當前,氣溫逐漸升高,棚室植株長勢逐漸增強。記者在壽光市洛城街道以及稻田鎮等地采訪的過程中了解到:當前很多棚室的春茬黃瓜、lajiaodengdouchuxianletuchangxianxiang,daozhihuangguacihuashuliangshao,lajiaoluohualuoguo,yingxiangleshucaidechanlianghepinzhi。ruheyufangzhizhutuchang,jizherenweiyingzuohaoyixiasidian。
首(shou)先(xian),控(kong)製(zhi)好(hao)夜(ye)間(jian)溫(wen)度(du)。春(chun)季(ji),氣(qi)溫(wen)回(hui)升(sheng)較(jiao)快(kuai),若(ruo)放(fang)風(feng)口(kou)關(guan)閉(bi)過(guo)早(zao)以(yi)及(ji)草(cao)苫(shan)覆(fu)蓋(gai)過(guo)早(zao),很(hen)容(rong)易(yi)使(shi)夜(ye)溫(wen)較(jiao)高(gao),呼(hu)吸(xi)消(xiao)耗(hao)營(ying)養(yang)過(guo)多(duo),引(yin)起(qi)蔬(shu)菜(cai)徒(tu)長(chang)。因(yin)此(ci),應(ying)根(gen)據(ju)棚(peng)室(shi)的(de)保(bao)溫(wen)情(qing)況(kuang)以(yi)及(ji)種(zhong)植(zhi)的(de)蔬(shu)菜(cai)種(zhong)類(lei)調(tiao)整(zheng)關(guan)風(feng)、放棚時間,在晴好天氣下,可在棚溫降至18℃左右關風、16℃左右放棚。將甜椒夜溫控製在15-17℃;黃瓜控製在13-15℃等deng。在zai天tian氣qi晴qing好hao的de夜ye晚wan,可ke適shi當dang晚wan蓋gai或huo不bu蓋gai浮fu膜mo,也ye可ke將jiang草cao苫shan少shao放fang幾ji個ge,采cai用yong卷juan簾lian機ji可ke分fen次ci放fang棚peng,第di一yi次ci先xian放fang到dao棚peng麵mian一yi半ban的de位wei置zhi。但dan是shi,春chun季ji一yi定ding要yao及ji時shi收shou聽ting天tian氣qi預yu報bao,在zai“倒春寒”天氣來臨前,做好保溫工作。
qici,helijiaoshuishifei。chunjiqiwenhuishenghou,shucaishengchangjiakuai,weimanzuzhizhushengchangsuoxu,henduocainongjiaoshuishifeiliangjiada,shizhizhuchuxianletuchangxianxiang。yinci,weifangzhizhizhuchuxiantuchang,yidingyaohelijiaoshuishifei,erqieyinggenjuzhizhudechangshijizuoguoqingkuang,ruchunchahuangguazuoguoqiankexianbuchongfei,qieweipeiyuzhuangkebukejiaoshuiguoduo。
zaici,shishishiliangliuguo。duiyuchunchahuanggua,ruozhizhutuchang,keshidangzaoliugengua,cushizhizhuyouyingyangshengchangxiangshengzhishengchangzhuanbian,jinertiaokongzhizhuchangshi。danshigenguayingshishishuchu,yimianzhuizhukezi,yingxianghouqizuoguo。duiyuyidachacaijiao,ruozhizhuchangshiwang,kecaiquduoliuguokongkezaishuguodezuofatiaokong。
最後,噴用植物生長調節劑。植株在發生徒長後,可用助壯素750-1000倍或矮壯素1500-2000倍噴霧控製;但是春季使用生長抑製劑時不僅要注意使用量,而且一定要注意天氣情況,由於春季天氣多變,在氣溫回升後,可能有“倒春寒”天(tian)氣(qi)發(fa)生(sheng)。在(zai)噴(pen)用(yong)生(sheng)長(chang)抑(yi)製(zhi)劑(ji)後(hou),一(yi)旦(dan)氣(qi)溫(wen)下(xia)降(jiang),在(zai)低(di)溫(wen)和(he)生(sheng)長(chang)抑(yi)製(zhi)劑(ji)的(de)雙(shuang)重(zhong)作(zuo)用(yong)下(xia),很(hen)容(rong)易(yi)造(zao)成(cheng)蔬(shu)菜(cai)控(kong)長(chang)過(guo)度(du)。因(yin)此(ci),春(chun)季(ji)植(zhi)物(wu)生(sheng)長(chang)抑(yi)製(zhi)劑(ji)使(shi)用(yong)一(yi)定(ding)要(yao)謹(jin)慎(shen),使(shi)用(yong)時(shi)需(xu)關(guan)注(zhu)天(tian)氣(qi)預(yu)報(bao)。
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