據ju筆bi者zhe春chun節jie前qian後hou在zai眾zhong多duo的de棉mian區qu調tiao查zha,今jin年nian的de棉mian田tian麵mian積ji呈cheng現xian恢hui複fu性xing增zeng長chang的de趨qu勢shi。盡jin管guan今jin春chun氣qi溫wen回hui升sheng較jiao慢man,棉mian田tian備bei耕geng比bi較jiao滯zhi緩huan,但dan棉mian花hua播bo種zhong育yu苗miao季ji節jie已yi經jing臨lin近jin,為wei了le使shi棉mian花hua能neng夠gou安an全quan播bo種zhong、安全育苗、安全移栽,在棉花播種移栽的過程中,必須做到安全施好肥、安全用好肥。
回顧近幾年棉花播種育苗移栽的情況,在施肥的問題上,還存在一些不安全的因素:一是有的農戶在苗床上過量施用肥料,由於土壤肥料溶液濃度過大,使棉苗生育受到抑製,有的苗子出得很好,可很快發生“燒苗”simiao。ershishiyongweichongfenfushudeyoujifeiliao,zacaodezhongzisuizhidaoru,miaochuangshangzacaobimianmiaochangdehaikuai,xingchengcaohuangmiao。sanshiyoudexuanyongniaosuzuomiaochuangdifei,niaosuzhonghanyoushaoliangdesuoerniao,duizhongzifayayoubuliangyingxiang,zhongzishoudaoduhaiyilanzhongwumiao,huozhinengmengfajishaodeshoushangmianmiao。sishizhuifeixuanyongchongshifei,weianjiliangyongfei,yeyifashengzhuoshangmianmiaodexianxiang。wushimianmiaoyizaizhiqian,zaimianhuadatiandifeiyongliangguoda、過(guo)淺(qian),特(te)別(bie)是(shi)高(gao)含(han)量(liang)的(de)複(fu)合(he)肥(fei),一(yi)次(ci)用(yong)量(liang)過(guo)大(da)後(hou),棉(mian)花(hua)苗(miao)子(zi)栽(zai)後(hou)僵(jiang)而(er)不(bu)發(fa)。六(liu)是(shi)有(you)的(de)茁(zhuo)壯(zhuang)棉(mian)苗(miao),栽(zai)後(hou)一(yi)次(ci)追(zhui)施(shi)尿(niao)素(su)超(chao)過(guo)常(chang)用(yong)施(shi)肥(fei)量(liang),棉(mian)花(hua)幼(you)莖(jing)由(you)紅(hong)變(bian)黑(hei),真(zhen)葉(ye)深(shen)綠(lv)濃(nong)縮(suo),子(zi)葉(ye)枯(ku)萎(wei),嚴(yan)重(zhong)的(de)整(zheng)株(zhu)枯(ku)死(si)。上(shang)述(shu)施(shi)肥(fei)中(zhong)出(chu)現(xian)的(de)一(yi)些(xie)失(shi)誤(wu),各(ge)地(di)棉(mian)區(qu)都(dou)有(you)不(bu)同(tong)程(cheng)度(du)的(de)發(fa)生(sheng),常(chang)會(hui)貽(yi)誤(wu)棉(mian)花(hua)生(sheng)產(chan)的(de)黃(huang)金(jin)季(ji)節(jie),導(dao)致(zhi)棉(mian)田(tian)麵(mian)積(ji)難(nan)以(yi)落(luo)實(shi),還(hai)會(hui)給(gei)棉(mian)花(hua)高(gao)產(chan)增(zeng)添(tian)障(zhang)礙(ai)。
為此,我們必須吸取棉花播種育苗移栽過程中施肥的教訓,采取正確措施,確保安全播種,全苗齊苗,壯苗早發。
苗miao床chuang底di肥fei,精jing而er適shi量liang。棉mian花hua幼you苗miao株zhu體ti較jiao小xiao,加jia之zhi子zi葉ye中zhong含han有you一yi定ding的de養yang分fen,不bu需xu施shi用yong過guo多duo的de底di肥fei,而er強qiang調tiao精jing而er適shi量liang。一yi是shi農nong家jia積ji造zao的de有you機ji肥fei一yi定ding要yao充chong分fen腐fu熟shu,並bing要yao剔ti除chu殘can餘yu的de雜za草cao根gen莖jing;二是選用生物有機肥的每10平方米的苗床不超過5公斤,複合肥不宜超過1公斤;三是選用腐熟人糞尿的,要提前20天施用,施後翻耕拌勻;四是切忌用尿素作苗床底肥。
大田底肥,深施早施。當前,不少棉田未翻耕預留棉行,準備工作滯後,棉花前茬中滿幅油菜、小麥麵積擴大,施用底肥時間緊迫,因此,當務之急一要抓緊深耕預留棉行,並結合深施底肥;二要在油菜、小麥收後搶施早施底肥;三是高含量的複合肥每畝以30~40公斤為宜,千萬不要比著多施底肥。
mianmiaozhuifei,zhongzaiqingsu。mianhuamiaoqizhuifei,wulunzaimiaochuanghuodatianyizaizhihou,zhuishifeiliaozuijiyiciyongliangguoda,yinweimianhuayingyangtixiao,genxiyounen,wuxudaliangdefeiliao,feiliangguoda,changhuichanshengfanshentou,zhishimianmiaoshuifendaoliu,yizhifayu。miaochuangshangyiyongfushudeqingshuifenhuoxibodeniaosurongyezhuishi,kepeishihuimanfengdenghuoxingyefei。datianyizaidemianmiaodaixinyezhankaihouzaizhuishiniaosu,meimuyongliangbuyichaoguo5公斤。
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