知识课堂：肥大肥二全作物智能营养配方肥，最佳使用时机有哪些？

“特别声明：以上作品内容(包括在内的视频、图片或音频)为凤凰网旗下自媒体平台“大风号”用户上传并发布，本平台仅提供信息存储空间服务。

Notice: The content above (including the videos, pictures and audios if any) is uploaded and posted by the user of Dafeng Hao, which is a social media platform and merely provides information storage space services.”