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2024年西南地區(qū)大豆玉米帶狀復(fù)合種植技術(shù)意見

2024-03-26 08:33:08 來源:全國農(nóng)業(yè)技術(shù)推廣服務(wù)中心 閱讀量:13781 評論

導(dǎo)讀:全國農(nóng)業(yè)技術(shù)推廣服務(wù)中心會(huì)同國家大豆玉米帶狀復(fù)合種植專家指導(dǎo)組,提出制定2024年西南地區(qū)大豆玉米帶狀復(fù)合種植技術(shù)意見。

  【農(nóng)機(jī)網(wǎng) 科技創(chuàng)新】 當(dāng)前西南地區(qū)大豆玉米帶狀復(fù)合種植即將進(jìn)入播種期。為進(jìn)一步提高帶狀復(fù)合種植技術(shù)規(guī)范化、高效化、標(biāo)準(zhǔn)化應(yīng)用水平,全國農(nóng)業(yè)技術(shù)推廣服務(wù)中心會(huì)同國家大豆玉米帶狀復(fù)合種植專家指導(dǎo)組,提出制定2024年西南地區(qū)大豆玉米帶狀復(fù)合種植技術(shù)意見。
 
  選配良種  做好包衣
 
  根據(jù)西南平壩、丘陵、山區(qū)氣候生態(tài)特性和大豆春播、夏播品種要求,選擇生育期積溫相匹配、耐蔭抗倒宜機(jī)收且相對抗病蟲品種,優(yōu)先從當(dāng)?shù)厥?市縣)農(nóng)業(yè)農(nóng)村部門推薦品種中選擇,其中帶狀復(fù)合種植的大豆品種要確保在當(dāng)?shù)亻g作或套作種植2年以上、畝產(chǎn)量穩(wěn)定在100公斤以上,種子純度≥98%,凈度≥99%,發(fā)芽率≥85%。針對大豆主要根部病蟲害,對大豆種子選擇大豆專用種衣劑進(jìn)行包衣,如6.25%咯菌晴·精甲霜靈懸浮種衣劑+噻蟲嗪,防控根腐病、地下害蟲并兼治苗期豆稈黑潛蠅等。
 
  適配行比  縮株增密
 
  春玉米—夏大豆帶狀套作地區(qū),適宜于四川、重慶三熟套作地區(qū),可選擇大豆:玉米行比為3:2或2:2模式,宜機(jī)播地區(qū)以3行大豆為主,人工播種及山區(qū)可選擇2行大豆;大豆行距30厘米、玉米行距40厘米,大豆玉米間距60—70厘米,機(jī)播機(jī)收條件下選擇70厘米,由一個(gè)大豆帶與玉米帶構(gòu)成的生產(chǎn)單元寬度為2.2—2.4米。春(夏)玉米—春大豆帶狀間作地區(qū),適宜于西南各省油(菜)茬大豆玉米帶狀間作兩熟三作地區(qū),選擇大豆:玉米行比為4:2或3:2(高海拔區(qū))模式,大豆帶寬100厘米、帶內(nèi)行距30—40厘米,根據(jù)播種機(jī)適當(dāng)調(diào)整,玉米行距40厘米,大豆玉米間距60—70厘米,人工收獲玉米的區(qū)域可選擇60厘米、機(jī)收玉米或光照偏弱的區(qū)域選擇70厘米,由一個(gè)大豆帶與玉米帶構(gòu)成的生產(chǎn)單元寬度為2.6—2.8米。
 
  大豆單粒穴播,株距8—10厘米,人工種植可雙粒穴播,穴距16—20厘米,確保帶狀套作每畝播種10000粒、有效株數(shù)7000—8000株,帶狀間作每畝播種10000—12000 粒、有效株數(shù)7500—8500株;玉米單粒穴播,套作株距13—15厘米、間作株距12—14厘米,人工種植可雙粒穴播(穴距加倍),確保畝有效穗3500穗以上、畝播粒數(shù)4000粒以上。
 
