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关于印发《雨涝灾害下玉米青贮机械化技术指引》的通知

2023-08-25 09:22:30 来源:农机化总站 阅读量:15701 评论

导读:农机化总站组织农业农村部畜牧水产养殖全程机械化专家指导组制定了《雨涝灾害下玉米青贮机械化技术指引》,现印发你们,请参考使用。

  农机化总站〔2023〕127号
 
  各有关单位:
 
  当前,“三秋”玉米青贮即将开始,为有效应对雨涝灾害对玉米青贮机械化作业带来的不利影响,保障畜牧业生产,我站组织农业农村部畜牧水产养殖全程机械化专家指导组制定了《雨涝灾害下玉米青贮机械化技术指引》,现印发你们,请参考使用。
 
  农业农村部农业机械化总站
  2023年8月23日
 
  雨涝灾害下玉米青贮机械化技术指引
 
  为有效应对雨涝灾害对玉米青贮机械化作业带来的不利影响,提高作业效率和收获质量,制定《雨涝灾害下玉米青贮机械化技术指引》,提出机械化作业技术方案,指导各地开展雨涝灾害下的玉米青贮机械化作业。
 
  一、技术路线
 
  雨涝灾害下玉米青贮机械化作业技术路线如图所示:
 

  雨涝灾害下玉米青贮机械化作业技术路线图
 
  二、收获方式和机具选择
 
  对于积水田块,及时疏通沟渠、打通田间排水通道或利用抽排水机具,抢排积水。进地前3~5天对田块中的沟渠、垄台予以平整。
 
  (一)收获方式
 
  1.直接收获。采用青饲料收获机在田间一次性完成收割、切碎、籽粒破碎、抛送装填(打捆裹包)的玉米青贮机械化作业。
 
  2.分段收获。采用高杆割晒机或人工将玉米植株割倒晾晒(或采用带玉米秸秆扎捆的茎穗兼收机作业),再收集转运,集中铡切。
 
  (二)机具选择
 
  1.直接收获方式机具宜选用接地比压不超过24kPa的履带自走式青饲料收获机、四驱轮式青饲料收获机、半履带轮式青饲料收获机、四驱水田轮式青饲料收获机。对于倒伏严重且植株折断比率较高的玉米,宜选用往复式、地滚刀式、镰刀式割台。选用自重轻、载重小的田间拉运车,或大马力拖拉机牵引的农业专用大尺寸轮胎青贮饲料专用拖车。
 
  2.分段收获方式机具宜选用高杆作物割晒机、带玉米秸秆扎捆的茎穗兼收机、配备高杆作物捡拾器的青饲料收获机、带有籽粒破碎的铡草机。
 
  三、机具调试改装
 
  作业开始前对收获机械进行一次全面维护和检查,确保机具在整个收获期能正常工作。选用适应倒伏的锥形装置、分禾元件和尖端延长件(如分禾夹爪),顺倒伏收获时扶禾器适当前移和降低,逆倒伏收获时扶禾器适当后移、向前倾斜,加大强制喂入装置预紧力。根据玉米倒伏情况,加长割台分禾尖或加装倒伏扶禾装置,适当减小割台倾角。
 
  经调试或改装后的收获机要做好试运转,认真检查收获机械的行走、转向、割台、喂入、切碎、籽粒破碎、抛送等机构的运行情况,检查升降系统是否工作正常;检查有无异响和漏油、漏水,割台、机架等部件有无变形等,发现问题逐一解决,保证试运转良好;调整收获机械的割台刀片和切碎刀具锐度,并提前做好零配件的储备,及时应对可能发生的机具故障。
 
  四、收获作业
 
  收获作业前应进行试收,试收长度10~15米,按作业质量标准检测试收效果,如不达标,应对有关工作部件进行适当调整,调整后,应再次试收检测,直至达到作业质量标准要求。
 
  (一)直接收获
 
  对于田间泥泞程度较小,机器通过不下陷、不打滑,玉米不倒伏或倒伏角小于30°的地块,采用直接收获方式作业。宜选择露水或霜消退后、日落温度下降返潮前开展作业。作业前,人工预先在地块四角割出收获机转向区,收获机由田块一角进入,沿一侧的玉米种植行方向前进,采用回形收获法,作业时适当降低速度,根据实际情况适当提高割茬高度。
 
  对于倒伏方向与种植行平行的玉米植株,倒伏角在30°~70°时采用逆倒伏方向收获方式,倒伏角在70°~85°时采用顺倒伏方向收获方式,对于倒伏方向不一致的玉米植株,宜采取往复收获作业方式。定期检查并适当调整割台高度,视玉米植株倒伏情况,调整收获机分禾器尖与地面的距离和倾角,注意观察易产生堵塞和缠绕的部件,如出现堵塞现象应停机清理,防止秸秆和泥土堆积。
 
  (二)分段收获
 
  对于田间泥泞程度重、机器易陷、植株含水率较高、倒伏角大于85°的地块,宜采用分段式收获方式作业。分段收获作业可选用高杆作物割晒机将玉米割倒并铺放在地面晾晒2~3天,再使用配备高杆作物捡拾器的青饲料收获机进行捡拾收获;或采用自重较轻的带玉米秸秆打捆的茎穗兼收机将玉米果穗摘下收集,同时将整株秸秆扎捆收集,转运至固定场地采用铡草机铡切;不具备机器进地条件的地块,采用人工收割并人工搬运至转运车或固定场地晾晒,用带籽粒破碎功能的铡草机进行铡切。
 
  五、青贮作业
 
  (一)打捆裹包青贮
 
  对收获后的青饲料,应选用带有菌液喷洒装置的高密度打捆机(750kg/m3)在地头或固定场地及时完成打捆。打捆的同时,菌液喷洒装置往青饲料里补充营养素和菌类添加剂以促进发酵。打捆后应在1~2小时内采用拉伸膜裹包机完成青贮饲料捆的密封裹包,也可采用细碎物料打捆包膜一体机一次性完成打捆裹包青贮作业。
 
  (二)堆贮或窖贮
 
  收获后青贮玉米碎料水分去除若能达到要求(如分段机械化收获后晾晒秸秆2~3天再切碎)可采用堆贮或窖贮的方式贮存。堆贮时,将物料逐层压紧堆放,用自重较大的机械反复碾压后加盖塑料布密封,也可使用真空泵排除剩余的空气使之形成良好的厌氧环境。窖贮时,青贮窖需提前3天清洗,进行太阳曝晒或用1%~2%的漂白粉溶液消毒。
 
  六、安全与维护
 
  提高安全生产意识。在水井、电线杆拉线等障碍物处设置醒目的警示标志,注意田间工况,防范湿滑道路侧翻风险,检查接地部件磨损情况,安全低速生产,避免事故发生;对于改装调整后存在安全隐患的部件,应加装防护装置并在明显位置设置安全警示标志;清理拥堵或处理故障前,应确保机具已经停车熄火。
 
  作业期间,及时清理作业机械上的泥沙、杂草及各运转部位的缠草,清理割台,定期加注润滑油;检查各易损件,适时更换调整;作业季结束后彻底清理收获机械内外泥沙、缠草等杂物;应按使用说明书要求对各部件进行一次彻底的维护保养。
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