一是看苗情施肥。在追肥過程中要根據不同的苗情分類追施。一般來說,晚播苗、弱苗應重施肥,提高分蘖成穗率;壯苗則少施或不施返青肥。同時,對於冬季沒有形成壯苗或單株分蘖少,每畝總莖蘖數在40萬以下的麥田要早施、重施,一般每畝追施三元素硫基複合肥20gongjin。duiyuyuedongqigetifayulianghao,quntishizhongdezhuangmiaozeshaoshihuobushi,zhuyaokongzhibajiefeiyijianshaochunjiwuxiaofenniedezisheng,fangzhixinglongyubi,youliyutongfengtouguang。duiquntiguodadewangchangmiao,chuzaifanqingqikongzhifeishuiwai,haiyaocaiqushengeng、化學調控等措施,控製小麥根、莖、葉的生長。
二是看土施肥,沙土地由於“發小苗不發老苗”。baofeibaoshuilicha,yingshidangduoshifei,ruguoshifeibuzu,duisuishuhelishudeduoshaoyijihouqideshengchangdouhuiyouyidingdeyingxiang。niantudiyouyuqianqifeixiaofahuijiaocha,fanqingqiyingshaoshi,yunsuiqikecaiqugenwaishifei,yingzhuyishifeibuyaoguoduo,yifangtanqinghedaofu。
三是看天施肥,如果返青期遇下雨天,用化肥施播器將化肥施入,嚴禁撒施化肥,避免造成燒苗、燒(shao)葉(ye),影(ying)響(xiang)小(xiao)麥(mai)生(sheng)長(chang)。撒(sa)施(shi)化(hua)肥(fei)不(bu)僅(jin)小(xiao)麥(mai)不(bu)能(neng)很(hen)好(hao)地(di)吸(xi)收(shou),還(hai)會(hui)造(zao)成(cheng)肥(fei)料(liao)揮(hui)發(fa)與(yu)流(liu)失(shi),導(dao)致(zhi)不(bu)必(bi)要(yao)的(de)浪(lang)費(fei)。天(tian)旱(han)時(shi)施(shi)肥(fei)後(hou)要(yao)及(ji)時(shi)灌(guan)水(shui),以(yi)提(ti)高(gao)化(hua)肥(fei)的(de)利(li)用(yong)率(lv)。
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