開春後冬小麥就要進入一段快速生長的時期，從返青至開花期間
，貫穿著營養生長和生殖生長同時並進的特點
，為了達到增穗、zhuangganhesuidasuiqidemude，chunjizhuifeishihenzhongyaodecuoshi。dongxiaomaidechunjizhuifeishijiehejiaoshuijinxingde，yibanyaoxuanyongshuirongsuxiaoxinghuafei。congchangjianfeiliaonongyehuaxuexingzhuangkan，linfeihejiafeinonghuaxingzhuangdouwending，shiyizuojifeiyuzhongfei
，zaixiaomaibozhongqianquanbushiruturang，erdanfeixixinghuopo，henbuwending，wulunshizaidibiaohuoturangzhong
，zhiyaoshuliangshaoda，dourongyizaochengsunshihelangfei。suoyidanfeibushiheyicixingzuojifeizaiboqianquanbushiru，xuyaoanbilifencishiyong，jifeizuiduoshiyiban，yuxiadeyaozuochunjizhuifeishiyong，zheyangcainengtigaodanfeiliyonglvheshixianxiaomaigaochanyougaoxiaodemubiao。yinci，dongxiaomaidechunjizhuifeizhuyaoshizhizhuishidanfei
，chunjiyibanwuxuzaizhuishifuhe（混）肥了，除非有些農戶年前基肥隻用了磷酸二銨和尿素
，沒有施用含鉀的複混肥，或者一些預期目標產量高而土壤質地輕、肥力不高的麥田，可以再適當追施鉀肥（例如，5公斤氯化鉀/畝）。

　　為(wei)了(le)實(shi)現(xian)小(xiao)麥(mai)春(chun)季(ji)追(zhui)肥(fei)的(de)綜(zong)合(he)效(xiao)果(guo)，不(bu)僅(jin)所(suo)用(yong)氮(dan)肥(fei)品(pin)種(zhong)必(bi)須(xu)滿(man)足(zu)水(shui)溶(rong)性(xing)強(qiang)和(he)見(jian)效(xiao)快(kuai)的(de)要(yao)求(qiu)，同(tong)時(shi)要(yao)嚴(yan)格(ge)把(ba)握(wo)配(pei)套(tao)施(shi)肥(fei)技(ji)術(shu)，著(zhe)力(li)避(bi)免(mian)氮(dan)素(su)揮(hui)發(fa)與(yu)淋(lin)洗(xi)損(sun)失(shi)。

　　目前市場上供應的氮肥品種有尿素
、碳銨
、氯化銨、硫酸銨
、硝xiao酸suan銨an和he銨an脲niao等deng。它ta們men的de都dou是shi水shui溶rong性xing速su效xiao氮dan肥fei，適shi宜yi作zuo小xiao麥mai追zhui肥fei施shi用yong，肥fei效xiao也ye都dou比bi較jiao快kuai。但dan是shi從cong供gong應ying數shu量liang看kan，尿niao素su最zui多duo
，其qi次ci是shi碳tan銨an
，二er者zhe是shi我wo國guo目mu前qian糧liang食shi生sheng產chan中zhong施shi用yong最zui多duo的de當dang家jia氮dan肥fei品pin種zhong，尿niao素su和he碳tan銨an的de農nong化hua性xing狀zhuang很hen不bu相xiang同tong，雖sui然ran總zong的de趨qu勢shi是shi施shi用yong尿niao素su成cheng為wei主zhu流liu，但dan是shi各ge地di的de農nong戶hu有you不bu同tong的de評ping價jia和he選xuan擇ze。例li如ru河he北bei省sheng邯han鄲dan地di區qu曲qu周zhou縣xian的de一yi些xie農nong戶hu對dui碳tan銨an的de反fan應ying好hao
，他ta們men認ren為wei碳tan銨an肥fei效xiao快kuai，發fa苗miao早zao，價jia格ge便bian宜yi。可ke就jiu是shi市shi麵mian上shang碳tan銨an越yue來lai越yue少shao了le，不bu得de不bu改gai用yong尿niao素su。而er更geng多duo地di區qu糧liang農nong們men已yi習xi慣guan用yong尿niao素su作zuo追zhui肥fei。

　　尿素
、碳銨
、氯化銨
、硫酸銨和銨脲等作為追肥施用，在施肥方法上都需要將氮肥施入5limiyixia，bingfutujiaoshui，yifangzhiantaidanfeideqitaisunshi，qiebukejiangniaosuhetanansayudibiaohoudenglaotianxiayuhuoyongdashuichongshidibiaodefangfa，yinweizheyangbiaomiankanfeiliaokelihuajiele，danshijishangfeiliaozhuanhuachenganqipaodiaole。suobutongdeshiniaosuzuozhuifeishi，shiyongshijianyaoshidangtiqianjitian。yinweiniaosudeshijifeixiaoyaomanyuliuan

、碳銨和氯化銨等。至於提前幾天要看當時土壤溫度，10℃時7～8天，20℃時4～5天即可。