大(da)力(li)興(xing)修(xiu)水(shui)利(li),修(xiu)建(jian)防(fang)洪(hong)工(gong)程(cheng),迅(xun)速(su)提(ti)高(gao)農(nong)田(tian)的(de)抗(kang)澇(lao)能(neng)力(li),這(zhe)是(shi)防(fang)止(zhi)澇(lao)害(hai)的(de)根(gen)本(ben)措(cuo)施(shi)。在(zai)汛(xun)期(qi),做(zuo)好(hao)一(yi)切(qie)防(fang)汛(xun)準(zhun)備(bei),及(ji)時(shi)加(jia)固(gu)和(he)加(jia)高(gao)圍(wei)堤(di),根(gen)據(ju)水(shui)情(qing)有(you)計(ji)劃(hua)地(di)進(jin)行(xing)分(fen)洪(hong)。內(nei)澇(lao)及(ji)時(shi)排(pai)除(chu)。
2、合理布局,避開洪澇
加(jia)強(qiang)調(tiao)查(zha)研(yan)究(jiu),摸(mo)清(qing)當(dang)地(di)洪(hong)澇(lao)發(fa)生(sheng)規(gui)律(lv),合(he)理(li)安(an)排(pai)耕(geng)作(zuo)製(zhi)度(du),以(yi)避(bi)開(kai)洪(hong)澇(lao)災(zai)害(hai),爭(zheng)取(qu)做(zuo)到(dao)有(you)災(zai)穩(wen)產(chan),無(wu)災(zai)豐(feng)收(shou)。如(ru)我(wo)省(sheng)沿(yan)江(jiang)地(di)區(qu)的(de)雙(shuang)季(ji)早(zao)稻(dao)易(yi)遭(zao)夏(xia)澇(lao),早(zao)稻(dao)種(zhong)植(zhi)以(yi)早(zao)熟(shu)品(pin)種(zhong)為(wei)宜(yi),爭(zheng)取(qu)在(zai)7月上、中zhong旬xun洪hong水shui來lai臨lin前qian成cheng熟shu收shou獲huo。沿yan淮huai地di區qu汛xun期qi發fa生sheng時shi多duo是shi中zhong稻dao苗miao期qi和he分fen蘖nie期qi,要yao注zhu意yi將jiang秧yang田tian安an排pai在zai不bu易yi被bei淹yan的de地di方fang異yi地di育yu秧yang,保bao證zheng秧yang苗miao不bu受shou損sun失shi。
3、選用耐澇性強的品種
據(ju)調(tiao)查(zha),不(bu)同(tong)品(pin)種(zhong)間(jian)耐(nai)澇(lao)性(xing)強(qiang)弱(ruo)也(ye)不(bu)同(tong)。要(yao)注(zhu)意(yi)選(xuan)用(yong)根(gen)係(xi)發(fa)達(da),莖(jing)稈(gan)強(qiang)韌(ren),株(zhu)型(xing)緊(jin)湊(cou)的(de)品(pin)種(zhong),這(zhe)類(lei)品(pin)種(zhong)耐(nai)澇(lao)性(xing)強(qiang),澇(lao)後(hou)恢(hui)複(fu)生(sheng)長(chang)快(kuai),再(zai)生(sheng)能(neng)力(li)強(qiang)。在(zai)相(xiang)同(tong)的(de)淹(yan)水(shui)條(tiao)件(jian)下(xia),粳(jing)稻(dao)損(sun)失(shi)最(zui)重(zhong),糯(nuo)稻(dao)次(ci)之(zhi),秈(xian)稻(dao)較(jiao)輕(qing)。
在選用耐澇品種的同時,還應根據當地洪澇可能出現的時期、程度,選用早、中、遲熟品種合理搭配,防止品種單一化而招致全麵損失。
4、加強栽培管理,增強抗性
水shui稻dao受shou澇lao後hou,在zai災zai前qian生sheng長chang是shi否fou健jian壯zhuang,對dui災zai後hou恢hui複fu生sheng機ji和he減jian少shao產chan量liang損sun失shi的de影ying響xiang很hen大da。故gu應ying在zai培pei育yu壯zhuang秧yang的de基ji礎chu上shang,促cu使shi秧yang苗miao早zao發fa和he健jian壯zhuang生sheng長chang,使shi植zhi株zhu本ben身shen積ji累lei較jiao多duo的de養yang分fen,可ke顯xian著zhu提ti高gao水shui稻dao的de耐nai澇lao能neng力li。
5、水稻受澇後的補救措施
澇後水稻受到不同程度的損害,必須先鑒定其是否受澇而死亡,未死的加強澇後補救管理以減輕損失。受澇後的補救措施主要有:
(1)盡jin早zao排pai水shui搶qiang救jiu。澇lao後hou應ying立li即ji組zu織zhi人ren力li,集ji中zhong一yi切qie排pai水shui設she備bei,進jin行xing排pai水shui搶qiang救jiu。先xian排pai高gao田tian,爭zheng取qu讓rang苗miao尖jian及ji早zao露lu出chu水shui麵mian,就jiu可ke減jian少shao受shou淹yan天tian數shu,減jian輕qing損sun失shi。但dan在zai排pai水shui時shi應ying注zhu意yi,在zai高gao溫wen烈lie日ri期qi間jian,不bu能neng一yi次ci性xing將jiang水shui排pai幹gan,必bi須xu保bao留liu適shi當dang水shui層ceng,使shi稻dao苗miao逐zhu漸jian恢hui複fu生sheng機ji,否fou則ze如ru一yi次ci性xing排pai幹gan,因yin稻dao田tian長chang期qi浸jin在zai水shui裏li,生sheng活huo力li弱ruo,莖jing葉ye柔rou軟ruan,遇yu晴qing天tian烈lie日ri容rong易yi枯ku萎wei,反fan而er加jia重zhong損sun失shi;danzaiyinyutian,kejiangshuiyicixingpaigan,youliyuyangmiaohuifushengchang。rudaomiaoshouyanhou,piyehenshao,zhizhushengchangshangjianzhuang,tianmianfunijiaoduo,yekepaigangetian,yifangfangendaofu。
