早稻育秧期,常常會遇到低溫霜凍、長(chang)期(qi)陰(yin)雨(yu)及(ji)大(da)風(feng)雷(lei)雨(yu)等(deng)災(zai)害(hai)性(xing)天(tian)氣(qi),對(dui)育(yu)足(zu)育(yu)好(hao)早(zao)稻(dao)壯(zhuang)秧(yang)不(bu)利(li),為(wei)此(ci),建(jian)議(yi)各(ge)地(di)農(nong)戶(hu)要(yao)立(li)足(zu)抗(kang)災(zai),密(mi)切(qie)注(zhu)意(yi)天(tian)氣(qi)變(bian)化(hua)情(qing)況(kuang),隨(sui)時(shi)采(cai)取(qu)相(xiang)應(ying)的(de)防(fang)禦(yu)措(cuo)施(shi),減(jian)輕(qing)災(zai)害(hai)性(xing)天(tian)氣(qi)對(dui)早(zao)稻(dao)秧(yang)苗(miao)的(de)為(wei)害(hai)。具(ju)體(ti)措(cuo)施(shi)如(ru)下(xia):?
一、低di溫wen霜shuang凍dong。早zao稻dao育yu秧yang期qi間jian如ru遇yu較jiao強qiang冷leng空kong氣qi侵qin襲xi,就jiu有you可ke能neng出chu現xian低di溫wen霜shuang凍dong,極ji易yi造zao成cheng秧yang苗miao凍dong害hai,甚shen至zhi死si苗miao。對dui低di溫wen霜shuang凍dong的de預yu防fang,可ke在zai冷leng空kong氣qi來lai臨lin前qian夕xi,采cai取qu灌guan深shen水shui保bao溫wen的de措cuo施shi,即ji灌guan水shui至zhi秧yang苗miao芯xin葉ye,待dai氣qi溫wen回hui升sheng後hou再zai落luo幹gan,恢hui複fu正zheng常chang管guan理li。如ru果guo低di溫wen時shi間jian較jiao長chang,在zai中zhong午wu氣qi溫wen相xiang對dui較jiao高gao時shi可ke適shi應ying排pai水shui通tong氣qi,然ran後hou再zai換huan成cheng新xin鮮xian水shui進jin行xing保bao溫wen。?
二、長(chang)期(qi)陰(yin)雨(yu)。早(zao)稻(dao)育(yu)秧(yang)期(qi)間(jian)往(wang)往(wang)雨(yu)水(shui)較(jiao)多(duo),光(guang)照(zhao)偏(pian)少(shao),氣(qi)溫(wen)也(ye)較(jiao)低(di),有(you)時(shi)甚(shen)至(zhi)會(hui)出(chu)現(xian)長(chang)時(shi)間(jian)的(de)低(di)溫(wen)陰(yin)雨(yu),容(rong)易(yi)造(zao)成(cheng)早(zao)稻(dao)秧(yang)苗(miao)黃(huang)枯(ku),出(chu)現(xian)大(da)麵(mian)積(ji)的(de)料(liao)秧(yang)死(si)苗(miao)。遇(yu)到(dao)這(zhe)種(zhong)天(tian)氣(qi),應(ying)增(zeng)施(shi)一(yi)些(xie)灰(hui)雜(za)肥(fei)作(zuo)秧(yang)田(tian)覆(fu)蓋(gai)物(wu),盡(jin)量(liang)少(shao)灌(guan)水(shui)上(shang)秧(yang)板(ban)。但(dan)在(zai)久(jiu)雨(yu)天(tian)氣(qi)突(tu)然(ran)暴(bao)晴(qing)時(shi),則(ze)應(ying)適(shi)當(dang)灌(guan)深(shen)水(shui)護(hu)苗(miao),防(fang)止(zhi)秧(yang)苗(miao)出(chu)現(xian)生(sheng)理(li)失(shi)水(shui)而(er)造(zao)成(cheng)青(qing)枯(ku)死(si)苗(miao)。?
三、大(da)風(feng)雷(lei)雨(yu)。春(chun)季(ji)天(tian)氣(qi)多(duo)變(bian),出(chu)現(xian)短(duan)時(shi)間(jian)的(de)大(da)風(feng)雷(lei)雨(yu)天(tian)氣(qi)也(ye)往(wang)往(wang)較(jiao)多(duo),可(ke)造(zao)成(cheng)秧(yang)苗(miao)搭(da)葉(ye)翻(fan)根(gen),影(ying)響(xiang)成(cheng)秧(yang)率(lv)。因(yin)此(ci),在(zai)出(chu)現(xian)大(da)風(feng)雷(lei)雨(yu)時(shi),要(yao)立(li)即(ji)灌(guan)滿(man)水(shui)將(jiang)秧(yang)苗(miao)全(quan)部(bu)淹(yan)沒(mei),待(dai)大(da)風(feng)雷(lei)雨(yu)過(guo)後(hou)再(zai)排(pai)水(shui)落(luo)幹(gan),並(bing)及(ji)時(shi)做(zuo)好(hao)秧(yang)苗(miao)的(de)護(hu)理(li)工(gong)作(zuo),以(yi)早(zao)恢(hui)複(fu)正(zheng)常(chang)生(sheng)長(chang)。
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