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”死(si)苗(miao)。二(er)是(shi)施(shi)用(yong)未(wei)充(chong)分(fen)腐(fu)熟(shu)的(de)有(you)機(ji)肥(fei)料(liao),雜(za)草(cao)的(de)種(zhong)子(zi)隨(sui)之(zhi)導(dao)入(ru),苗(miao)床(chuang)上(shang)雜(za)草(cao)比(bi)棉(mian)苗(miao)長(chang)得(de)還(hai)快(kuai),形(xing)成(cheng)草(cao)荒(huang)苗(miao)。三(san)是(shi)有(you)的(de)選(xuan)用(yong)尿(niao)素(su)做(zuo)苗(miao)床(chuang)底(di)肥(fei),尿(niao)素(su)中(zhong)含(han)有(you)少(shao)量(liang)的(de)縮(suo)二(er)脲(niao),對(dui)種(zhong)子(zi)發(fa)芽(ya)有(you)不(bu)良(liang)影(ying)響(xiang),種(zhong)子(zi)受(shou)到(dao)毒(du)害(hai)易(yi)爛(lan)種(zhong)無(wu)苗(miao),或(huo)隻(zhi)能(neng)萌(meng)發(fa)極(ji)少(shao)的(de)受(shou)傷(shang)棉(mian)苗(miao)。四(si)是(shi)追(zhui)肥(fei)選(xuan)用(yong)衝(chong)施(shi)肥(fei),未(wei)按(an)劑(ji)量(liang)用(yong)肥(fei),也(ye)易(yi)發(fa)生(sheng)灼(zhuo)傷(shang)棉(mian)苗(miao)的(de)現(xian)象(xiang)。五(wu)是(shi)棉(mian)苗(miao)移(yi)栽(zai)之(zhi)前(qian),在(zai)棉(mian)花(hua)大(da)田(tian)底(di)肥(fei)用(yong)量(liang)過(guo)大(da)、guoqian,tebieshigaohanliangdefuhefei,yiciyongliangguodahou,mianhuamiaozizaihoujiangerbufa。liushiyoudezhuozhuangmianmiao,zaihouyicizhuishiniaosuchaoguochangyongshifeiliang,mianhuayoujingyouhongbianhei,zhenyeshenlvnongsuo,ziyekuwei,yanzhongdezhengzhukusi。shangshushifeizhongchuxiandeyixieshiwu,gedimianqudouyoubutongchengdudefasheng,changhuiyiwumianhuashengchandehuangjinjijie,daozhimiantianmianjinanyiluoshi,haihuigeimianhuagaochanzengtianzhangai。
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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