(2)dalaopiaofuwu,ximiaofuli。shoulaoyangmiaozaituishuishi,yaosuituishuilaoqupiaofuwu,kejianshaodaomiaoyashanghemiaoyefulanxianxiang。tongshizaituishuigangluomiaojianshi,yaojinxingximiao,keyongzhuganlaihuizhendang,xiquzhanwujingyedenisha,duidaomiaohuifushengjixiaoguolianghao。yibanzaishuizhihunzhuo、泥沙多的地區,容易積沙壓傷秧苗,若秧苗處於分蘖期和幼穗分化前期,可隨退水方向潑水洗苗扶理,結合清除爛葉、黃葉,有較好的效果。
(3)查苗補缺。苗期受澇後要進行逐田塊檢查,如發現缺株,要立即補齊。補苗的方法:一yi是shi利li用yong原yuan來lai的de餘yu秧yang補bu栽zai。二er是shi分fen株zhu,就jiu是shi在zai未wei受shou澇lao或huo澇lao輕qing的de田tian裏li,選xuan取qu生sheng長chang良liang好hao,正zheng在zai分fen蘖nie的de稻dao株zhu,分fen出chu部bu分fen移yi栽zai到dao缺que苗miao的de田tian中zhong。三san是shi移yi苗miao補bu田tian,就jiu是shi如ru果guo缺que苗miao嚴yan重zhong,可ke將jiang幾ji塊kuai田tian裏li的de稻dao苗miao移yi到dao一yi塊kuai田tian裏li,空kong出chu的de田tian塊kuai可ke重zhong新xin育yu秧yang移yi栽zai或huo直zhi播bo晚wan稻dao,或huo改gai種zhong其qi它ta作zuo物wu。
(4)qinglutian,bushifeiliao。paishuihoudaomiaohuifushengji,jijinxingyiciqinglutian,yizengqiangturangtouqixinghegenxihuoli,qinglutianhoujieheguanqianshuibuzhuiyicisuxiaofeiliao。yibanchuyufennieqidemeimukezhuishiniaosu5.0公斤、氯化鉀5.0公斤,以促進幼穗分化,壯稈大穗。若處於孕穗期,則應在破口期3-5天,每畝補施尿素2.5公斤。抽穗後進行1-2cigenwaipenshilinjiafeidengyemianfei。houqijianchiqianshuishirunguangai,yibaochigenxihuoli,huoshudaolao,tigaojieshilvhelizhong,congermibuyinlaozaizaochengdeyouxiaosuibuzuhesuilishujianshaodesunshi。
(5)加jia強qiang病bing蟲chong防fang治zhi。水shui稻dao受shou澇lao後hou,由you於yu葉ye片pian損sun傷shang,增zeng加jia了le感gan病bing的de機ji會hui,特te別bie是shi白bai葉ye枯ku病bing,受shou澇lao後hou往wang往wang危wei害hai嚴yan重zhong,紋wen枯ku病bing也ye能neng重zhong度du發fa生sheng。為wei此ci,要yao及ji時shi用yong藥yao防fang治zhi,盡jin早zao封feng鎖suo白bai葉ye枯ku病bing的de發fa病bing中zhong心xin,藥yao劑ji可ke選xuan用yong葉ye青qing雙shuang、消菌靈等;紋枯病防治可選用井岡黴素、紋枯清等藥劑。
(6)及(ji)時(shi)搶(qiang)收(shou)。對(dui)已(yi)經(jing)黃(huang)熟(shu)甚(shen)至(zhi)乳(ru)熟(shu)末(mo)期(qi)的(de)水(shui)稻(dao),應(ying)在(zai)洪(hong)水(shui)來(lai)臨(lin)之(zhi)前(qian)及(ji)時(shi)搶(qiang)收(shou)。萬(wan)一(yi)收(shou)割(ge)不(bu)及(ji),也(ye)要(yao)在(zai)水(shui)退(tui)後(hou)立(li)即(ji)搶(qiang)收(shou),防(fang)止(zhi)穀(gu)粒(li)黴(mei)爛(lan)和(he)發(fa)芽(ya)造(zao)成(cheng)的(de)損(sun)失(shi)。
(7)蓄留再生稻。對幼穗分化期至孕穗期,甚至是抽穗開花期長期受淹的水稻,退水後穗部已毀,但根、莖仍活的稻苗,及時割去地上已壞死部分,蓄留洪水再生稻,利用澇災後頭季稻剩下相當多的時間和溫光雨資源,獲得較理想的產量。
(8)及時補種“早翻晚”。凡在7月20~25日前能退水的田塊,沿江、江南雙季稻區,可選用早稻早熟或特早熟品種,實行翻秋種植。可采取免耕直播,加強肥水管理和化學除草,一般可獲得畝產250~300公斤的收成。
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