关键词: 生物产量, 生物产量

Abstract:

Provide a scientific basis to the super rice and reasonable application of N,P,K fertilizer，‘Liangyou 293’ was used as material to study the effects of different fertilization levels of nitrogen, phosphorus, potassium on super rice yield and fertilizer utilization. The results showed that: the effect of super rice yield and fertilizer utilization was the best under different nitrogen levels, and this effect was followed by the potassium level, and finally the level of phosphorus. Combination of reasonable fertilizer N, P, K were maximum to increase super rice yield which was the highest yield and the maximum of fertilizer recovery efficiency and agronomic efficiency under N 270 kg/hm2, P2O5 150 kg/hm2, K2O 270 kg/hm2. Combination of reasonable fertilizer N, P, K on super rice yield contribution increased the fertilizer use efficiency, effective panicles, grain number per panicle, ripening rate.