zaodaozhengchuyuchousuiqianhou，daotianyijingjieshuleshaitianjieduan，yaoqiuturangshuifenshirunbianyukaihuaguanjiang，jimanzushuidaojieshiduishuifendexuyao，youshiturangtouqilianghao，baozhenggenxihuoli

，cainenggaoxiaoxishouliyongturangyangfen。xiazhishijiedeshifei，zaihuaiheyinanzhengshizaodaochousuiyanghuashiqi，zaodaodejieshiqicongchousuizhichengshuxuyao30～40天(tian)，完(wan)成(cheng)開(kai)花(hua)授(shou)精(jing)和(he)灌(guan)漿(jiang)結(jie)實(shi)過(guo)程(cheng)。這(zhe)階(jie)段(duan)的(de)營(ying)養(yang)供(gong)應(ying)狀(zhuang)況(kuang)直(zhi)接(jie)影(ying)響(xiang)早(zao)稻(dao)的(de)穗(sui)粒(li)數(shu)和(he)粒(li)重(zhong)
，是(shi)最(zui)後(hou)決(jue)定(ding)產(chan)量(liang)形(xing)成(cheng)的(de)關(guan)鍵(jian)時(shi)期(qi)。水(shui)稻(dao)的(de)粒(li)重(zhong)由(you)“穀粒大小”和“充實度”兩liang部bu分fen構gou成cheng

，充chong實shi度du決jue定ding於yu這zhe期qi間jian灌guan漿jiang物wu質zhi的de合he成cheng與yu運yun輸shu狀zhuang況kuang，加jia強qiang後hou期qi營ying養yang管guan理li，是shi促cu進jin早zao稻dao粒li大da粒li飽bao防fang止zhi空kong殼ke秕bi粒li的de關guan鍵jian時shi候hou。水shui稻dao的de灌guan漿jiang是shi光guang合he產chan物wu由you莖jing葉ye向xiang籽zi粒li的de不bu斷duan運yun輸shu
，在zai開kai花hua後hou的de15～20天出現灌漿高峰；而在花後的25～45天
，稻穀籽粒的幹重就達到最大值，宣告成熟。

tongchangzaodaopinzhongdeshengyuqitedianwei



，yingyangshengchangyushengzhishengchanghuichuxianbufenshiduandezhongdie，biaoxianweisuideshengchangxianyubajie，yousuifenhuazao
，danchunyingyangshengchangqiduan，shengzhishengchangqikaishizaoqiejiaochang。chuantongdeshifeimoshiyiqiancuweizhu，zhizhongshijiniefei，shishishang，houqidaozhuyingyangzhuangkuangdezhongyao
，zaiyubuchuxianzaoshuai，baochigetijianzhuangcaiweizhengqulishuhelizhongtigongkenengheyouliyugaochan。shuidaoyepianshiguanghezuoyongdezhuyaoqiguan，houqidaozhubutongbuweiyepiandeguanghezuoyongyishangweizhankaiyedenenglizuiqiang。chousuihoudingbudi2～3葉ye片pian是shi以yi供gong應ying籽zi粒li為wei主zhu。這zhe時shi施shi肥fei可ke使shi稻dao株zhu上shang部bu功gong能neng葉ye維wei持chi較jiao高gao的de營ying養yang水shui平ping，確que保bao其qi保bao持chi較jiao強qiang的de光guang合he能neng力li，也ye促cu使shi遲chi開kai的de弱ruo勢shi花hua得de到dao充chong足zu營ying養yang，防fang止zhi早zao衰shuai，延yan長chang灌guan漿jiang，提ti高gao結jie實shi率lv和he千qian粒li重zhong。

cishizhuifeizhuyaoyaokaolvzaodaoduidanjiayangfenxuqiudetedian。yuwandaoxiangbi
，zaodaosuoxudedanjiaoshaoerxuyaodejiajiaoduo。suoyi，zhuifeiyaocaiyongdanjiafeipeiheshiyong，houqibujiahenzhongyao。jianyi：早稻鉀肥的分配比例以基肥和追肥各一半為佳
；此次氮肥的分配比例酌情三分之一或四分之一，折合純氮4公斤/畝以內。

總zong之zhi

，要yao注zhu意yi看kan苗miao施shi肥fei。對dui於yu那na些xie拔ba節jie期qi已yi出chu現xian了le葉ye色se褪tui綠lv的de早zao稻dao田tian，後hou期qi適shi量liang追zhui施shi氮dan肥fei可ke以yi提ti高gao結jie實shi率lv
，促cu進jin粒li大da粒li飽bao
，有you利li於yu產chan量liang提ti高gao；但是追肥的時期、用量要恰當。如果過晚過多，會導致貪青晚熟或稻瘟病加重