  調(diào)整播期  精量勻播
 
  根據(jù)種植方式及品種特性合理確定播期,與春玉米帶狀套作的夏大豆于小麥?zhǔn)斋@后6月上中旬視土壤墑情適時(shí)播種。川渝丘陵區(qū)帶狀間作應(yīng)在凈作油菜或小麥?zhǔn)斋@后的4月下旬—5月上中旬播種春大豆,或在6月中下旬間種夏大豆;云貴山區(qū)的春玉米—春大豆帶狀間作則根據(jù)當(dāng)?shù)貧鉁卦?月中下旬播種。
 
  帶狀套作區(qū)在玉米播種前需利用微耕機(jī)拖拉機(jī)旋耕整地,做到廂面平整、土壤疏松、土塊細(xì)碎,大豆采用免耕直播,有前茬小麥地塊可結(jié)合秸稈量多少進(jìn)行滅茬還田或直接貼茬播種。四川、重慶等地的油(菜)茬大豆玉米帶狀間作采用免耕直播方式,播前對秸稈粉碎滅茬,或選擇帶旋耕滅茬裝置的播種施肥機(jī)直接播種;其它春玉米春大豆帶狀間作區(qū)按照當(dāng)?shù)卣亓?xí)慣進(jìn)行土地耕整和秸稈處理。帶狀套作播種可選用3(4)行密植精量播種機(jī),帶狀間作可選用6行勺輪式或氣力式大豆玉米一體化播種機(jī),實(shí)現(xiàn)精量勻播針對丘陵山區(qū)不宜拖拉機(jī)作業(yè)的地塊可選擇微耕機(jī)帶動(dòng)或手推式播種施肥器,部分不能機(jī)械作業(yè)的地方采用人工播種方式。機(jī)械播種時(shí)根據(jù)土壤墑情及時(shí)調(diào)整深度,玉米播深3—5厘米,大豆不宜太深,以3厘米左右為宜,避免因暴雨前播種導(dǎo)致土壤板結(jié)不能出苗。土壤墑情差的地塊應(yīng)在播種后及時(shí)滴灌或微噴灌水一次,確保苗齊苗全苗壯。
 
  科學(xué)施肥  降高控旺
 
  玉米按當(dāng)?shù)爻D暧衩桩a(chǎn)量和每產(chǎn)100公斤籽粒需氮2.5—3公斤氮計(jì)算施氮量,可一次性用高氮緩控釋肥(含氮>25%)作種肥施用,也可種肥+穗肥兩次施用。帶狀套作播種時(shí)每畝施40—50公斤玉米專用三元復(fù)合肥(如:15—15—15),大喇叭口期結(jié)合機(jī)播大豆,距離玉米帶20—25厘米處每畝追施尿素20公斤或30—40公斤高氮復(fù)合肥(如:28—8—6);帶狀間作玉米播種時(shí)每畝施用50—60公斤高氮緩控釋肥(如:28—8—6)(折合純氮14—16公斤/畝)。大豆種肥,高肥力田塊不施氮肥,中低肥力田塊少量施用低氮平衡復(fù)合肥,建議畝施純氮2.0—2.5公斤;在大豆3—5片復(fù)葉、初花期、結(jié)莢期與鼓粒期,噴施氨基酸葉面肥與98%磷酸二氫鉀,促進(jìn)花莢發(fā)育和結(jié)實(shí)鼓粒。水源便利的地方建議實(shí)施水肥一體化,做到營養(yǎng)精準(zhǔn)調(diào)控,或通過微噴灌、滴灌措施解決苗期、花莢期的季節(jié)性干旱問題,同時(shí)做好洪澇災(zāi)害的排水措施。
 
  對水肥條件好、株型高大玉米品種,在7—10片全展葉用矮豐、胺鮮·乙烯利等化控藥劑控制株高。對肥水條件好、有旺長趨勢的大豆,在分枝期(4—5片復(fù)葉)與初花期用5%的烯效唑可濕性粉劑,或30%多唑甲哌鎓,噴施莖葉;對套作大豆蔭蔽較重地塊可在大豆2—3片復(fù)葉期增噴一次。大豆玉米帶狀間作也可在大豆3—5片復(fù)葉(或玉米拔節(jié)期)與初花期用無人機(jī)噴施30%多唑甲哌鎓。
 
  封定除草  一噴多防(促)
 
