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地點: 無錫市
開展時間: 2025-03-29
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2022年西南地區大豆玉米帶狀復合種植技術意見
2022-03-25
11:36:41
來源:全國農業技術推廣服務中心 作者:國家大豆玉米帶狀復合種植專家指導組 閱讀量:19967
評論
【農機網 地方農機】西南地區是我國大豆玉米帶狀復合種植最集中的產區,年推廣面積約占全國的1/3,即將進入大豆播種期。為提高復合種植技術規范化、高效化、標準化應用水平,堅持“優選良種、培育壯苗,合理配比、適當密植,降高控旺、適期收獲”的技術路線,制定了2022年西南地區大豆玉米帶狀復合種植技術意見。
(一)優選品種。大豆:春玉米夏大豆帶狀套作區,選用南夏豆38、貢秋豆8號、渝豆11等高產耐蔭抗倒品種;春玉米春大豆帶狀間作區,選用南豆27、云黃13、滇豆7號等耐蔭抗倒品種。玉米:選用緊湊或半緊湊型高產、耐密、宜機收的春播品種,如仲玉3號、正紅6號、云瑞668等。在播種前選擇大豆專用種衣劑進行包衣,防控地下害蟲并兼治苗期豆稈黑潛蠅等害蟲,有條件的地方利用根瘤菌接種。
(二)機械播種。帶狀套作:玉米于3月下旬至4月上旬播種、大豆于6月上中旬播種,可選用玉米大豆密植
播種機,通過更換播種盤、調整單體個數和帶間距實現玉米、大豆同機播種;推薦2:3模式,即2行玉米、3行大豆,玉米帶寬40厘米,大豆帶寬60—70厘米,玉米帶與大豆帶間距60—70厘米。帶狀間作:云南、貴州等帶狀間作春玉米、春大豆于4月上中旬播種,四川、重慶等帶狀間作夏玉米、春大豆于5月中下旬播種,可選用勺輪式或氣力式玉米大豆一體化播種機,推薦2:4模式,即2行玉米、4行大豆,玉米帶寬40厘米,大豆帶寬90—120厘米,玉米帶與大豆帶間距70厘米。帶狀間作或套作要確保玉米株距12—14厘米、大豆株距9—11厘米,玉米畝基本苗3900—4300株、大豆畝基本苗8500—9500株。針對丘陵山區不宜
拖拉機作業的地塊可選擇
微耕機帶動或手推式播種施肥器。
(三)合理施肥。對帶狀套作,播種時畝施40—50公斤玉米專用復合肥,大喇叭口期結合機播大豆,距離玉米帶20—25厘米處畝追施玉米專用復合肥40—50公斤。對帶狀間作,玉米播種時畝施高氮緩控釋肥50—60公斤(折合純氮14—16公斤/畝),大豆播種時畝施低氮緩控釋肥15—20公斤(折合純氮2—3公斤/畝)。在大豆分枝期、初花期和鼓粒初期,結合病蟲防控和化學調控噴施葉面肥,畝用90%磷酸二氫鉀50克+氨基酸多元素水溶肥50毫升,套作大豆在初花期可添加8%胺鮮脂20克/畝。
(四)除草控旺。雜草防除。采用芽前封閉與苗后定向除草相結合的方式。播后芽前用96%精異丙甲草胺乳油,如闊葉草較多可混加15%噻吩磺隆除草;苗后玉米4葉期與拔節期定向除草,玉米可用75%噻吩磺隆,大豆用25%氟磺胺草醚水劑或10%精喹禾靈乳油+25%氟磺胺草醚(20毫升+20克型)1套/畝。帶狀間作苗期施藥時用物理隔簾將玉米、大豆隔開,防止藥物漂移產生藥害。降高控旺。玉米在7—10片全展葉,按推薦劑量使用胺鮮脂、乙烯利合劑控制株高,注意控制勻速噴藥。在大豆分枝期、初花期可用烯效唑可濕性粉劑兌水噴施莖葉,控制莖葉旺長。
(五)統防病蟲。對斜紋夜蛾、高隆象等大豆花期常見的害蟲,可用2.5%高效氯氟氰菊酯或12%甲維·蟲螨腈兌水防治。對草地貪夜蛾,可用球孢白僵菌、綠僵菌等生物制劑和乙基多殺菌素、茚蟲威等化學農藥,在幼蟲低齡期實施統防統治和聯防聯控,對分散發生區實施重點挑治和點殺點治。注意農藥交替使用、輪換使用、安全使用。
(六)機械收獲。西南大部分地區先收玉米,云南、貴州部分地區先收大豆,其中春玉米和夏玉米收獲期分別是7月下旬至8月上旬和9月中下旬,春大豆和夏大豆收獲期分別是9月中下旬和10月下旬至11月上旬。先收作物的整機寬度應至少小于后收作物帶間距離20厘米以上,防止收獲作業時夾帶后收作物造成損失。先收玉米可選用整機寬度不大于1.6米的窄型兩行自走式玉米聯合收獲機,再用大豆收獲機收大豆。先收大豆可選用大豆聯合收獲機(3行大豆模式下的整機寬度不大于1.8米,4行大豆模式下的整機寬度不大于2.1米),再用玉米收獲機收獲玉米。
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