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化肥农药危害大,减量提效势在必行

2018-03-21 15:51:56 来源:中国农机网 阅读量:26645 评论

导读:从“十三五”开始,农业部大力开展化肥农药使用量零增长行动以来,我国的化肥、农药使用总量均已呈现下降趋势,提前实现了到2020年化肥、农药使用量零增长的目标。但在取得成绩的同时还要认识到,我国化肥农药总体使用量还是很庞大的,如何进一步推进化肥农药减量增效、实现绿色兴农是当前面临的主要问题。

  【中国农机网 本站原创】 从“十三五”开始,农业部大力开展化肥农药使用量零增长行动以来,我国的化肥、农药使用总量均已呈现下降趋势,提前实现了到2020年化肥、农药使用量零增长的目标。但在取得成绩的同时还要认识到,我国化肥农药总体使用量还是很庞大的,如何进一步推进化肥农药减量增效、实现绿色兴农是当前面临的主要问题。
 
  多措并举,提高化肥农药利用率
 
 
  据了解,2017年我国水稻、玉米、小麦三大粮食作物化肥利用率为37.8%,农药利用率为38.8%,而美国粮食作物氮肥利用率大体在50%,欧洲粮食作物氮肥利用率大体在65%;欧美发达国家小麦、玉米等粮食作物的农药利用率在50%至60%。可见我国农药化肥利用率与发达国家相比还存在一定差距。据测算,化肥利用率提高2.6个百分点,相当于减少尿素用量130万吨(实物量),减少生产投入约26亿元;减少的化肥投入相当于减少氮排放近60万吨、节省130万吨燃煤或90万立方米天然气。农药利用率提高2.2个百分点,相当于减少农药使用量3万吨(实物量),减少生产投入约12亿元。提高化肥农药利用率,不仅节约生产成本,节能减排实现绿色兴农,对我国整体环境保护也会起到很大作用。如何来提高化肥农药利用率?
 
  加力推进集成创新,重点推广化肥机械深施、机械追肥、种肥同播、水肥一体化等技术;积极推广先进施肥施药机械,加快替代落后机械。如水稻插秧同步精量施肥机的推广使用,将肥料定量、定点、定时地深施到秧苗一侧的泥土里,实现施肥,肥料不会随水流失,可大幅减少肥料对水体的污染;同时可搭载在插秧机上实现施肥与插秧同步作业,节本省工,提高化肥利用率效果非常明显。
 
  另外,推广应用农业防治、生物防治、物理防治等绿色防控技术,推进统防统治与绿色防控融合;同时加大新型肥料、农药的研发力度,重点研发缓释肥料、低毒低残留农药、生物肥料、生物农药等新型产品也是提高化肥农药利用率的重要举措。
 
  政策助力,倡导农业主体节本增效
 
 
  过去,不少农村的种植地里出现这样的一幕幕——由于缺乏环保意识和科学用药用肥意识,一些农民不按规定使用农药量和化肥量,使用过的农药瓶子乱丢乱放……由于很多农民对化肥农药过度使用的危害认识不到位,因此政府加大对化肥农药科学用量的宣传是*的,让农业生产主体自发减少化肥农药使用量,指导家庭农场、合作社、带头减化肥、减农药,从源头减轻农业面源污染;在全国建立一批不同类型的化肥、农药减量增效示范区,充分发挥其、示范和*作用;同时政府加大补贴力度,出台相关支农惠农政策,在政策方面对农民予以支持。
 
  长期、大量使用化肥农药,不仅会对农产品产生有毒有害物质残留、对人体健康产生危害;同时还会使土壤养分失衡、土壤肥力和有机质下降,导致耕地土壤酸化、土壤流失,严重会导致土壤板结,终丧失农业耕种价值。因此,倡导科学用量,全面加快推进化肥农药使用的减量化,践行实施乡村振兴战略提出的“加强农业面源污染防治,开展农业绿色发展行动,实现投入品减量化、生产清洁化、废弃物资源化、产业模式生态化”势在必行。
 
  资料来源:经济日报
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