今年(nian)小麥(mai)秋種(zhong)工(gong)作總的思路(lu)是:以綠色(se)高(gao)質(zhi)(zhi)高(gao)效為目(mu)標(biao),以規范化播種(zhong)、寬幅(fu)精播、播后鎮壓為關鍵技術,進(jin)一步優化種(zhong)植結構,全面提高(gao)播種(zhong)質(zhi)(zhi)量,奠定小麥(mai)豐收基礎。重點抓好以下(xia)關鍵環節:
一、優化品種布局,逐步擴大優質專用小麥種植面積
品(pin)(pin)種是小(xiao)麥(mai)增產的(de)內因,選(xuan)好品(pin)(pin)種非(fei)常(chang)重(zhong)要。目前(qian),我省有統計(ji)面(mian)積的(de)小(xiao)麥(mai)品(pin)(pin)種116個(ge),品(pin)(pin)種數量較多,給農(nong)戶科學(xue)選(xuan)種帶來了(le)極大(da)困(kun)難。因此,各級農(nong)業(ye)部門一定要根據當地品(pin)(pin)種示范比較試驗,引(yin)導(dao)農(nong)戶科學(xue)選(xuan)擇優良品(pin)(pin)種,搞好品(pin)(pin)種布局。隨著優質專用(yong)小(xiao)麥(mai)需求量的(de)增加(jia)和種植(zhi)效(xiao)益的(de)提高,各地在進行品(pin)(pin)種布局時,要對接加(jia)工企業(ye)與農(nong)戶,加(jia)大(da)訂單生產的(de)力(li)度(du),適(shi)當擴(kuo)大(da)優質專用(yong)小(xiao)麥(mai)的(de)種植(zhi)面(mian)積。重(zhong)點抓好以下工作:
(一(yi))因地制宜選擇優(you)良品種
1.種植優(you)質專用(yong)小麥地(di)區(qu),重(zhong)點選用(yong)以(yi)下(xia)品種:濟麥229、紅地(di)95、濟南(nan)17、洲元9369、師欒02-1、藁優(you)5766、藁優(you)9415、泰山27、煙農19號(hao)、泰科麥33、科農2009、裕(yu)田(tian)麥119、淄(zi)麥28等。
2.水澆條件較好地區,重點(dian)種植(zhi)以下品(pin)種:濟麥(mai)22、魯原502、太麥(mai)198、山(shan)(shan)(shan)(shan)農(nong)(nong)(nong)(nong)(nong)(nong)28號、鑫麥(mai)296、山(shan)(shan)(shan)(shan)農(nong)(nong)(nong)(nong)(nong)(nong)20、泰(tai)農(nong)(nong)(nong)(nong)(nong)(nong)18、良星(xing)99、山(shan)(shan)(shan)(shan)農(nong)(nong)(nong)(nong)(nong)(nong)30、峰川9號、濟麥(mai)23、山(shan)(shan)(shan)(shan)農(nong)(nong)(nong)(nong)(nong)(nong)29號、菏麥(mai)19、煙(yan)農(nong)(nong)(nong)(nong)(nong)(nong)999、泰(tai)山(shan)(shan)(shan)(shan)28、山(shan)(shan)(shan)(shan)農(nong)(nong)(nong)(nong)(nong)(nong)24號、汶農(nong)(nong)(nong)(nong)(nong)(nong)17、儒麥(mai)1號、青農(nong)(nong)(nong)(nong)(nong)(nong)2號、煙(yan)2415、山(shan)(shan)(shan)(shan)農(nong)(nong)(nong)(nong)(nong)(nong)32號、山(shan)(shan)(shan)(shan)農(nong)(nong)(nong)(nong)(nong)(nong)31號、煙(yan)1212、登海(hai)202、菏麥(mai)20、郯麥(mai)98、汶農(nong)(nong)(nong)(nong)(nong)(nong)14、山(shan)(shan)(shan)(shan)農(nong)(nong)(nong)(nong)(nong)(nong)23、煙(yan)農(nong)(nong)(nong)(nong)(nong)(nong)24等。
