关键词: 氮, 磷, 钾, 干物质积累量, 养分吸收量, 产量

Abstract:

The effects of different nitrogen, phosphorus and potassium levels on dry matter accumulation, nutrient uptake and yield of rice were studied, with super hybrid rice Q you 6 as materials. The results showed that the yield, effective panicles and spikelets per panicle increased gradually with the increase of fertilizer-N application, while seed setting rate decreased; leaf area index（LAI） and dry matter accumulation were at the highest level under maximum value of fertilizer-N application. The yield, effective panicles and 1000-grain weight were slightly increased with the application of fertilizer-P increased, while LAI increased at first and then decreased at every growth stage, and dry matter accumulation increased gradually at jointing stage. The yield and LAI increased gradually with the increment of K rates, while dry matter accumulation increased first and then decreased. As the application of nitrogen, phosphorus and potassium fertilizer improved, total nutrient uptake of rice and demand of grain nutrients per 100 kg increased, while nutrient harvest index, nutrient recovery efficiency and agronomic efficiency showed a decreasing trend.

Key words: N fertilizer, P fertilizer, K fertilizer, dry matter accumulation, nutrient uptake, yield