黃瓜瓜打頂屬於生理性病害,引起這種現象的原因有:傷根,低溫寡照,肥害、藥(yao)害(hai),土(tu)壤(rang)幹(gan)旱(han),肥(fei)料(liao)供(gong)應(ying)不(bu)足(zu)等(deng)。冬(dong)茬(cha)黃(huang)瓜(gua),在(zai)管(guan)理(li)精(jing)細(xi)的(de)情(qing)況(kuang)下(xia),主(zhu)要(yao)原(yuan)因(yin)就(jiu)是(shi)溫(wen)度(du)低(di)和(he)連(lian)陰(yin)天(tian)所(suo)致(zhi),尤(you)其(qi)是(shi)多(duo)年(nian)的(de)老(lao)棚(peng),保(bao)溫(wen)性(xing)差(cha),深(shen)冬(dong)季(ji)節(jie)溫(wen)度(du)低(di)(連續多天棚溫最低降至10℃以下),daozhihuangguagenxifayubuliang,yejianwenduguodi,genxixiangxinshengbuweiyunsongdeyingyangjiaoshao,zhizhuyingyangshengchangshoudaoyizhi,daozhiyingyangshengchangjianruo,congerchuxianyingyangzhangaixingguadading。
瓜打頂對黃瓜產量的影響很大,如不及時采取措施,會造成很大損失,具體操作如下:
1、zhaichudingguadinghua。shouxianbasuoyouhuangguadingbudehuajiyouguazhaichu,ranhouyemianpenshiyuntaisuneizhi,huifulongtoushengchang。zhuyizhengzhuliuguashi,yaogenjuhuangguadechangshiqingkuangtiaojieliuguashuliang,wendujiaodi,zhizhushengchanghuanman,liuyizhiguajike,yifangliuguaguoduozhuike。
2、補(bu)水(shui)衝(chong)肥(fei)。為(wei)防(fang)止(zhi)棚(peng)內(nei)適(shi)度(du)過(guo)大(da),澆(jiao)水(shui)時(shi)要(yao)采(cai)取(qu)小(xiao)水(shui)勤(qin)澆(jiao)的(de)方(fang)式(shi),當(dang)肥(fei)水(shui)到(dao)南(nan)頭(tou)時(shi)立(li)即(ji)改(gai)換(huan)下(xia)一(yi)行(xing),嚴(yan)防(fang)大(da)水(shui)漫(man)灌(guan)。每(mei)次(ci)澆(jiao)水(shui)時(shi)要(yao)配(pei)合(he)衝(chong)施(shi)生(sheng)根(gen)養(yang)根(gen)類(lei)的(de)肥(fei)料(liao),以(yi)促(cu)進(jin)根(gen)係(xi)發(fa)育(yu)和(he)植(zhi)株(zhu)複(fu)壯(zhuang)。
3、提高溫度。澆水衝肥後,要按照先提溫後排濕的原則進行,一般當棚內溫度達到32℃以上才放風,等溫度降至25℃時shi再zai閉bi棚peng升sheng溫wen,循xun環huan進jin行xing。另ling外wai可ke配pei合he張zhang掛gua反fan光guang膜mo,增zeng加jia草cao簾lian厚hou度du,及ji時shi清qing理li棚peng膜mo等deng措cuo施shi保bao證zheng白bai天tian溫wen度du,提ti高gao夜ye間jian溫wen度du,使shi黃huang瓜gua盡jin快kuai恢hui複fu生sheng長chang。
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