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辽宁省农业农村厅关于印发《设施农业灾后恢复生产技术指导意见》的通知

2021-11-18 09:16:44 来源:辽宁省农业农村厅 阅读量:15293 评论

导读:11月7-9日,我省出现历史罕见特大暴雪、雨雪冰冻、寒潮天气,最大降雪量80.3毫米,此次暴雪天气被评估为一级暴雪灾害,对设施农业造成不利影响。

  【农机网 通知公告】 各市农业农村局:
 
  11月7-9日,我省出现历史罕见特大暴雪、雨雪冰冻、寒潮天气,最大降雪量80.3毫米,此次暴雪天气被评估为一级暴雪灾害,对设施农业造成不利影响。为做好灾后恢复生产,省农业农村厅组织沈阳农业大学、省现代农业工程中心、省农科院专家制定了《设施农业灾后恢复生产技术指导意见》,现印发给你们,请结合当地实际,因地制宜指导做好灾后恢复生产工作。
 
  辽宁省农业农村厅
 
  2021年11月11日
 
设施农业灾后恢复生产技术指导意见
 
  受东北冷涡及地面气旋强烈发展影响,11月7日至9日我省出现历史罕见特大暴雪、雨雪冰冻、寒潮天气,极端天气过程强度大、时间长、范围广、危害重,对我省设施农业生产和“菜篮子”产品保供造成不利影响。为做好设施农业灾后恢复生产,提出如下技术指导意见。
 
  一、及早安全清除积雪
 
  各地要组织指导棚户、设施农业园区企业迅速清除棚室上面积雪。清除积雪时务必以确保作业人员安全为前提,特别是需要攀上棚顶踩踏棚架除雪的,必须事先采取棚内支柱加固等措施,避免发生坍塌,造成人员伤害。要加大除雪机具调度,组织力量尽快清运设施棚区四周和主要通路的积雪,要清净、清远,以防积雪融化导致棚室四周积水、淤湿现象,确保田管作业和棚菜运输车辆的正常通行。
 
  二、尽快修复受损棚室
 
  暴雪灾害主要导致棚室棚架坍塌、受损。各地要尽快组织力量,对受损骨架、棚膜、墙体裂缝部位进行修复,对温室中柱等薄弱部位进行加固。对钢铁骨架受损明显的,原则上要重新制作。同时,要对棚内外电路及卷帘机、放风、照明、补光等用电机具设备全面仔细检查、检修,有故障要及时修缮排除。对老旧棚室,尤其要注意隐患排查。各地要力争用最短的时间修复棚室,及早恢复正常生产。这次提早到来的极端天气过程,为尚未迎来隆冬的日光温室蔬菜生产敲响了警钟,经营者要提高棚室修复标准,按标准设计施工,进一步加固设施设备,以防再次遭遇灾害性天气而受损。
 
  三、强化天气放晴初期管理
 
  这次连续阴雪天气时间长,保温覆盖时间较长,因此天气骤晴后要注意采取间隔、交替揭开日光温室保温覆盖物或逐渐打开保温覆盖物的方式,不能立即全部揭开保温覆盖物,以防作物叶片在强光下失水萎蔫。若揭开保温覆盖物后发现叶片萎蔫应随即回盖保温覆盖物,待植株恢复后再逐步揭开,同时及时恢复通风排湿。一般1~2天后可回归正常管理。待植株适应后,叶面适当喷施0.2%磷酸二氢钾+0.3%尿素+0.3%氨基酸(或食用米醋)类叶面肥。
 
  四、加强雪后日常田间管理
 
  雪后恢复正常管理后,要重点做好日光温室蓄热保温、光照、作物肥水、通风降湿等管理工作。
 
  一是要加强日光温室蓄热保温管理。暴雪后,常常伴随急剧降温,除了维护和加强日光温室保温覆盖外,在进出门设棉门帘、内外增设简易缓冲间或围挡,密闭温室缝隙,前底脚围“裙帘”,温室内张挂二道幕等等,全面提高日光温室的蓄热保温抗寒能力。条件允许的,要预备燃热块、燃油或燃煤热风炉、移动式电热风机、各种取暖器等应急加热设备。
 
  二是要加强日光温室光照管理。在温度允许情况下要尽量早揭和晚盖日光温室保温覆盖物,延长光照时间。揭保温覆盖物时间应以揭开保温覆盖物后温室内温度不下降为宜;同时要适时盖保温覆盖物,保温性能好的日光温室,外界夜间最低气温在0~-15℃季节应在日光温室内温度降至15~17℃时盖保温覆盖物;夜间最低气温在-15℃以下季节应在日光温室内温度降至17~19℃时盖保温覆盖物;保温不良的日光温室应更早盖保温覆盖物。及时清洁棚膜,重点在温室的前立窗。
 
  三是要加强肥水科学管理。冬季要严格日光温室蔬菜肥水管理,在最低气温-15℃以下的季节,一般尽量少浇水。应在最低气温-10℃以上季节选择晴天浇透水,覆盖地膜保墒。如果蔬菜表现缺水,应选寒流刚过天气晴朗的好天,采用膜下滴灌或膜下浇小水,以免降低地温。出现阴雪天气时,日光温室内地气温均较低,蔬菜根系吸收能力弱且生长发育缓慢,应尽量少进行土壤追肥,但可适当进行叶面追肥,以缓解由于低温寡照导致蔬菜生长发育不良。
 
  四是要强化控湿防病。出现持续阴雪低温天气时,日光温室内空气湿度大,易诱发病害,应在中午短时间通风排湿,控制病害发生;特别注意室内15~25℃温度范围空气相对湿度控制在90%以下;发病后宜选用烟雾剂、粉尘剂防治,以利于均匀施药和避免温室内空气湿度过高。此外,在温室内垄沟中,尽可能铺垫玉米与稻麦碎秸秆、稻壳、锯末等吸湿物料,降低温室内湿度。
 
  五是要采取增加地温促根壮秧措施。若日光温室尚处在耕整土地和定植阶段,要注重增加地温。一般采用增施有机肥及有机物料、宽行栽培、高畦大垄、地膜覆盖、垄沟铺设有机物料(锯末、稻壳、碎秸秆)、膜下滴灌、定植前浇水造墒后再定植秧苗,推荐定植秧苗前进行杀菌杀虫药剂沾根。
 
  六是要控制温室早晨揭保温被(草苫)后气温提升速度。早晨揭保温被后控制气温快速上升,见温室内气温开始上升要开细小放风口,控制每小时增温速度尽量不超过4℃。要坚持早放风,放细小风。一旦出现棚室温度过高,不可立刻加大放风口快速放风,要慢速回到正常温度。晚上放保温被前先防风10~15分钟后再放下保温被,并尽量延晚放下保温被。
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