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关于印发《黄淮海地区夏玉米(大豆)高性能免耕播种机应用指引》的通知

2023-05-22 11:20:14 来源:总站粮作机械处 阅读量:13005 评论

导读:总站联合农业农村部农作物生产全程机械化专家指导组制定了《黄淮海地区夏玉米(大豆)高性能免耕播种机应用指引》。

  农机化总站〔2023〕79号
 
  河北、山西、江苏、安徽、山东、河南、湖北、陕西等省农机中心(鉴定站、推广站):
 
  为贯彻落实《农业农村部办公厅关于进一步做好机械化播种质量提升工作的通知》(农办机〔2023〕1号),加快黄淮海地区高性能播种机示范推广,全方位提高粮食作物机播质量,有效发挥增产潜力,我站联合农业农村部农作物生产全程机械化专家指导组制定了《黄淮海地区夏玉米(大豆)高性能免耕播种机应用指引》,切实提高播种机应用效果,供参考使用。请各地因地制宜,细化操作规程,转化为农民易学易懂的图文视频,并加强技术指导和宣传培训,为提升黄淮海地区玉米(大豆)播种质量提供有效技术支撑保障。
 
  农业农村部农业机械化总站
 
  2023年5月18日
 
  黄淮海地区夏玉米(大豆)高性能免耕播种机应用指引
 
  农业农村部农业机械化总站
 
  农业农村部农作物生产全程机械化专家指导组
 
  当前,黄淮海夏种即将开始,玉米(大豆)苗齐、苗匀、苗壮是高产的重要基础,播种质量至关重要。在黄淮海地区推广应用高性能免耕播种机,提升玉米(大豆)播种质量和效率,对于提高粮食单产水平、保障国家粮食安全意义重大。针对黄淮海地区玉米(大豆)高性能免耕播种机大面积推广应用,制定本指引,其他作物和地区参照应用。
 
  一、机具选择与配套
 
  为抢农时,黄淮海地区一般采用免耕播种,种床基础较差,大量新鲜秸秆和根茬残留,容易造成播种机具拥堵和种子土壤结合不紧密;经过前茬小麦生产多次碾压,表层土壤容重大、较坚实,增加了播种开沟作业难度;部分地块土壤高低不平,提高了仿形难度,播种时容易造成深浅不一,整齐度差。选择机具时,应充分考虑种床基础,选择适用的高性能免耕播种机,并配套北斗自动导航驾驶系统和播种作业监测终端,提高播种质量。
 
  (一)高性能免耕播种机
 
  应具有破茬开沟、播种、施肥、覆土、镇压等功能。在小麦秸秆全量覆盖的情况下作业通过性强、作业速度高、无堵塞、播种质量好、能同时深施化肥。一般应配置指夹式或气力式排种器,提高播种粒距均匀性,减少重播、漏播,实现较高作业速度下均匀播种;应配置单体独立同步仿形机构,在播种机开沟器位置同步仿形,实现播种深度均匀一致,提高出苗整齐度;应配置V型或单体轮式苗带镇压机构,提高镇压效果,确保种子与土壤紧密结合。
 
  (二)北斗自动导航驾驶系统
 
  宜加装北斗自动导航驾驶系统,提高播种直线度和调头对行衔接性,提高作业精准度和前后环节作业匹配度,实现精准播种,为后期植保、对行收获创造条件,减轻机手劳动强度。应根据当地定位基站、网络信号、地块坡度、扩展性等因素,优先选择配置具有作业线共享功能、支持移动、联通和电信“三网合一”的网络差分方式的系统。
 
  (三)播种作业监测终端
 
  宜加装种子漏播等播种作业异常报警、质量监测设备,以便机手实时掌握排种器工作状态,避免缺种、漏播等。设备应具备种子漏播报警、实时作业速度显示、作业面积、各行播量(株数)和亩播量(株数)统计功能,及数据采集上传功能,能够在后台监测播种情况及作业轨迹情况。高速精准作业(10km/h以上)还应配备具有种子计数与落种间隔统计分析及显示功能的监测设备。监测设备的误差率应小于1%,对播种过程中灰尘、砂石、种子包衣、石墨粉等适应性强。
 
