硝酸还原酶(Nitrate Reductase,简写 NR)是植物体内硝酸盐同化过程中的限速酶,在植物氮代谢中处于关键位置。它对作物的生长发育、产量和品质会产生一定的影响。许多研究表明,硝酸还原酶活力可作为作物的一项营养指标,或者大田的施肥指标,或者作为筛选高蛋白品种和耐肥性品种的一项生化指标。近些年来,在粮食作物和经济作物 Nitrate reductase (NR) is the rate-limiting enzyme in the process of nitrate assimilation in plants. It plays a key role in plant nitrogen metabolism. It has some impact on crop growth, yield and quality. Numerous studies have shown that nitrate reductase activity can be used as a nutritional indicator of crop or field fertilization, or as a biochemical marker for screening high protein varieties and resistant varieties. In recent years, food crops and cash crops