合理施肥是实现作物高产稳产、降低成本、防止污染环境的重要措施。随着农业的发展,氮肥的施用量将日益增加,但是氮肥的利用率据国内外试验只有30—50%,约有一半受到损失,为了提高氮肥利用率,我们应用~(15)N 示踪技术,对氮肥在土壤中转化、防止损失措施、收支平衡以及土壤供氮力(A_N 值)等进行了探讨。 Rational fertilization is an important measure to achieve high and stable crop yield, reduce costs and prevent environmental pollution. With the development of agriculture, the application amount of nitrogen fertilizer will increase day by day. However, the utilization rate of nitrogen fertilizer is only 30-50% at home and abroad, about half of which is lost. In order to improve the utilization rate of nitrogen fertilizer, we use ~ (15) N tracer Technology, the transformation of nitrogen in the soil, to prevent loss measures, balance of payments and soil nitrogen supply (A_N value) were discussed.