最(zui)近(jin),農(nong)業(ye)部(bu)種(zhong)植(zhi)業(ye)管(guan)理(li)司(si)在(zai)湖(hu)北(bei)潛(qian)江(jiang)組(zu)織(zhi)召(zhao)開(kai)了(le)全(quan)國(guo)水(shui)稻(dao)生(sheng)產(chan)專(zhuan)家(jia)座(zuo)談(tan)會(hui),分(fen)析(xi)了(le)當(dang)前(qian)水(shui)稻(dao)生(sheng)產(chan)形(xing)勢(shi),進(jin)一(yi)步(bu)研(yan)究(jiu)促(cu)進(jin)水(shui)稻(dao)生(sheng)產(chan)最(zui)直(zhi)接(jie)、最(zui)有(you)力(li)的(de)措(cuo)施(shi),提(ti)出(chu)了(le)近(jin)期(qi)工(gong)作(zuo)意(yi)見(jian)。與(yu)會(hui)專(zhuan)家(jia)一(yi)致(zhi)認(ren)為(wei),在(zai)水(shui)稻(dao)生(sheng)產(chan)的(de)關(guan)鍵(jian)時(shi)節(jie),農(nong)業(ye)部(bu)召(zhao)開(kai)這(zhe)次(ci)會(hui)議(yi),非(fei)常(chang)及(ji)時(shi),十(shi)分(fen)必(bi)要(yao),建(jian)議(yi)各(ge)地(di)農(nong)業(ye)部(bu)門(men)針(zhen)對(dui)當(dang)地(di)早(zao)稻(dao)苗(miao)情(qing)長(chang)勢(shi),分(fen)類(lei)指(zhi)導(dao),切(qie)實(shi)加(jia)強(qiang)早(zao)稻(dao)中(zhong)後(hou)期(qi)田(tian)間(jian)管(guan)理(li),促(cu)進(jin)早(zao)稻(dao)豐(feng)收(shou)。具(ju)體(ti)田(tian)間(jian)管(guan)理(li)技(ji)術(shu)指(zhi)導(dao)意(yi)見(jian)如(ru)下(xia):
一、因苗施好保花保蘖肥和粒肥。目前雙季早稻已進入幼穗分化中期,即倒2葉期,是施用保花肥和保蘖肥的最好時期。倒二期施肥,能有效防止穎花退化,延長倒一、倒dao二er葉ye的de長chang度du,促cu進jin分fen蘖nie成cheng穗sui。生sheng產chan上shang應ying根gen據ju田tian間jian禾he苗miao長chang勢shi長chang相xiang,施shi用yong好hao氮dan肥fei和he鉀jia肥fei,達da到dao增zeng加jia有you效xiao穗sui數shu和he每mei穗sui粒li數shu的de目mu的de。一yi般ban每mei畝mu施shi用yong尿niao素su3-5公斤,鉀肥3-5公斤。另外,如果抽穗期葉片顏色淡綠,還應看苗補施粒肥,一般每畝施用尿素0-2公斤,或者施用葉麵肥,以增強後期光合能力和促進灌漿結實。但是,穗肥和粒肥的具體肥料用量應根據田間禾苗生長情況確定。
二、分類管好水分。做到中期有水長穗和後期幹濕壯籽。對於部分尚未曬田的遲發田,要注意控水控苗,防止惜水惜苗,造成群體過大;duiyuyishaitianjieshudedaotian,fushuihoucaiyongganshijianxieguangai,youliyushuidaogenxishengchanghebingchonghaidekongzhi,tongshiyefuhejieshuiguangaideyaoqiu。shengchanzhongyingzaichousuiyiqianhechousuiyihoucaiyongganganshishijianxieguangai,danzaichousuiqijiancaiyongqianshuiguangai,zuodaoyoushuichousui,yiyouliyuchousuizhengqihechengshuyizhi。
三、綜合防治病蟲害。預計今年水稻二化螟、稻飛虱等病蟲害屬於中等偏重年份,主要是由於去年暖冬天氣和入春後持續高溫天氣,導致水稻二化螟等害蟲越冬基數大、病蟲害發生危害早。植保部門應增加病蟲調查次數,及時掌握病蟲害發生的情況,利用電視和廣播等媒體通報當地病蟲情報、施藥時間、藥(yao)劑(ji)選(xuan)擇(ze)及(ji)用(yong)量(liang),在(zai)早(zao)稻(dao)破(po)口(kou)期(qi)普(pu)遍(bian)進(jin)行(xing)一(yi)次(ci)重(zhong)點(dian)防(fang)治(zhi),有(you)效(xiao)控(kong)製(zhi)當(dang)地(di)主(zhu)要(yao)病(bing)蟲(chong)害(hai)的(de)發(fa)生(sheng),確(que)保(bao)水(shui)稻(dao)中(zhong)後(hou)期(qi)田(tian)間(jian)無(wu)重(zhong)大(da)病(bing)蟲(chong)害(hai)發(fa)生(sheng)。同(tong)時(shi),有(you)條(tiao)件(jian)的(de)村(cun)組(zu)應(ying)進(jin)行(xing)集(ji)中(zhong)連(lian)片(pian)的(de)統(tong)防(fang)統(tong)治(zhi),以(yi)提(ti)高(gao)防(fang)治(zhi)效(xiao)果(guo)和(he)減(jian)少(shao)農(nong)藥(yao)用(yong)量(liang)。
四、適時收獲。早稻收獲偏早或偏遲,均影響早稻產量和品質形成,俗語“八成熟,七成收;九成熟,十成收”指的就是早稻的適時收獲。特別是南方早稻收獲期間往往伴隨著連續高溫、暴(bao)雨(yu)等(deng)惡(e)劣(lie)天(tian)氣(qi),易(yi)出(chu)現(xian)穗(sui)發(fa)芽(ya)而(er)造(zao)成(cheng)減(jian)產(chan)和(he)品(pin)質(zhi)下(xia)降(jiang)。因(yin)此(ci),各(ge)地(di)應(ying)積(ji)極(ji)組(zu)織(zhi)收(shou)獲(huo),有(you)條(tiao)件(jian)的(de)地(di)方(fang)應(ying)大(da)力(li)推(tui)進(jin)機(ji)收(shou),提(ti)高(gao)收(shou)獲(huo)效(xiao)率(lv),促(cu)進(jin)早(zao)稻(dao)顆(ke)粒(li)歸(gui)倉(cang),同(tong)時(shi)為(wei)晚(wan)稻(dao)生(sheng)產(chan)預(yu)留(liu)更(geng)大(da)空(kong)間(jian)。收(shou)獲(huo)期(qi)的(de)確(que)定(ding),一(yi)般(ban)為(wei)齊(qi)穗(sui)後(hou)25天左右,全穗失去綠色,穎殼90%基本變黃。
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