  二、作业前检修保养
 
  作业季节开始前,应按照产品使用说明书对播种机进行一次全面检查与保养,确保机具在整个播种期能正常工作,有效预防和减少作业故障,提高作业质量和效率。经保养或修理后的播种机应做好试运转,先局部后整体,认真检查地轮、传动部件、开沟器、排种器、施肥装置、风机、覆土器、镇压器、仿形机构等机构的运转、传动、调节情况,检查有无异常响声情况,运动是否灵活可靠;检查外露传动部件防护罩是否完好,重要部位螺栓、螺母有无松动,机架等部件有无变形等;发现问题应及时解决。备足备齐田间作业常用工具、零配件、易损零配件及油料等,以便出现故障时能够及时排除。
 
  三、选择适宜品种和播期
 
  (一)选用良种
 
  根据当地生产条件、地力基础和气候条件,选用经审定的优质高产、抗逆性强、适应性广、宜机化优良品种。玉米(大豆)高性能免耕播种机属单粒(精密)播种机,使用不达标种子会造成空穴,降低产量。因此,应选用合格的商品种,种子纯度、净度、发芽率、含水率达到标准要求,并采用种子包衣或药剂拌种进行病虫害防治,形成“高品质商品种+高性能播种机”联合应用方式。
 
  (二)适墒播种
 
  黄淮海地区一般在小麦收获后一周内完成播种,夏玉米应免耕播种,夏大豆可因地制宜浅耕后播种。小麦收获后,若墒情适宜,应立即抢墒播种;若墒情较差,应等墒播种或浇水造墒后播种;若适播期内未达到播种条件,应及时改种早熟品种,并适当增加种植密度。
 
  (三)合理密植
 
  根据品种特性、土壤肥力、管理水平等,确定适宜种植密度,构建合理群体结构。针对肥水供应充足、生产条件整体较好,且使用耐密抗倒伏品种地块,可适当增加密度,玉米亩播粒数增至5000粒,亩保苗增至4500—5000株,大豆亩播粒数增至13000—16000粒,亩保苗增至12000—15000株。根据亩播粒数和当地农艺要求确定合理的种植株距和行距,为下一步调整播种机的理论株距和行距奠定基础。黄淮海地区玉米行距一般为60cm、株距一般为20—25cm,大豆行距一般为30—40cm,株距一般为12—14cm。
 
  四、调整试播
 
  (一)机具调整
 
  正式播种作业前,应按当地农艺要求,根据产品说明书调整播种机,确保各项作业指标满足要求。
 
  1、选择适用的排种盘。通过更换排种器上的不同排种盘,可实现玉米、大豆等不同作物的播种。其中,气力式排种器适用于玉米和大豆播种,根据不同作物种子形状、粒度大小选择适宜孔径大小的排种盘;更换排种盘时,应先打开排种器壳体,使用专用工具拆卸种盘并更换,完成后将排种器壳体复位,并调整清种限位板位置和清种力度。指夹式排种器主要用于玉米播种,用于播种大豆时,可将指夹排种器更换为毛刷排种器,安装结构和空位应一致,并根据种子形状、粒度大小,校核指夹复位弹簧力度、调整清种毛刷位置。
 
  2、行距调整。各播种单元在播种机框架上应均匀排布。奇数播种行播种机,应先确定中间行播种单元的位置,再根据行距确定其他行播种单元的位置,并固定好,防止松动;偶数播种行播种机,应先确定中间两行播种单元的位置。
 
  3、株距调整。按照播种机上的株距调节指示图进行调整,气力式播种机的株距调整一般在更换排种盘选择孔径大小的同时确定适宜的吸种孔数量,并调节播种机传动装置实现;指夹式播种机应调节播种机传动装置。传动装置调整时,采用地轮传动方式的播种机主要调整塔轮齿数比,通过改变传动速比实现播种株距的调整;电驱播种机主要调节电驱控制器,在控制器中找出株距调整选项,输入所需要的株距即可实现株距的调整。
 
