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src="../../images/content/2020-08/84bafca0cf334757b8f0fbf39cc9f7fa.jpg" style="height:303px; width:550px" /></p> <p>　　该项技术充分利用玉米植株生长过程中在玉米顶端形成的喇叭口，该喇叭口以心叶为中心，形成天然的“颗粒收集装置”。农药颗粒经植保无人机撒施，投落到玉米植株叶片后，球形的农药颗粒依靠重力自动滚落聚集到喇叭口内，在植保无人机飞行时产生的下压风场作用下，可以到达玉米植株心叶内部，使药剂集中分布在草地贪夜蛾危害部位，实现对草地贪夜蛾的精准打击，在发挥植保无人机高效快速优势的同时，克服了低空低容量喷雾过程中因水分蒸发导致雾滴萎缩变小进而增加飘移的风险。</p> <p>　　此外，为实现颗粒对玉米植株冠层的有效覆盖，项目组将颗粒微?；朔诵∮?毫米球形颗粒难以制造的工艺难题，所制造的球形颗粒直径0.3-0.5毫米，颗粒大小与喷雾雾滴相近，使得颗粒撒施可以达到类似喷雾的覆盖效果，真正实现颗粒代替雾滴。田间试验证明，植保无人机撒施颗粒防治草地贪夜蛾效果明显优于植保无人机喷雾处理。</p> <p>　　该项技术属于国内外首创，引起了国内行业的高度关注。近日，<a target="_blank">植保所</a>与有关生物科技有限公司签署技术开发合作协议，联合研发植保无人机撒施细小颗粒剂的造粒工艺、以及植保无人机撒施细小颗粒剂的施药技术，并开展技术集成、产品登记和大面积应用等工作。（通讯员欧阳灿彬）</p> </div>  <div id="ddvpr3yjlwe" class="article_bottom_btns"> <div id="ddvpr3yjlwe" class="article_btn print fs12 pr" onclick="javascript:window.print()"><i class="iconfont nky-article_print fs24 pa-l"></i>打印本页</div> <div id="ddvpr3yjlwe" class="article_btn close fs12 pr" onclick="window.close();return false;"><i class="iconfont 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