关键词: 水稻, 氮, 磷, 品种筛选

Abstract:

In order to select high yield rice cultivars for under lower nitrogen and phosphorus application, 12 hybrid varieties bred by Guizhou Rice Research Institute in recent years were used as materials, with Fyou 498 and Yixiangyou 2115 under normal fertilization conditions as control, different nitrogen reduction treatments and phosphorus reduction treatments were carried out. The results showed that the yields of Chengyou 981, Chengyou 33, Shanyou 108, D44/QR35 and Chengyou 489 under the decreased nitrogen condition were higher than the CK, the average yield was increased by 3.97%, that means the five cultivars could obtain high yield with lower nitrogen application. Shanyou108 and D44/QR35 performed higher yields under lower phosphorus application compared with the CK, the average yield was increased by 3.20%, that means the two cultivars could obtain high yield with lower phosphorus application. Generally, the type of rice cultivars with high yield under lower fertilizer application had more spikelets per panicle and larger population spikelets.

Key words: rice, nitrogen, phosphorus, variety screening