保氮素采用先进的保氮缓解技术 ,并添加土质改良剂及农作物所需的多种微量元素。它对改善土壤环境 ,促进作物生长发育具有很好的作用。我们在草甸型土壤、白浆型土壤、灰棕壤、冲积型土壤等土壤不同作物进行了试验、示范 ,取得了良好的效果。其优点有如下四点 :一、提高化肥利 Nitrogen security using advanced nitrogen mitigation techniques, and add soil amendments and crops required for a variety of trace elements. It is to improve the soil environment and promote crop growth and development has a good effect. We have carried out experiments on various types of soils, including meadow soil, white soil, gray brown soil, alluvial soil and so on, and has achieved good results. The advantages of the following four points: First, to increase fertilizer profits