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杭城要来一“雪”前耻 观景同时更要做好农业防护

2018-01-23 14:05:25 来源:农机网 阅读量:45825 评论

导读:据杭州市气象台预计,2018年1月23日冷空气驾到,大可能性是25日前后杭城会有降雪天气出现。中国天气网8-15天中长期预报显示,“杭州要连下8天雪”。

  【中国农机网 本站原创】据杭州市气象台预计,2018年1月23日冷空气驾到,大可能性是25日前后杭城会有降雪天气出现。中国天气网8-15天中长期预报显示,“杭州要连下8天雪”。
 
  什么?杭州要持续一周的降雪天气?别说是下8天雪,据市气象台统计,从历*看,杭州连续3天以上出现降雪的次数都很少。面对许久不见的大雪,杭州各地也都在紧急部署保障农作物安全过冬,那么风雪天气对农业到底有什么影响,农民又该如何应对呢?

 
  降雪对农业的影响
 
  2018年1月上旬,我国中东部地区出现入冬以来大范围雨雪降温天气过程。总的看,此次降水降温利于冬麦区土壤补墒,缓解部分麦田表墒不足,增强小麦抗寒能力,对小麦安全越冬十分有利,但也造成局部晚播弱苗轻微受冻,局地暴雪易造成设施蔬菜大棚受损
 
  对于宁夏等中南部农牧业地区,此次降雪有利于增加土壤水分,缓解了部分山区早期旱情,对中南部山区春小麦、豆类播种较为有利。此外,降雪有利于促进冬小麦和多年生牧草正常返青。但降雪易造成灌区低洼地地表土壤湿度增加,不利于春播,延长播种期,并易造成日光温室、设施大棚等因积雪增重使棚膜受损或设施倒塌。
 
  综上可以看出,降雪对小麦、土豆等田间农作物来说大有裨益,但是对设施农业造成的危害往往是严重的。1月上旬,渭南市出现一次强降雪天气过程,降雪量大、时间集中,对设施农业影响较大。据初步统计,全市设施农业受灾近40782亩,直接经济损失上亿元。
 
  杭州按照全省现代农业绿色发展和人民生活多元化的需要,着力推进绿色品种选育审定推广,加强绿色产品的供给。其中,大棚蔬菜种植的农业基础设施必不可缺。面对即将到来的风雪天气,菜农要做好万全防护工作,以免措手不及。
 
  面对风雪 设施农业防护工作需全面
 
  ?首先是增强防范意识。今年1月上旬的大雪,对于渭南来说,可谓是十年不遇,虽然气象部门、电视台等媒体多次发布黄色暴雪预警,但都未能引起农户重视;并且对于大棚设施,多数农户也不注重日常维护,例如未及时更换老旧构件、破损棚膜,未配备除雪工具和灾后棚体支撑工具等,防范意识淡薄。在杭州大雪还未到来之前,杭州农户不要抱有侥幸心理,一定要将设施农业的防范工作做到全面。
 
  ?其次是大棚物理防护。在雨雪过程来临前及时加固大棚,以免风雪来临钢架大棚支撑力度不够,压塌大棚;同时还要做好大棚温湿管理工作,当室外温度低时,有温室调控条件的设施,注意适时增温降湿。简易大棚可适当选用覆盖物以增加棚内温度防受冻;若部分地区雨雪量较大,有造成大棚内外积水的可能,因此需提前在大棚四周挖深沟,防止雪水倒渗进棚内,还可以增加棚内湿度,减少蔬菜采收时的损失。
 
  ?后当风雪到来,要及时巡查、清除棚顶积雪,尤其要注意加强夜间除雪,避免积雪过厚压塌棚室,造成损失;另外,雨雪天气造成部分道路运输受阻,难免会影响蔬菜等鲜活农产品的运输,因此做好农产品的保鲜储存工作也非常必要。
 
  还记得上个月的杭城下了一场被众网友嘲笑的“头皮屑”一样的雪吗?相信这次大雪的到来,肯定可以一“雪”前耻。大家在迫不及待想要去西湖看雪的同时,还要做好设施农业的防护,以免雪灾到来猝不及防。
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