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2024年高粱生產技術指導意見

2024-05-08 09:40:28 來源:全國農業技術推廣服務中心 閱讀量:19293 評論

  【農機網 科技創新】 為充分發揮高粱耐旱、耐鹽堿等優勢特性,促進產量與品質協同提高,提高種植者收益,滿足市場不同需求,根據今年生產形勢和氣候特點,農業農村部小宗糧豆專家指導組會同全國農業技術推廣服務中心,以“優選良種、種子處理、合理茬口、精細播種、科學肥水、風險防控、適期收獲”為重點,提出2024年高粱生產技術指導意見。
 
  優選良種處理
 
  依據用途(釀酒、食用、飼用等)選用經國家登記、適應性好、抗逆性強、品質優良的專用高產品種。春播品種要結合當地生態條件,在保證安全成熟的前提下,生育期不宜過短,以充分利用光溫水土條件;夏播高粱作為夏收作物的后茬,宜采用早熟或中熟品種。雨量充沛地區,宜選擇中散穗型品種,以抑制穗部病蟲害。機械化收獲的,宜選擇矮稈、整齊度好、不易落粒的品種。謹防購買夸大宣傳、跨區引進的品種。做好種子處理,播前3—4天曬種3—5小時,注意清除雜質。對未包衣種子,建議進行種子包衣或拌種處理,根據本地區病蟲害發生特點,因地制宜科學選擇種衣劑。
 
  合理茬口栽培
 
  高粱不宜重茬,一般選大豆、玉米等茬口;注意詳細了解前茬除草劑使用情況,避免造成藥害。精細整地,北方秋季前茬收獲后抓緊整地(起壟),蓄水保墑,延長土壤熟化時間,達到“春墑秋保、春苗秋抓”目的;秋季未起壟的春季頂漿做壟,保蓄冬季積蓄于土壤表層的水分;一般耕地深度20—30厘米,提倡深翻,有條件的結合施用農家肥,也可翻、耙、種一次完成。栽培模式可單作高粱,也可與大豆、花生、食用豆等間作,提倡寬窄行栽培。干旱地塊采取免耕播種或平播、壟溝播種等方式,適當深播淺覆土,也可采用地膜覆蓋、膜下滴灌、“坐水”播種或澆水增墑后播種等抗旱節水措施;低洼地塊提早起壟散墑、提高地溫,壟上播種,適當晚播。播種應深淺一致、覆土薄厚一致,種子與土壤緊密接觸,一般覆土厚度不超過3厘米,播后鎮壓保墑。推薦使用高粱播種機
 
  適時適量播種
 
  依據品種生育期、地溫和土壤墑情確定播期,一般10厘米耕層地溫穩定在12℃左右,土壤含水量在15%—20%為宜(大多為5月初)。春播地區宜適當晚播。根據品種特點、當地生態、生產條件、土壤肥力、施肥管理和種植習慣等確定密度,粒用高粱畝密度一般0.7萬—1.2萬株,特殊品種2萬株。精量播種機播種時做好清選、曬種,保證種子大小均勻、整齊一致,一般畝播量0.4—0.5公斤,青飼青貯高粱根據具體情況適當加大播種量,人工播種需適當加大播種量。西南高粱產區采用育苗移栽種植的,應適時早栽。一般苗齡25—30天,最遲不超過35天(葉齡6葉左右)移栽。利用雨后搶墑或灌足水后移栽,栽后施清糞水。
 
  做好肥水管理
 
  肥料施用按照分期施肥、科學減量,增施基肥,施足種肥,適時追肥原則進行。一般畝施農家肥3000公斤,化肥用量折合純氮 11—13公斤,五氧化二磷5—8公斤,氧化鉀3—5公斤,并根據當地土壤情況和目標產量適當調整。農家肥作底肥,磷肥、鉀肥及全部氮肥的30%結合播種一次性施入,全部氮肥的60%做拔節肥,10%做粒肥。施種肥時注意種、肥分開,以防燒種,影響出苗。如果采用一次性施肥方式,選用的肥料要長效短效結合,避免生育后期脫肥。高粱耐旱,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。
 
  加強風險防控
 
  4—6葉期結合間苗和中耕進行除草,一般2次。精量播種地塊可不間苗,在播種后出苗前噴施高粱專用除草劑封閉除草。一般不建議苗后化學除草,若必須苗后除草,可在5—8葉期前后施用高粱專用除草劑。嚴格控制除草劑種類、用量及噴施時期,以免造成藥害。絲黑穗病、靶斑病、炭疽病、螟蟲、蚜蟲、粘蟲是高粱常見病蟲害,防治方法包括選用抗病品種,因地制宜進行輪作倒茬、種子處理、適時播種、適宜用藥等。春播高粱區注意絲黑穗病、玉米螟等,夏播高粱區注意蚜蟲、玉米螟等,南方高粱區注意玉米螟、炭疽病等,應早防早控。可采用地面噴施或揚撒合適藥劑防治地下害蟲、黑穗病等;在大喇叭口期噴施蘇云金桿菌,采用殺蟲燈、性誘劑、投放赤眼蜂等物理、生物方法防治螟蟲。開花前,無人機等噴施適宜藥劑,結合插草把誘蛾產卵滅殺棉鈴蟲。在幼蟲3齡前防治粘蟲。蚜蟲呈點片發生時,可用適宜藥劑防控。此外還應加強對災害性天氣的預防,及早制定相應的應急處置預案。特別注意防范早春低溫冷害、干旱、澇災和秋季早霜。
 
  適期收獲晾曬
 
  當籽粒呈現品種固有形狀和顏色,粒質變硬,穗下部籽粒內含物硬化成臘質狀,粒色光亮,含水率降至20%左右時收獲。可以采用人工或聯合收割機收獲。采用收割機收獲時,要控制收割機行走速度,減少機收損失。食用高粱要適當早收,在蠟熟末期即可收獲。南方區春播高粱收獲期一般在7月份,常常高溫多雨,建議該區高粱進入臘熟末期后,及時收獲,抓緊晾曬,確保產量和質量。
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