3.水澆條件較差的旱(han)地(di),主要種植品種:青麥(mai)6號(hao)、煙農21、山(shan)農16、山(shan)農25、煙農0428、青麥(mai)7號(hao)、陽(yang)光10號(hao)、菏麥(mai)17、濟麥(mai)262、紅地(di)166、齊民7號(hao)等。
4.中度(du)鹽(yan)堿(jian)地(土壤(rang)含鹽(yan)量2‰-3‰),主(zhu)要種(zhong)植(zhi)品種(zhong):濟南18、德抗961、山融3號、青麥(mai)6號、山農25等。
(二)搞好種子處理
做好種子包衣、藥劑拌種,可以防治或推遲小麥根腐病、莖基腐病、紋枯病等病害的發病時間,減輕秋苗發病,壓低越冬菌源,同時控制苗期地下害蟲危害。提倡用種衣劑進行種子包衣,預防苗期病蟲害。沒有用種衣劑包衣的種子要用藥劑拌種。根莖部病害發生較重的地塊,可選用4.8%苯醚·咯菌腈按種子量的0.2%~0.3%拌種,或2%戊唑醇按種子量的0.1%~0.15%拌種,或30g/L的苯醚甲環唑懸浮種衣劑按照種子量的0.3%拌種;地下害蟲發生較重的地塊,選用40%辛硫磷乳油按種子量的0.2%拌種,或者30%噻蟲嗪種子處理懸浮劑按種子量的0.23%~0.46%拌種。病、蟲混發地塊用殺菌劑+殺蟲劑混合拌種,可選用32%戊唑·吡蟲啉懸浮種衣劑(ji)按照種子量的(de)0.5%~0.75%拌(ban)(ban)種,或用(yong)27%的(de)苯(ben)醚甲環唑·咯菌(jun)腈·噻(sai)蟲嗪懸浮種衣劑(ji)按照種子量的(de)0.5%拌(ban)(ban)種,對早期小麥根腐(fu)病(bing)、莖基(ji)腐(fu)病(bing)及麥蚜具有較好(hao)的(de)控制效果。
二、以深耕翻為突破口,切實提高整地質量
多年(nian)的實(shi)踐證明,秸稈還田地(di)塊(kuai)常年(nian)旋耕或者(zhe)深松,容易加重病蟲(chong)草(cao)害的發生程度,也不利于提高整地(di)質量(liang)。因此,今年(nian)秋種,各地(di)要以深耕翻為突破口,切實(shi)提高整地(di)質量(liang)。
(一(yi))確保打(da)碎打(da)細還田(tian)秸(jie)稈
一是要根據玉(yu)米(mi)(mi)種植(zhi)規格、品種、所(suo)具(ju)備的(de)動(dong)力機(ji)(ji)(ji)械、收獲(huo)要求(qiu)等(deng)條件,分別(bie)選擇懸掛式(shi)(shi)、自走式(shi)(shi)和割(ge)臺(tai)互換(huan)式(shi)(shi)等(deng)適宜的(de)玉(yu)米(mi)(mi)聯合收獲(huo)機(ji)(ji)(ji);二是秸(jie)稈(gan)還田機(ji)(ji)(ji)械要選用(yong)甩刀(dao)式(shi)(shi)、直(zhi)刀(dao)式(shi)(shi)、鍘切式(shi)(shi)等(deng)秸(jie)稈(gan)粉碎(sui)性能高的(de)機(ji)(ji)(ji)具(ju),確保作業質(zhi)量;三(san)是最好(hao)在玉(yu)米(mi)(mi)聯合收獲(huo)機(ji)(ji)(ji)粉碎(sui)秸(jie)稈(gan)的(de)基礎上,再(zai)用(yong)玉(yu)米(mi)(mi)秸(jie)稈(gan)還田機(ji)(ji)(ji)打1~2遍,確保將玉(yu)米(mi)(mi)秸(jie)稈(gan)打碎(sui)打細,秸(jie)稈(gan)長度最好(hao)在5厘米(mi)(mi)以下。
(二)施足基肥
