進(jin)入(ru)夏(xia)季(ji)後(hou),近(jin)期(qi)降(jiang)水(shui)明(ming)顯(xian)增(zeng)多(duo),從(cong)下(xia)周(zhou)的(de)天(tian)氣(qi)預(yu)報(bao)情(qing)況(kuang)看(kan),仍(reng)有(you)降(jiang)雨(yu)天(tian)氣(qi)。在(zai)多(duo)雨(yu)季(ji)節(jie)棚(peng)室(shi)管(guan)理(li)上(shang)應(ying)注(zhu)意(yi)哪(na)些(xie)問(wen)題(ti)呢(ne)?記(ji)者(zhe)認(ren)為(wei)應(ying)注(zhu)意(yi)以(yi)下(xia)三(san)點(dian):
shouxian,guanzhutianqiyubao,yuqianjishiguanbitongfengkou,yanfangyushuijinpeng。yushuijinpenghou,bujinrongyidaozhibinghaidefasheng,erqiehuidaozhiturangyanzihua,lingwai,yushuijinpeng,haihuidaozhiougen,yingxianggenxiduishuifenheyangfendexishounengli。ruoyushuijinpeng,yingjishipaichuyushui,baochiturangshirun,zaiweipudimodeqingkuangxia,keshidanghuachuzengjiaturangdetongtouxing,geigenxichuangzaoshiyidehuanjingtiaojian。
其(qi)次(ci),降(jiang)低(di)棚(peng)內(nei)濕(shi)度(du),預(yu)防(fang)病(bing)害(hai)發(fa)生(sheng)。夏(xia)季(ji)氣(qi)溫(wen)較(jiao)高(gao),在(zai)多(duo)雨(yu)季(ji)節(jie),棚(peng)內(nei)的(de)濕(shi)度(du)較(jiao)大(da),高(gao)溫(wen)高(gao)濕(shi)的(de)環(huan)境(jing)條(tiao)件(jian)下(xia)很(hen)容(rong)易(yi)誘(you)發(fa)病(bing)害(hai)的(de)發(fa)生(sheng),如(ru)黃(huang)瓜(gua)的(de)褐(he)斑(ban)病(bing)、西紅柿的早疫病等,為防止病害的發生,雨季一定要注意降低棚內濕度,主要從以下三方麵入手:第(di)一(yi),加(jia)強(qiang)通(tong)風(feng),雨(yu)停(ting)後(hou)及(ji)時(shi)拉(la)開(kai)放(fang)風(feng)口(kou)通(tong)風(feng),進(jin)行(xing)短(duan)時(shi)間(jian)的(de)通(tong)風(feng)排(pai)濕(shi)。第(di)二(er),嚴(yan)禁(jin)雨(yu)前(qian)以(yi)及(ji)雨(yu)天(tian)澆(jiao)水(shui),以(yi)免(mian)增(zeng)加(jia)棚(peng)內(nei)的(de)濕(shi)度(du)。第(di)三(san),雨(yu)期(qi)急(ji)需(xu)噴(pen)藥(yao)防(fang)病(bing)時(shi),應(ying)盡(jin)量(liang)避(bi)免(mian)噴(pen)霧(wu),可(ke)采(cai)用(yong)噴(pen)粉(fen)以(yi)及(ji)煙(yan)熏(xun)的(de)辦(ban)法(fa)。
再zai次ci,久jiu陰yin乍zha晴qing的de情qing況kuang下xia要yao早zao防fang蔬shu菜cai萎wei蔫nian。在zai夏xia季ji連lian續xu陰yin雨yu天tian過guo後hou,蔬shu菜cai組zu織zhi較jiao幼you嫩nen,突tu然ran遇yu到dao晴qing好hao天tian氣qi,光guang照zhao過guo強qiang,不bu僅jin會hui灼zhuo傷shang葉ye片pian,而er且qie在zai高gao溫wen強qiang光guang下xia很hen容rong易yi造zao成cheng葉ye片pian萎wei蔫nian。為wei防fang止zhi植zhi株zhu萎wei蔫nian,應ying做zuo好hao以yi下xia兩liang點dian:第(di)一(yi),緩(huan)慢(man)放(fang)風(feng)。久(jiu)陰(yin)乍(zha)晴(qing)後(hou),若(ruo)突(tu)然(ran)放(fang)風(feng)過(guo)大(da),棚(peng)內(nei)濕(shi)度(du)降(jiang)低(di),葉(ye)片(pian)蒸(zheng)騰(teng)量(liang)增(zeng)大(da),根(gen)係(xi)不(bu)能(neng)及(ji)時(shi)供(gong)應(ying)水(shui)分(fen),很(hen)容(rong)易(yi)造(zao)成(cheng)植(zhi)株(zhu)萎(wei)蔫(nian)。可(ke)緩(huan)慢(man)放(fang)風(feng),逐(zhu)漸(jian)加(jia)大(da)通(tong)風(feng)量(liang)。第(di)二(er),及(ji)時(shi)設(she)置(zhi)遮(zhe)陽(yang)網(wang)。為(wei)防(fang)止(zhi)植(zhi)株(zhu)受(shou)到(dao)強(qiang)光(guang)照(zhao)射(she),可(ke)在(zai)中(zhong)午(wu)強(qiang)光(guang)下(xia),及(ji)時(shi)設(she)置(zhi)遮(zhe)陽(yang)網(wang),防(fang)止(zhi)高(gao)溫(wen)危(wei)害(hai)。若(ruo)植(zhi)株(zhu)出(chu)現(xian)輕(qing)微(wei)的(de)萎(wei)蔫(nian)以(yi)及(ji)葉(ye)片(pian)幹(gan)邊(bian)的(de)情(qing)況(kuang),可(ke)及(ji)時(shi)噴(pen)灑(sa)清(qing)水(shui),能(neng)有(you)效(xiao)緩(huan)解(jie)症(zheng)狀(zhuang);嚴重時,可在水中加入2000倍的阿司匹林,降低植物的蒸騰作用,有利於植株恢複正常生長。
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