一、高效化。为了减少包装运输及施用方面的费用和节约劳动力，近年来，高浓度化肥的生产和施用明显增加，逐渐替代了一部分低浓度肥料。化肥浓度提高，同时体积也相对减少，因此便于运输、使用、保管和贮藏。二、长效化。长效肥料也DJI缓效或缓释放肥料。主要是控制氮肥的溶解 First, efficient. In recent years, the production and application of high-concentration fertilizers have been significantly increased in order to reduce the costs for packaging, transportation and application as well as labor savings. As a result, some low-concentration fertilizers have been gradually replaced. Fertilizer concentration increases, while the volume is relatively reduced, so easy to transport, use, storage and storage. Second, long-term. Long-acting fertilizer also DJI slow release or release fertilizer. Mainly to control the dissolution of nitrogen fertilizer