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2024年棉花春季生产技术指导意见

2024-03-27 08:33:32 来源:全国农业技术推广服务中心 阅读量:11175 评论

导读:农业农村部种植业管理司会同全国农业技术推广服务中心、农业农村部棉花专家指导组有关专家,针对各主产区天气特点和生产实际,研究提出2024年棉花春季生产技术指导意见。

  【农机网 热点关注】 为指导各地搞好棉花春季播种、苗期和蕾期管理工作,确保全年棉花单产品质双提升,农业农村部种植业管理司会同全国农业技术推广服务中心、农业农村部棉花专家指导组有关专家,针对各主产区天气特点和生产实际,研究提出2024年棉花春季生产技术指导意见。
 
  西北内陆棉区
 
  (一)播前准备。做好残膜清理、深施基肥、耕地整地、土壤封闭处理。犁地前亩施商品有机肥20公斤、尿素20公斤、磷酸二铵15公斤、硫酸钾5公斤或复合肥40公斤。土壤适墒时犁地整地,犁地深度28—30厘米,整地做到上虚下实、土壤细碎,边角整齐、地面平整、无残茬残膜。然后对土壤表面喷施33%二甲戊灵乳油除草剂,再耙抹一遍。
 
  (二)品种选择。选“早熟、优质、高产、抗病、适宜机采”的品种,北疆陆地棉选生育期120—122天的品种,南疆陆地棉选生育期125—128天的品种,南疆长绒棉选生育期130—135天的品种,株形紧凑,第一果枝节位高度≥18厘米,抗倒伏,吐絮集中,脱叶性落叶性好。
 
  (三)种植模式。采用一膜六行或一膜三行机采棉种植模式,66厘米+10厘米或64厘米+12厘米宽窄行配置,株距9—10厘米,每亩1.3万—1.5万株。优先选择滴头流量为2.2—2.6升/小时、滴孔间距为25—30厘米的滴灌带,采用一膜三带或一膜两管铺设在宽窄行中间,保障滴水均匀。
 
  (四)精量播种。当5厘米地温连续3天稳定达到12°C时即可播种,北疆适播期一般在4月10日—25日,南疆4月5日—20日。采用精量播种技术,做到播深一致,下籽均匀,播种量每亩1.5—1.8公斤,一穴一粒。选用厚度0.01—0.015毫米、幅宽2.05米地膜,铺膜要平整紧贴地面,侧膜覆土严实。采用干播湿出(滴水出苗)方式播种,播种深度1厘米左右。
 
  (五)播后管理。播种后48小时内及时滴水每亩10—15方,盐碱重的棉田每亩滴水20方,并随水滴施腐植酸肥料或生物菌剂。一周后进行第二次滴水每亩10—15方,滴水量不宜过大,防止土壤板结。出苗前遇雨及时中耕1—2次,中耕深度15厘米左右,防止次生盐渍化、烂种、烂根。及时压埋没有覆土的边膜,防止大风揭膜。
 
  (六)苗期管理化学调控子叶期喷施缩节胺0.8—1.0克;2—7叶期根据主茎节间长度或植株高宽比进行化调2—3次,亩喷施缩节胺1.5克左右,保障主茎节间长度小于5厘米,植株宽度大于高度。中耕除草遇低温、雨水天气和田间杂草偏多情况下,及时进行中耕除草。病虫防治及时防治棉蓟马、苗病、棉蚜虫、枯萎病等。
 
  蕾期管理化学调控植株营养生长偏旺、主茎节间长度大于7厘米时,亩喷施缩节胺1—2克,以有效控制节间长度,防止棉花旺长,促进早现蕾现大蕾。施头水头做到早搭丰产架子、促进集中成熟。北疆6月5日—10日,南疆6月10日—15日在盛蕾期滴施头水头肥。每亩滴水量15—20方、追施尿素2—3公斤和高磷低钾肥1—2公斤。病虫防治重点防治棉蚜、盲蝽蟓、棉铃虫和枯黄萎病等,提倡使用生物药剂,交替用药,合理用药。
 
  )灾害预防。棉花生产前期,低温、冷害、倒春寒、大风、雨雪天气常年发生,要加强灾害性天气过程监测预报,制定应急预案,及时采取科学有效预防措施,成灾后要尽快采取救灾措施,将损失减少到最低程度。
 
  黄河流域棉区
 
  )一熟春棉
 
  1.播前准备。做好整地施肥,清理干净残留地膜,亩施足量有机肥与棉花专用复合肥40—50公斤,随后旋耕。做好造墒保墒,一般棉田亩灌水50—60方,轻度盐碱地80—100方,中度盐碱地100—150方,重度盐碱地150—200方,当土壤湿度适宜时耙耱2遍,待适期播种。
 
