两个杂交水稻品种氮肥利用效率的初步研究

Preliminary Study on Apparent Recovery Efficiency of Applied N for Two Hybrid Rice

以湖北农业科学院选育的两个水稻品种培两优986和培两优3076为材料,研究了其在中氮和较高氮水平下的氮肥利用率和农学效率。结果表明,在中氮水平下,两个品种的氮肥利用率都相对较高,达27%;而在较高氮水平下,两个品种的氮肥利用率都比较低;在两个供氮水平之间氮肥农学效率培两优986没有差异,而培两优3076则差异明显。

This paper studied the N apparent recovery efficiency and N agronomic efficiency of medium hybrid rice Peil-iangyou 3076 and Peiliangyou 986. The N apparent recovery effieieneies of both cultivars at medium N supply level were higher than that at high N supply level. At medium N supply level, the N apparent recovery efficiency of them was about 27%. There was no difference in N agronomic efficiency of Peiliangyou 986 between high and medium N supply levels, however obviously differences existed in Peiliangyou 3076 between the two N supply levels.