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、辣la椒jiao等deng都dou出chu現xian了le徒tu長chang現xian象xiang,導dao致zhi黃huang瓜gua雌ci花hua數shu量liang少shao,辣la椒jiao落luo花hua落luo果guo,影ying響xiang了le蔬shu菜cai的de產chan量liang和he品pin質zhi。如ru何he預yu防fang植zhi株zhu徒tu長chang,記ji者zhe認ren為wei應ying做zuo好hao以yi下xia四si點dian。
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。
再zai次ci,適shi時shi適shi量liang留liu果guo。對dui於yu春chun茬cha黃huang瓜gua,若ruo植zhi株zhu徒tu長chang,可ke適shi當dang早zao留liu根gen瓜gua,促cu使shi植zhi株zhu由you營ying養yang生sheng長chang向xiang生sheng殖zhi生sheng長chang轉zhuan變bian,進jin而er調tiao控kong植zhi株zhu長chang勢shi。但dan是shi根gen瓜gua應ying適shi時shi疏shu除chu,以yi免mian墜zhui住zhu棵ke子zi,影ying響xiang後hou期qi坐zuo果guo。對dui於yu一yi大da茬cha彩cai椒jiao,若ruo植zhi株zhu長chang勢shi旺wang,可ke采cai取qu多duo留liu果guo控kong棵ke再zai疏shu果guo的de做zuo法fa調tiao控kong。
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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