xiaomaizaifengdongqianfashengwangchanghuizaochengzhizhudeyangfenjileijianshao,shengyuqitizao,kanghannenglijiangdi,yifashengdonghai,donghaiyanzhongshiyoumiaosiwang,daozhichanliangdafuxiajiang,shenzhijuechan。由於今年我國黃淮地區,小麥播種期間墒情較好,小麥出苗後氣溫偏高(今年10月份,不少地方的氣溫比常年偏高1℃~3℃),雖然“立冬”已yi到dao,但dan小xiao麥mai仍reng繼ji續xu生sheng長chang,致zhi使shi部bu分fen早zao播bo麥mai田tian發fa生sheng了le旺wang長chang現xian象xiang。因yin此ci,搞gao好hao控kong治zhi小xiao麥mai旺wang長chang工gong作zuo,就jiu顯xian得de尤you為wei重zhong要yao。控kong製zhi麥mai苗miao旺wang長chang,可ke綜zong合he運yun用yong以yi下xia方fang法fa:
一、適時鎮壓 鎮壓宜在上凍前進行,鎮壓有“控上促下”dezuoyong。zhenyajiketashiturang,mibuliefeng,fangzhitoufengpaoshang,diaogensimiao,younengyouxiaoyizhizhujinghefennietuchang,cujingenxixiazha,shimaimiaozhuangerbuwang。changyongdezhenyafangfashirengongtaya。zhenyayizaiqingtiandexiawujinxing,shuangdongweihua、露水未幹時不要進行鎮壓,以免損傷麥苗。鎮壓次數不要過多,一般1~2次便可。鎮壓過重,易損傷麥苗,引起減產。
二、深中耕斷根 肥水充足的麥田,當麥苗長到5~6片葉,葉片呈肥大垂披狀時,即是旺長。應及時運用行間深中耕斷根的辦法,來控製旺長。行間中耕由淺入深,深度5~7厘米為宜。通過深中耕可切斷一部分次生根,從而有效控製根係對水肥的吸收,減少無效分蘖,促進麥苗健壯生長,起到“先抑後促”的作用。而且,中耕還有消滅雜草,保墒防旱等效果。
三、科學施肥澆水 duibutongleixingdewangchangmaitian,jinxingkexueshifeijiaoshui。duiyufeilijiaozudewangchangmaitian,zhiyaoturangbuganhan,dongqianbuyaozhuifeijiaoshui,yiliyukongzhimaimiaowangchang。danduiyudilijiaocha、jifeibuzu,yinbozhongguozaozaochengdewangchangmaitian,wangwangyinmaimiaowangchangerxiaohaoguoduodeyangfen,daozhizhizhutineiyingyangchucunbuzu,shikanghanlixiajiang,zheleiwangchangmaitianyingzai“小雪”前後適量追肥、澆水一次,以利於麥苗安全越冬。
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