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2024年山西省高粱生產技術指導意見
2024-04-02
08:33:51
來源:山西省農業農村廳 閱讀量:14707
評論
【農機網 地方農機】 為切實加強技術支撐,進一步提升我省高粱生產水平,結合氣象條件和生產實際,特制定2024年山西省高粱生產技術指導意見。
一、選擇良種
因地制宜選擇經審(認)定、登記推廣的優質、高產、抗逆性強的專用品種。晉北地區高粱種植以早熟品種為主,可選擇敖雜1號、晉早5564、晉早5577、晉雜28號、晉雜41號、晉雜22號、晉雜12號、紅糯16號等品種。晉中、晉東南、晉南地區高粱種植以中晚熟品種為主,可選擇晉中405、晉雜34號、晉雜31號、晉雜22號、晉雜12號、晉粱111、晉糯3號、晉糯102、紅糯16號、紅纓子等品種。
二、選地整地
高粱忌連作,前茬以大豆、玉米、馬鈴薯等茬口為宜。要注意了解前茬除草劑使用情況,避免對高粱造成藥害。建議在秋季前茬收獲后抓緊秸稈粉碎還田和整地,耕翻深度25~30厘米,耕后地表平整,無大土塊和殘茬,表土上虛下實,達到“春墑秋保、春苗秋抓”的目的。
三、適期播種
(一)播期。依據品種生育期、地溫和土壤墑情確定播期。一般5厘米耕層地溫穩定在10~12℃時,土壤含水量在15%~20%為宜。晉北地區適播期大多在5月中旬,晉中、晉東南、晉南地區適播期多在5月初。晚熟品種適時搶墑早播,早熟品種適時晚播。春旱嚴重的山區、坡地、朝陽地塊,可適時早播,低洼易澇、平原地塊適當晚播。
(二)種子處理。播種前進行曬種,在戶外陽光下將種子平鋪3~5厘米厚,曬2~3天即可。建議選用經種子包衣或藥劑處理后的種子。
(三)播種方法。等行距種植,行距50~60厘米;寬窄行種植,寬行行距70~80厘米,窄行行距30厘米。播種深度3~4厘米,播后完成覆土、鎮壓。
四、合理密植
根據品種特點、當地生態、生產條件、土壤肥力和種植習慣等確定密度。粒用高粱中稈品種(株高在1.6~1.8米)畝留苗一般在0.7萬~0.8萬株,矮稈品種(株高在1.3~1.5米)畝留苗可達2萬株。每畝播種量根據種子實際發芽率進行適量播種,一般發芽率在95%以上的,中稈品種畝播種量0.3~0.5公斤。一般發芽率在80%~90%的,中稈品種畝播種量0.5~0.7公斤。精量
播種機播種時要做好清選、曬種,保證種子大小均勻、整齊一致。
五、田間管理
(一)間苗除草。精量播種地塊可不間苗。人工間苗在4~6葉期進行,除草可結合間苗和中耕進行2次。在播種后出苗前噴施高粱專用除草劑(50%異丙甲草胺·莠去津懸浮劑150~200克/畝對水32升)封閉除草。一般不建議苗后化學除草,易產生藥害。若必須苗后除草,可在3~5葉期前后根據田間不同雜草類型選用適宜的高粱專用苗后除草劑除草,注意施用劑量及施用時期。
(二)肥水管理。分期施肥、科學減量,增施基肥、施足種肥,適時追肥。一般畝施農家肥3000公斤、氮磷鉀復合肥(優選高氮、中磷、低鉀配比、總養分含量達40%以上的肥料)25~40公斤,可根據當地土壤基礎養分情況和目標產量適當調整。農家肥作底肥,復合肥結合播種一次性施入,為提高產量,可在拔節期畝追施10~15公斤尿素或在拔節期和灌漿期分別選用磷酸二氫鉀100克+蕓苔素內酯5毫升+尿素100克,對水30~40升,葉面噴施高粱全株。施種肥時注意種、肥分開,以防燒種,影響出苗。高粱耐旱耐澇,但拔節孕穗和抽穗開花是需水關鍵期,如遇干旱,有條件地區應及時灌水。
(三)病蟲害防治。絲黑穗病、螟蟲、蚜蟲是高粱常見病蟲害。可因地制宜地通過輪作倒茬、選用抗病品種、藥劑拌種、適時早播等農業措施防治。利用頻振燈、黃板等物理措施防治害蟲。拔節至抽穗開花期注意早防早治蚜蟲,大喇叭口期用藥劑灌心或噴施防治螟蟲。防治絲黑穗病可用6%戊唑醇懸浮種衣劑6~9 克拌100公斤高粱種子。
六、適時收獲
適宜收獲期在蠟熟末期,此時收獲籽粒飽滿,產量最高,品質最佳。機收可在籽粒達到完熟期、葉片枯死后,籽粒含水率下降到20%左右時,使用
聯合收割機進行收割。
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