  2.适期播种。适宜播期为4月中下旬,“冷尾暖头”播种,选择抗病、早熟、吐絮集中的高产优质棉花品种。手采棉采用宽窄行配置,行距80—90厘米×45厘米,机采棉76厘米等行距配置,播种深度2—3厘米,亩播种量1.0—1.5公斤。滴灌干播湿出的棉田,采用机械一次性完成播种、覆膜和滴灌管铺设,播后亩滴水20—25方。
 
  3.封闭除草。混土型除草剂在耙耱前地表喷施,如氟乐灵乳油等,亩用量100—150毫升。封闭型除草剂播种后均与喷施于地表,如二甲戊灵乳油等,亩用量120—160毫升。
 
  4.苗期管理。放苗定苗出苗后及时放苗,3—4片真叶时定苗,亩留苗4000—6000株。中耕除草苗期雨后及时中耕,松土除草。起垄培土现蕾后在棉行培土形成约15厘米高的垄背。病虫防治选用双丙环虫酯或氟啶虫胺腈悬浮剂+吡蚜酮可湿粉剂等进行喷雾防治蚜虫。防治盲蝽可喷施氟啶虫胺腈悬浮剂等药物,连续用药两次,间隔5—7天。喷施阿维菌素乳油防治红蜘蛛,尽量使药液喷到叶片背面。
 
  (二)蒜后直播棉
 
  1.品种选择。选用株型紧凑、吐絮畅、生育期100—105天的短季抗虫棉品种,如鲁棉532、鲁棉551等。
 
  2.精量播种。适宜播期为5月25日左右,最迟在6月5日前,确保6月10日前齐苗。5月20日前后(大蒜收获前3—4天)灌水一次,大蒜收获后,采用楼耙机机械去除蒜茬地膜,旋耕耙实,采用精量播种机播种,播种深度2.5厘米,76厘米等行距种植。播期较早每亩4500—6000株,较晚播种可增加至每亩5000—6000株。播种后出苗前用二甲戊灵乳油进行表土喷雾封闭除草。
 
  3.化控施肥。从第5片真叶展开时开始化控,株高控制在80—90厘米。化控以“少量多次、前轻后重”为原则,遇阴雨天气可适当加大用量。可不施底肥,盛蕾期每亩一次性追施纯氮10公斤,花铃期可喷施生物叶面肥。
 
  长江流域棉区
 
  (一)机械直播棉
 
  1.播前准备联合收获机收获前茬作物(小麦、油菜),秸秆粉碎还田均匀覆盖地表后,每亩均匀撒施有机肥200公斤左右,土壤深松后足墒镇压。
 
  2.精量播种。选用优质早熟集中成铃棉花品种,每亩播种量1.5公斤左右,播种深度2厘米,76厘米等行距精量播种,每穴一粒,每亩成苗5000株以上。
 
  3.大田除草。播种后出苗前用乙草胺乳油对土壤表面均匀喷雾,或用二甲戊灵均匀喷雾后再耙匀进行封闭除草。苗期混生杂草严重的棉田可用乙羧氟草醚乳油加精喹禾灵乳油进行喷雾除草。棉花株高30厘米以上时,用草甘膦对杂草茎叶进行定向喷雾。雨后适墒中耕,耕深10—14厘米,耕宽22厘米以上。
 
  4.苗期管理。长势较弱和晚发的棉田,可施用尿素加营养型植物生长调节剂进行2—3次叶面喷雾。苗期重点防治蜗牛、地老虎、棉蓟马、棉盲蝽、棉蚜以及立枯病、炭疽病等病虫害。棉苗3—4片真叶时进行一次中耕作业。
 
  5.蕾期管理。盛蕾期一次性施用蕾肥,每亩施生物有机肥50公斤和45%(15-15-15)的复合肥50公斤,加尿素5—10公斤和钾肥5—10公斤,施肥深度15厘米,施后中耕培蔸。提倡无人机飞防和统防统治进行病虫害标准化防控。
 
  (二)麦(油)后移栽棉
 
  选用成铃性强、抗性好的高产优质棉花品种,提倡进行轻简基质穴盘育苗。前茬作物收获后应及时移栽,移栽棉苗应达到2叶1心以上,移栽密度每亩1500—2500株为宜,行距100厘米左右。棉花蕾期至初花期处于梅雨季节,要注意保持棉田“三沟”通畅,其他田间管理措施和病虫害防控同机械直播棉。
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