各地要在推行玉米聯合收獲和秸稈還田的基礎上,廣辟肥源、增施農家肥,努力改善土壤結構,提高土壤耕層的有機質含量。一般高產田畝施有機肥2500~3000公斤;中低產田畝施有機肥3000~4000公斤。不同地力水平化肥的(de)適(shi)宜施用量(liang)參考值為:
產量水平在每畝300~400公斤的中產田,每畝施用純氮(N)10~12公斤,磷(P2O5)4~6公斤,鉀(K2O)4~6公斤,磷鉀肥底施,氮(dan)肥(fei)50%底施,50%起身期(qi)追肥(fei)。
產量水平在每(mei)(mei)畝(mu)400~500公(gong)斤(jin)(jin)的(de)高產田,每(mei)(mei)畝(mu)施(shi)(shi)用純氮(N)12~14公(gong)斤(jin)(jin),磷(P2O5)6~7公(gong)斤(jin)(jin),鉀(K2O)5~6公(gong)斤(jin)(jin),磷鉀肥(fei)底施(shi)(shi),氮肥(fei)40~50%底施(shi)(shi),50~60%起身期或拔節期追(zhui)肥(fei)。
產量水平在每畝500~600公斤的超高產田,每畝施用純氮(N)14~16公斤,磷(P2O5)7~8公斤,鉀(K2O)6~8公斤,磷肥底(di)施(shi)(shi),氮、鉀肥(fei)(fei)40~50%底(di)施(shi)(shi),50%~60%拔(ba)節期追肥(fei)(fei)。缺少微量(liang)元(yuan)素的地塊,要(yao)注意補施(shi)(shi)鋅肥(fei)(fei)、硼肥(fei)(fei)等。要(yao)大力推廣化肥(fei)(fei)深(shen)施(shi)(shi)技術,堅決杜絕地表撒施(shi)(shi)。
(三)大犁深耕
土(tu)(tu)壤深耕首先可(ke)(ke)以掩埋有(you)機(ji)(ji)肥(fei)料、作物(wu)秸(jie)稈(gan)、雜草(cao)和病(bing)蟲有(you)機(ji)(ji)體,能(neng)(neng)夠(gou)有(you)效減輕病(bing)蟲草(cao)害(hai)的(de)(de)發生程度;其(qi)次,可(ke)(ke)以打破(po)犁(li)底層,使土(tu)(tu)質變松軟(ruan),提高土(tu)(tu)壤滲水(shui)、蓄(xu)水(shui)、保肥(fei)和供肥(fei)能(neng)(neng)力,是抗旱保墑的(de)(de)重要(yao)技術措(cuo)施(shi);第三,可(ke)(ke)以疏松耕層,松散土(tu)(tu)壤,降(jiang)低(di)土(tu)(tu)壤容重,增(zeng)加孔隙度,改善通透性,促進好氣性微(wei)生物(wu)活(huo)動和養分釋放。近(jin)年來,隨著(zhu)翻(fan)轉犁(li)的(de)(de)出(chu)現(xian),解決了土(tu)(tu)壤深耕出(chu)現(xian)犁(li)溝的(de)(de)現(xian)象;隨著(zhu)機(ji)(ji)械牽(qian)引動力的(de)(de)增(zeng)加,深耕翻(fan)可(ke)(ke)以達到30厘米(mi)左(zuo)右。因此(ci),有(you)條(tiao)件(jian)的(de)(de)地區(qu),應逐漸加大機(ji)(ji)械深耕翻(fan)的(de)(de)推廣面積。
由于深耕(geng)效果可(ke)(ke)以(yi)維持多(duo)年,從節本增效角度(du)考慮,可(ke)(ke)以(yi)每隔(ge)2~3年深耕(geng)一次,其他年份(fen)采用旋耕(geng)或免耕(geng)等保護性(xing)耕(geng)作播(bo)種技術。
(四)耙耢鎮壓