  4、清茬防堵调整。通过调节三点悬挂及机具自带限位,调整秸秆切割装置、破茬清垄机构的位置,查看能否较好的切断并清理播种带的秸秆和杂草,应达到播种行秸秆少、清垄一致性好、无雍土及堵塞现象。
 
  5、播深调整。作物播深根据土质、墒情及作物种类合理选择,一般玉米播深3—5cm,大豆播深3cm左右。播种机可通过播深轮上下位置或仿形限位轮手柄来调节。
 
  6、镇压力调整。覆土镇压力可通过镇压轮档位调节实现。玉米镇压力稍大,一般在档位II或III级镇压档位;大豆镇压力稍小,一般在档位I级镇压档位。
 
  7、排肥量调整。一般玉米每亩用高氮缓控释肥(含氮量高于28%)50—70kg,大豆每亩施用低氮缓控释肥(含量不超过15%)15—20kg。应按照播种机上的排肥量调节指示图,通过调整挡板开度或排肥轮转速实现大豆、玉米不同的排肥量。调整后应进行排量测试,作业过程中应关注肥管弯曲程度与流畅性,避免堆积堵塞。
 
  8、气力式播种机风机压力调整。气力式播种机应按照播种机说明书中行数等条件,对风机压力进行调整。播种过程中风机压力应稳定,一般控制在60—80mbar;应具备风压监测装置,实时监测风压情况。其中,拖拉机PTO驱动风机的播种机,通过调节拖拉机PTO输出转速实现合理风机压力;液压马达驱动风机的播种机,通过调节液压马达转速实现合理风机压力。
 
  (二)试播作业
 
  正式播种前要选择有代表性的地块进行试播。试播作业行进长度以30米左右为宜,根据田块的条件确定适宜的播种速度,检查行距、粒距、播种深度、施肥量、施肥深度是否满足当地农艺要求,有无秸秆拥堵、播种和下肥料管堵塞等异常情况,并以此为依据进一步调整。调整后再进行试播并测试,直至达到作业质量标准和农户要求。作物品种、田块条件有变化应重新试播和调试机具。试播过程中,应注意观察、倾听机器工作状况,发现异常及时解决。
 
  五、规范驾驶作业
 
  (一)注意起步转弯
 
  道路运输、播种过程中地头转弯、倒车时,应将播种单体提升,避免机具损坏。牵引式播种机组长,转弯半径大,倒车操作较复杂,播种前应对机具充分熟悉;作业开始时,应通过机具液压控制系统缓慢降落播种单体。悬挂式播种机组长度小,转弯换向灵活,作业开始时,应通过拖拉机升降装置适时缓慢降下机具。转弯时,应停止播种,将播种单体升起。
 
  (二)保持直线作业
 
  作业时,应尽量保持直线行驶;作业过程中严禁倒车,播完及时升起机具。转弯调头后,对于已安装北斗自动导航驾驶系统的播种机组,应及时开启系统,增加直线度与衔接行一致性;对于未安装的播种机组,应及时放下划行器,确保行距一致性。
 
  (三)合理控制速度
 
  指夹式、气力式排种器有外力主动夹持,受振动颠簸干扰小,排种稳定性较高,能够实现高速播种作业,一般指夹式播种机作业速度控制在6—8 km/h,气力式播种机为8—10 km/h。
 
  (四)保持气压稳定
 
  气力式播种机一般采用手油门控制,保持PTO输出转速稳定。开始作业时,先增加油门,提高转速,一般PTO输出转速维持在540r/min左右,风机压力60—80mbar,再缓慢降下机具开始作业;转弯掉头时,应先提升机具,再降低转速。
 
  (五)关注作业状态
 
  播种作业过程中,应时刻关注作业和监控状态,对声光报警进行正确判断分析;应关注播种机各行单体、施肥开沟器夹草及拥堵情况,发现异常及时停止并排除风险后再正常作业。
 
  (六)及时维护保养
 
  播种作业结束后,应将种箱、肥箱要及时清理干净。应经常检查秸秆处理装置、排种(肥)开沟器等易损部件磨损程度,磨损较大时,应及时更换,避免作业质量降低。
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