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2014年在湘南红壤丘陵区第四纪红壤旱地,采用田间试验与室内分析相结合的方式,研究磷肥用量与玉米产量、产值的效益关系。结果表明,在肥力中等的红壤旱地种植玉米,施用适量磷肥,可获较高玉米产量与产值,其中化学磷肥(五氧化二磷)施用量为4.0~6.0 kg/667 m~2,玉米产值为300~500元/667 m~2,且磷肥用量并不与玉米籽粒产量呈正相关,超过此范围则产量、产值降低,造成磷肥浪费。
In 2014, in the red soils of red soil in red soil hilly region of Southern Hunan, a field experiment and indoor analysis were combined to study the relationship between the amount of phosphate fertilizer and the yield and output value of maize. The results showed that maize was planted in red soil with medium fertility and the yield and output of maize were higher with suitable amount of phosphate fertilizer. The application rate of chemical phosphorus fertilizer (P2O5) was 4.0 ~ 6.0 kg / 667 m ~ 2, and that of maize was 300 ~ 500yuan / 667m ~ 2, and the amount of phosphate fertilizer did not positively correlated with the grain yield of maize. Exceeding this range, the yield and the output value decreased, resulting in the waste of phosphate fertilizer.