕度,在用藥防治蔬菜病害時,盡量選用粉塵劑或煙霧劑。
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