耙(pa)耢(lao)(lao)可(ke)破(po)碎(sui)土(tu)(tu)垡、耙(pa)碎(sui)土(tu)(tu)塊、疏(shu)松(song)(song)(song)表土(tu)(tu)、平整地(di)面、塌實耕(geng)(geng)(geng)(geng)層(ceng)(ceng),使耕(geng)(geng)(geng)(geng)層(ceng)(ceng)上松(song)(song)(song)下(xia)實,減少蒸發(fa)、抗旱保墑,因此在深耕(geng)(geng)(geng)(geng)或旋耕(geng)(geng)(geng)(geng)后(hou)都(dou)應及時(shi)(shi)(shi)耙(pa)地(di)。近年來,我省部分(fen)(fen)地(di)區旋耕(geng)(geng)(geng)(geng)面積較(jiao)大(da),旋耕(geng)(geng)(geng)(geng)后(hou)的(de)麥(mai)田表層(ceng)(ceng)土(tu)(tu)壤(rang)松(song)(song)(song)暄(xuan),如果不先耙(pa)耢(lao)(lao)鎮壓再播種,不僅會導致播種過深形成(cheng)深播弱(ruo)苗,嚴重(zhong)影響小麥(mai)分(fen)(fen)蘗的(de)發(fa)生,造(zao)成(cheng)穗數不足;而(er)且還會造(zao)成(cheng)播種后(hou)很快失(shi)墑,影響次生根(gen)的(de)生長和下(xia)扎(zha),冬季易受凍導致黃弱(ruo)苗或死(si)苗。鎮壓有壓實土(tu)(tu)壤(rang)、壓碎(sui)土(tu)(tu)塊、平整地(di)面的(de)作(zuo)用(yong),當耕(geng)(geng)(geng)(geng)層(ceng)(ceng)土(tu)(tu)壤(rang)過于疏(shu)松(song)(song)(song)時(shi)(shi)(shi),鎮壓可(ke)使耕(geng)(geng)(geng)(geng)層(ceng)(ceng)緊密(mi)(mi),提高(gao)耕(geng)(geng)(geng)(geng)層(ceng)(ceng)土(tu)(tu)壤(rang)水(shui)(shui)分(fen)(fen)含量(liang),使種子與土(tu)(tu)壤(rang)緊密(mi)(mi)接(jie)觸(chu),根(gen)系及時(shi)(shi)(shi)噴發(fa)與伸長,下(xia)扎(zha)到(dao)深層(ceng)(ceng)土(tu)(tu)壤(rang)中,一般(ban)深層(ceng)(ceng)土(tu)(tu)壤(rang)水(shui)(shui)分(fen)(fen)含量(liang)較(jiao)高(gao)、較(jiao)穩定,即使上層(ceng)(ceng)土(tu)(tu)壤(rang)干旱,根(gen)系也能從深層(ceng)(ceng)土(tu)(tu)壤(rang)中吸收到(dao)水(shui)(shui)分(fen)(fen),提高(gao)麥(mai)苗的(de)抗旱能力(li)和田間水(shui)(shui)分(fen)(fen)利(li)用(yong)效率,麥(mai)苗整齊健壯。因此,各類麥(mai)田都(dou)要注意鎮壓環節。
(五(wu))科(ke)學(xue)確定畦田種植規格(ge)
實(shi)行(xing)(xing)(xing)小(xiao)麥畦(qi)(qi)(qi)田化(hua)栽培,有利于澆水和(he)省肥(fei)省水。因(yin)此,各(ge)類有水澆條(tiao)件(jian)的(de)麥田,一(yi)定要在整地時打埂筑(zhu)畦(qi)(qi)(qi)。但目前我省不(bu)同地區畦(qi)(qi)(qi)的(de)大(da)小(xiao)、畦(qi)(qi)(qi)內(nei)(nei)小(xiao)麥種植(zhi)(zhi)行(xing)(xing)(xing)距(ju)(ju)(ju)千差萬別,嚴重影響(xiang)了下(xia)茬玉(yu)米(mi)(mi)(mi)機械(xie)種植(zhi)(zhi)。因(yin)此,今(jin)年秋種,各(ge)地應(ying)(ying)充分考慮農(nong)機農(nong)藝結合的(de)要求(qiu),按照下(xia)茬玉(yu)米(mi)(mi)(mi)機械(xie)種植(zhi)(zhi)規(gui)(gui)格的(de)要求(qiu),確定好適(shi)宜的(de)畦(qi)(qi)(qi)寬(kuan)(kuan)和(he)小(xiao)麥播(bo)種行(xing)(xing)(xing)數和(he)行(xing)(xing)(xing)距(ju)(ju)(ju)。