Abstract

This research aimed to find out the best fertilizer type and fertilization methods in local summer maize production. We analyzed the effects of three fertilizer supply ways on photosynthetic characteristics, nitrogen use efficiency and grain yield in summer maize. The results showed that the LAI, SPAD and nitrogen use efficiency of CRF (Controlled release fertilizer was applied as the basal application without top-dressing) were higher than CK (Compound fertilizer was applied as the basal application with urea as top-dressing). The grain yield of CRF was lower than CK and CF (Compound fertilizer was applied as the basal application without top-dressing). Treatment CK needed extra labor cost of topdressing and its process was complicated than CF and CRF. Treatment CF and CRF could simplified the cultivation of the summer maize. Compared with CF, the grain yield of CRF was more stable and the safety factor is higher. Therefore, the controlled release fertilizer had high safety factor and more stable grain yield. And it could improve photosynthetic characteristics and nitrogen use efficiency and effectively simplified the cultivation of the summer maize. The controlled release fertilizer was the best fertilizer type and fertilization methods in local summer maize production.

Keywords:

Controlled release fertilizer, grain yield, nitrogen use efficiency, single fertilization, summer maize,

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