根據天氣變化,及時調整管理方式
夏季蔬菜定植後,不少菜農為促進緩苗、fangzhiturangganhan,wangwanglianxujiaoshui,yigeyueshenzhinengjiaoqibacishui,erqieduocaiqudashuimanguandefangshi。qinglangtianqijiaodashui,turangshuifenzhengfakuai,jiaoshuikejiangdidiwen,zheyangcaozuohaimianqiangshuodeguoqu。danyidanzaoyulianyintian,turangguoshi,touqitoushuixingcha,jiurongyifashengougen,yinfagenbubinghai。yinci,cainongpengyouyaogenjutianqibianhua,jishitiaozhengguanlifangshi。
定植後5~7天應澆緩苗水,若此時遭遇連續陰雨天,建議延遲澆水或澆小水。澆水宜在早晨5~6時(shi)進(jin)行(xing),此(ci)時(shi)水(shui)溫(wen)與(yu)地(di)溫(wen)的(de)差(cha)距(ju)最(zui)小(xiao),對(dui)根(gen)係(xi)影(ying)響(xiang)小(xiao)。大(da)雨(yu)來(lai)臨(lin)前(qian)關(guan)閉(bi)通(tong)風(feng)口(kou),防(fang)止(zhi)雨(yu)水(shui)灌(guan)入(ru)棚(peng)內(nei),雨(yu)後(hou)一(yi)定(ding)要(yao)及(ji)時(shi)通(tong)風(feng),降(jiang)低(di)棚(peng)內(nei)溫(wen)度(du)、濕度,同時注意劃鋤鬆土,增加土壤透氣性。
全麵施用生物菌肥,增強植株抗性
從苗期蘸根、穴(xue)施(shi)到(dao)後(hou)期(qi)衝(chong)施(shi),生(sheng)物(wu)菌(jun)劑(ji)都(dou)是(shi)不(bu)可(ke)缺(que)少(shao)的(de),尤(you)其(qi)是(shi)苗(miao)期(qi),連(lian)續(xu)施(shi)用(yong)是(shi)極(ji)為(wei)有(you)利(li)的(de)。菌(jun)肥(fei)最(zui)好(hao)用(yong)同(tong)一(yi)種(zhong)菌(jun)種(zhong),避(bi)免(mian)不(bu)同(tong)菌(jun)種(zhong)之(zhi)間(jian)產(chan)生(sheng)拮(jie)抗(kang)作(zuo)用(yong),影(ying)響(xiang)菌(jun)肥(fei)的(de)施(shi)用(yong)效(xiao)果(guo)。很(hen)多(duo)菜(cai)農(nong)將(jiang)菌(jun)肥(fei)隨(sui)土(tu)壤(rang)深(shen)翻(fan)施(shi)到(dao)地(di)裏(li),這(zhe)種(zhong)做(zuo)法(fa)很(hen)好(hao),但(dan)對(dui)於(yu)蔬(shu)菜(cai)的(de)根(gen)係(xi)來(lai)說(shuo),集(ji)中(zhong)施(shi)用(yong)效(xiao)果(guo)更(geng)理(li)想(xiang)。菜(cai)農(nong)可(ke)將(jiang)菌(jun)肥(fei)分(fen)成(cheng)兩(liang)份(fen),一(yi)部(bu)分(fen)翻(fan)到(dao)地(di)裏(li),另(ling)一(yi)部(bu)分(fen)進(jin)行(xing)穴(xue)施(shi),為(wei)根(gen)係(xi)生(sheng)長(chang)創(chuang)造(zao)適(shi)宜(yi)的(de)環(huan)境(jing)條(tiao)件(jian)。
預防苗期病害、藥害,確保健壯長勢
幼苗時植株長勢較弱,病害易發生,如猝倒病、立枯病及近幾年高發的病毒病等,應注意防治。防治猝倒病、立枯病可用惡黴靈、甲基立枯磷等;防治病毒病可用寧南黴素、鹽酸嗎啉胍等;防治細菌性病害建議以農用鏈黴素、中生菌素為主,銅製劑用量減半。
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