全(quan)省重點推薦以下(xia)兩種種植(zhi)(zhi)規(gui)(gui)格:第一(yi)種:畦(qi)(qi)(qi)寬(kuan)(kuan)2.4米(mi)(mi)(mi),其中(zhong),畦(qi)(qi)(qi)面寬(kuan)(kuan)2米(mi)(mi)(mi),畦(qi)(qi)(qi)埂0.4米(mi)(mi)(mi),畦(qi)(qi)(qi)內(nei)(nei)播(bo)種8行(xing)(xing)(xing)小(xiao)麥,采用(yong)寬(kuan)(kuan)幅(fu)播(bo)種,苗(miao)帶(dai)寬(kuan)(kuan)8~10厘米(mi)(mi)(mi)左右(you),畦(qi)(qi)(qi)內(nei)(nei)小(xiao)麥行(xing)(xing)(xing)距(ju)(ju)(ju)0.28米(mi)(mi)(mi)。下(xia)茬在畦(qi)(qi)(qi)內(nei)(nei)種4行(xing)(xing)(xing)玉(yu)米(mi)(mi)(mi),玉(yu)米(mi)(mi)(mi)行(xing)(xing)(xing)距(ju)(ju)(ju)0.6米(mi)(mi)(mi)左右(you)。第二種:畦(qi)(qi)(qi)寬(kuan)(kuan)1.8米(mi)(mi)(mi),其中(zhong),畦(qi)(qi)(qi)面寬(kuan)(kuan)1.4米(mi)(mi)(mi),畦(qi)(qi)(qi)埂0.4米(mi)(mi)(mi),畦(qi)(qi)(qi)內(nei)(nei)播(bo)種6行(xing)(xing)(xing)小(xiao)麥,采用(yong)寬(kuan)(kuan)幅(fu)播(bo)種,苗(miao)帶(dai)寬(kuan)(kuan)8~10厘米(mi)(mi)(mi)左右(you),畦(qi)(qi)(qi)內(nei)(nei)小(xiao)麥行(xing)(xing)(xing)距(ju)(ju)(ju)0.28米(mi)(mi)(mi)。下(xia)茬在畦(qi)(qi)(qi)內(nei)(nei)種3行(xing)(xing)(xing)玉(yu)米(mi)(mi)(mi),玉(yu)米(mi)(mi)(mi)行(xing)(xing)(xing)距(ju)(ju)(ju)0.6米(mi)(mi)(mi)左右(you)。具體(ti)選(xuan)用(yong)那種種植(zhi)(zhi)規(gui)(gui)格應(ying)(ying)充分考慮水澆條(tiao)件(jian)等因(yin)素,一(yi)般水澆條(tiao)件(jian)好的(de)地塊盡量要采用(yong)大(da)畦(qi)(qi)(qi),水澆條(tiao)件(jian)差的(de)采用(yong)小(xiao)畦(qi)(qi)(qi)。
三、以寬幅精播和播后鎮壓為突破口,切實提高播種質量
在小麥(mai)播種環節中,要特別重視適量(liang)播種、寬(kuan)幅(fu)精播、播后(hou)鎮壓等關鍵措施。
(一)適墑播種
小(xiao)麥(mai)播(bo)種(zhong)(zhong)時耕(geng)層(ceng)的(de)適(shi)(shi)(shi)宜(yi)墑(di)情(qing)為土(tu)壤相對含水(shui)量的(de)70%~75%。在(zai)(zai)適(shi)(shi)(shi)宜(yi)墑(di)情(qing)的(de)條件(jian)下播(bo)種(zhong)(zhong),能保(bao)證一(yi)次全苗,使種(zhong)(zhong)子根和次生(sheng)根及(ji)時長出,并下扎到深層(ceng)土(tu)壤中,提高小(xiao)麥(mai)抗(kang)旱(han)(han)能力,因此播(bo)種(zhong)(zhong)前墑(di)情(qing)不足時要提前澆水(shui)造(zao)墑(di)。