对话｜刘永刚博士：微量元素与农牧业可持续发展，我的忧虑与思考

<span><br></span><p style="color:#333333;font-weight:normal;font-size:16px;line-height:30px;font-family:Helvetica, Arial, sans-serif;hyphens:auto;text-align:justify;" data-flag="normal"><img data-key="0" src="http://imagev2.xmcdn.com/storages/2058-audiofreehighqps/0C/B3/GKwRIaIKGDHQAAytCgLS64nZ.png!op_type=4&amp;device_type=ios&amp;upload_type=attachment&amp;name=mobile_large" alt="" data-origin="http://imagev2.xmcdn.com/storages/2058-audiofreehighqps/0C/B3/GKwRIaIKGDHQAAytCgLS64nZ.png?op_type=0" data-large="http://imagev2.xmcdn.com/storages/2058-audiofreehighqps/0C/B3/GKwRIaIKGDHQAAytCgLS64nZ.png!op_type=4&amp;device_type=ios&amp;upload_type=attachment&amp;name=mobile_large" data-large-width="750" data-large-height="421.875" data-preview="http://imagev2.xmcdn.com/storages/2058-audiofreehighqps/0C/B3/GKwRIaIKGDHQAAytCgLS64nZ.png!op_type=4&amp;device_type=ios&amp;upload_type=attachment&amp;name=mobile_small" data-preview-width="140" data-preview-height="78.75"><br></p><blockquote style=...