  采用苗前封閉與苗后莖葉除草相結(jié)合,根據(jù)當(dāng)?shù)剞r(nóng)業(yè)部門意見進(jìn)行除草。封閉除草:在播后芽前土壤墑情適宜的條件下,選用精異丙甲草胺(或二甲戊靈)+唑嘧磺草胺(或噻吩磺隆)等對水噴霧。莖葉除草:在玉米3—5葉期或大豆2—3片復(fù)葉選擇禾豆兼用型除草劑對水噴霧。如果噴施在玉米或大豆分別登記的除草劑,需用雙系統(tǒng)分帶噴霧機(jī)隔離分帶噴霧,或用噴桿噴霧機(jī)或背負(fù)式噴霧器加裝定向噴頭和隔離罩分別對著大豆帶或玉米帶噴藥,避免藥劑噴施或漂移到?jīng)]有登記的作物上引起藥害。
 
  病蟲害防治采用物理、生物與化學(xué)防治相結(jié)合。出苗—分枝(喇叭口)期:針對食葉蛾類、甲蟲和粉虱、蚜蟲等刺吸害蟲開展病蟲防治,有條件可設(shè)置智能LED集成波段殺蟲燈、性誘捕器、釋放寄生蜂等防治各類害蟲。玉米大喇叭口—抽雄期和大豆結(jié)莢—鼓粒期:針對當(dāng)?shù)刂饕v(穗)部病蟲危害,采用廣譜、高效、低毒殺蟲劑和針對性殺菌劑等進(jìn)行統(tǒng)一防治。斜紋夜蛾、高隆象、食心蟲等大豆花莢期常見的害蟲可用高效氯氟氰菊酯或甲維·蟲螨腈等殺蟲劑兌水防治;草地貪夜蛾、玉米螟、棉鈴蟲可用乙基多殺菌素、茚蟲威等殺蟲劑防治。施藥應(yīng)在成蟲產(chǎn)卵期至幼蟲低齡期實(shí)施統(tǒng)防統(tǒng)治或聯(lián)防聯(lián)控,對分散發(fā)生區(qū)實(shí)施重點(diǎn)挑治和點(diǎn)殺點(diǎn)治。田間施藥盡可能采用機(jī)械噴藥或無人機(jī)、固定翼飛機(jī)航化作業(yè);各時(shí)期病蟲害防控可根據(jù)田間病蟲發(fā)生情況結(jié)合栽培管理措施,適當(dāng)選用殺蟲劑、殺菌劑、增效劑、葉面肥、調(diào)節(jié)劑等混合噴施,實(shí)施“一噴多效”的規(guī)?;y(tǒng)防統(tǒng)治??蛇x用11.6%甲維·氯蟲苯甲酰胺懸浮劑1500倍液或40%聯(lián)苯·噻蟲嗪懸浮劑1500倍液+15%三唑酮可濕性粉劑700倍液+98%磷酸二氫鉀50克+含氨基酸葉面肥30毫升+飛防助劑10毫升,對水30公斤人工噴霧或2.5—3.0升無人機(jī)噴施。
 
  適時(shí)收獲  高質(zhì)減損
 
  西南大部分地區(qū)先收玉米,云南、貴州部分地區(qū)先收大豆。先收作物的整機(jī)寬度應(yīng)至少小于后收作物帶間距離20厘米以上,防止收獲作業(yè)時(shí)夾帶后收作物造成損失。先收玉米可選用整機(jī)寬度不大于1.6米等窄型兩行自走式玉米聯(lián)合收獲機(jī),在玉米籽粒乳線消失、頂部出現(xiàn)黑層時(shí)及時(shí)收獲摘穗,收獲時(shí)期為春玉米7月下旬至8月上旬、夏玉米9月中下旬;再用專用大豆收獲機(jī)或改造后的谷物收獲機(jī)在完熟期收獲大豆,春大豆為9月中下旬、夏大豆為10月下旬至11月上旬。先收大豆可選用大豆聯(lián)合收獲機(jī)(3行大豆模式下的整機(jī)寬度不大于1.8米,4行大豆模式下的整機(jī)寬度不大于2.1米),再用玉米收獲機(jī)收獲玉米。
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