在(zai)(zai)適(shi)(shi)(shi)期內,應(ying)掌(zhang)握“寧可(ke)適(shi)(shi)(shi)當晚播(bo),也要造(zao)足底墑(di)”的(de)原則,做到足墑(di)下種(zhong)(zhong),確(que)保(bao)一(yi)播(bo)全苗。水(shui)澆條件(jian)較好的(de)地區,可(ke)在(zai)(zai)前茬(cha)作物(wu)收獲前10~14天(tian)澆水(shui),既有利于秋(qiu)作物(wu)正常成熟(shu),又為秋(qiu)播(bo)創造(zao)良好的(de)墑(di)情(qing)。秋(qiu)收前來不及(ji)澆水(shui)的(de),可(ke)在(zai)(zai)收后開(kai)溝(gou)造(zao)墑(di),然后再耕(geng)耙(pa)整地;或者先(xian)耕(geng)耙(pa)筑畦(qi)后灌(guan)水(shui),待墑(di)情(qing)適(shi)(shi)(shi)宜(yi)時耘鋤耙(pa)地,然后播(bo)種(zhong)(zhong)。也可(ke)以(yi)采用先(xian)筑畦(qi)播(bo)種(zhong)(zhong),后灌(guan)水(shui)蟄實的(de)方法,要注意(yi)待地表墑(di)情(qing)適(shi)(shi)(shi)宜(yi)時及(ji)時劃鋤破土(tu)出苗。無水(shui)澆條件(jian)的(de)旱(han)(han)地麥(mai)田,要在(zai)(zai)前茬(cha)收獲后,及(ji)時進行耕(geng)翻,并隨耕(geng)隨耙(pa)鎮壓,保(bao)住地下墑(di)情(qing)并根據氣象預報確(que)定播(bo)期。
(二)適期播種
溫(wen)度是決(jue)定小麥(mai)(mai)播(bo)種期(qi)(qi)(qi)的主要因素。小麥(mai)(mai)從播(bo)種至越冬開始(shi)0℃以上積溫(wen)570~650℃為(wei)宜(yi)。各地要在試驗示(shi)范的基(ji)礎上,因地制宜(yi)地確定適(shi)(shi)(shi)宜(yi)播(bo)期(qi)(qi)(qi)。魯東、魯中(zhong)、魯北的小麥(mai)(mai)適(shi)(shi)(shi)宜(yi)播(bo)期(qi)(qi)(qi)一般為(wei)10月1日(ri)(ri)至10月10日(ri)(ri),最佳(jia)(jia)播(bo)期(qi)(qi)(qi)為(wei)10月3日(ri)(ri)至10月8日(ri)(ri);魯西的適(shi)(shi)(shi)宜(yi)播(bo)期(qi)(qi)(qi)為(wei)10月3日(ri)(ri)至10月12日(ri)(ri),最佳(jia)(jia)播(bo)期(qi)(qi)(qi)為(wei)10月5日(ri)(ri)至10月10日(ri)(ri);魯南(nan)、魯西南(nan)為(wei)10月5日(ri)(ri)至15日(ri)(ri),最佳(jia)(jia)播(bo)期(qi)(qi)(qi)為(wei)10月7日(ri)(ri)至12日(ri)(ri)。如不能在適(shi)(shi)(shi)期(qi)(qi)(qi)內播(bo)種,要注意適(shi)(shi)(shi)當(dang)加大播(bo)量(liang),做到播(bo)期(qi)(qi)(qi)播(bo)量(liang)相結(jie)合。
(三)寬幅精量播種
實行(xing)(xing)(xing)(xing)寬(kuan)(kuan)幅(fu)精量播(bo)(bo)(bo)(bo)(bo)種(zhong)(zhong)(zhong)(zhong)(zhong),改傳統(tong)(tong)小(xiao)行(xing)(xing)(xing)(xing)距(ju)(15~20厘(li)米(mi))密(mi)集條播(bo)(bo)(bo)(bo)(bo)為等行(xing)(xing)(xing)(xing)距(ju)(22~25厘(li)米(mi))寬(kuan)(kuan)幅(fu)播(bo)(bo)(bo)(bo)(bo)種(zhong)(zhong)(zhong)(zhong)(zhong),改傳統(tong)(tong)密(mi)集條播(bo)(bo)(bo)(bo)(bo)籽粒擁擠一條線為寬(kuan)(kuan)播(bo)(bo)(bo)(bo)(bo)幅(fu)(8~10厘(li)米(mi))種(zhong)(zhong)(zhong)(zhong)(zhong)子分散式粒播(bo)(bo)(bo)(bo)(bo),有(you)利于(yu)種(zhong)(zhong)(zhong)(zhong)(zhong)子分布均(jun)勻,減少(shao)缺(que)苗(miao)(miao)(miao)斷壟、疙(ge)瘩苗(miao)(miao)(miao)現象,克服了傳統(tong)(tong)播(bo)(bo)(bo)(bo)(bo)種(zhong)(zhong)(zhong)(zhong)(zhong)機密(mi)集條播(bo)(bo)(bo)(bo)(bo),籽粒擁擠,爭(zheng)肥,爭(zheng)水(shui),爭(zheng)營(ying)養,根少(shao)、苗(miao)(miao)(miao)弱的生長(chang)狀況。因(yin)此,各(ge)地(di)要大(da)力推行(xing)(xing)(xing)(xing)小(xiao)麥寬(kuan)(kuan)幅(fu)播(bo)(bo)(bo)(bo)(bo)種(zhong)(zhong)(zhong)(zhong)(zhong)機械播(bo)(bo)(bo)(bo)(bo)種(zhong)(zhong)(zhong)(zhong)(zhong)。要注(zhu)意給播(bo)(bo)(bo)(bo)(bo)種(zhong)(zhong)(zhong)(zhong)(zhong)機械加裝(zhuang)鎮壓裝(zhuang)置,播(bo)(bo)(bo)(bo)(bo)種(zhong)(zhong)(zhong)(zhong)(zhong)深(shen)度3~5厘(li)米(mi),播(bo)(bo)(bo)(bo)(bo)種(zhong)(zhong)(zhong)(zhong)(zhong)機不能行(xing)(xing)(xing)(xing)走太(tai)快,以(yi)每(mei)小(xiao)時5公(gong)里為宜(yi)(yi),以(yi)保證下(xia)種(zhong)(zhong)(zhong)(zhong)(zhong)均(jun)勻、深(shen)淺一致、行(xing)(xing)(xing)(xing)距(ju)一致、不漏(lou)播(bo)(bo)(bo)(bo)(bo)、不重播(bo)(bo)(bo)(bo)(bo)。在(zai)適(shi)(shi)期播(bo)(bo)(bo)(bo)(bo)種(zhong)(zhong)(zhong)(zhong)(zhong)情況下(xia),分蘗(bo)(bo)成穗(sui)率低的大(da)穗(sui)型品種(zhong)(zhong)(zhong)(zhong)(zhong),每(mei)畝(mu)適(shi)(shi)宜(yi)(yi)基(ji)本苗(miao)(miao)(miao)15萬(wan)~18萬(wan);分蘗(bo)(bo)成穗(sui)率高的中多穗(sui)型品種(zhong)(zhong)(zhong)(zhong)(zhong),每(mei)畝(mu)適(shi)(shi)宜(yi)(yi)基(ji)本苗(miao)(miao)(miao)12萬(wan)~16萬(wan)。在(zai)此范圍內,高產田(tian)(tian)宜(yi)(yi)少(shao),中產田(tian)(tian)宜(yi)(yi)多。晚(wan)于(yu)適(shi)(shi)宜(yi)(yi)播(bo)(bo)(bo)(bo)(bo)種(zhong)(zhong)(zhong)(zhong)(zhong)期播(bo)(bo)(bo)(bo)(bo)種(zhong)(zhong)(zhong)(zhong)(zhong),每(mei)晚(wan)播(bo)(bo)(bo)(bo)(bo)2天(tian),每(mei)畝(mu)增加基(ji)本苗(miao)(miao)(miao)1萬(wan)~2萬(wan)。
對于小(xiao)麥規模化種(zhong)(zhong)植面(mian)積(ji)較大的(de)農戶(hu),提倡采(cai)用(yong)小(xiao)麥多功能一體機(ji)寬(kuan)幅(fu)播種(zhong)(zhong)技術(shu)。該(gai)技術(shu)是在玉米(mi)秸稈還田(tian)環境下,不進行(xing)耕(geng)翻整地作(zuo)(zuo)業,由專(zhuan)門機(ji)械一次(ci)進地可完(wan)成(cheng)間隔深松、播種(zhong)(zhong)帶旋耕(geng)、分層(ceng)施肥(fei)、寬(kuan)幅(fu)精量播種(zhong)(zhong)、播后鎮壓等多項作(zuo)(zuo)業,具(ju)有(you)顯(xian)著的(de)節(jie)本(ben)、增效作(zuo)(zuo)用(yong)。
(四)播后鎮壓
從近(jin)幾年的(de)(de)生產經驗看,小(xiao)麥(mai)(mai)播(bo)后(hou)(hou)鎮(zhen)壓是提高小(xiao)麥(mai)(mai)苗(miao)期抗旱(han)能力和出(chu)苗(miao)質量(liang)的(de)(de)有效措施(shi)。因此,各地要選用(yong)(yong)帶鎮(zhen)壓裝置的(de)(de)小(xiao)麥(mai)(mai)播(bo)種(zhong)機械,在(zai)小(xiao)麥(mai)(mai)播(bo)種(zhong)時隨種(zhong)隨壓,然后(hou)(hou),在(zai)小(xiao)麥(mai)(mai)播(bo)種(zhong)后(hou)(hou)用(yong)(yong)專門的(de)(de)鎮(zhen)壓器鎮(zhen)壓兩遍,提高鎮(zhen)壓效果。尤其是對于秸稈還(huan)田地塊,一定要在(zai)小(xiao)麥(mai)(mai)播(bo)種(zhong)后(hou)(hou)用(yong)(yong)鎮(zhen)壓器多(duo)遍鎮(zhen)壓,才(cai)能保證(zheng)小(xiao)麥(mai)(mai)出(chu)苗(miao)后(hou)(hou)根系正常生長,提高抗旱(han)能力。
四、及時查苗補種,確保苗勻苗齊
小(xiao)(xiao)麥要(yao)(yao)高(gao)產(chan),苗全(quan)苗勻(yun)是關鍵。因此,小(xiao)(xiao)麥播種(zhong)(zhong)(zhong)后(hou)(hou),要(yao)(yao)及時(shi)到地(di)里查看墑(di)情(qing)和(he)出(chu)苗情(qing)況,玉米秸稈還(huan)田地(di)塊(kuai)在墑(di)情(qing)不(bu)足時(shi),要(yao)(yao)在小(xiao)(xiao)麥播種(zhong)(zhong)(zhong)后(hou)(hou)立即澆(jiao)“蒙頭”水,墑(di)情(qing)適(shi)宜時(shi)摟劃破土,輔助出(chu)苗。這樣(yang),有(you)利于小(xiao)(xiao)麥苗全(quan)、苗齊(qi)、苗壯。小(xiao)(xiao)麥出(chu)苗后(hou)(hou),對于有(you)缺苗斷壟地(di)塊(kuai),要(yao)(yao)盡早進行補種(zhong)(zhong)(zhong)。補種(zhong)(zhong)(zhong)方法:選擇與該(gai)地(di)塊(kuai)相同(tong)品種(zhong)(zhong)(zhong)的(de)種(zhong)(zhong)(zhong)子(zi),進行種(zhong)(zhong)(zhong)子(zi)包衣或(huo)藥劑拌種(zhong)(zhong)(zhong)后(hou)(hou),開溝(gou)均勻(yun)撒種(zhong)(zhong)(zhong),墑(di)情(qing)差的(de)要(yao)(yao)結合澆(jiao)水補種(zhong)(zhong)(zhong)。