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在田间肥料试验的基础上,应用肥料效应函数,研究确定南亚热带气候条件下甘蔗最高产量及最大经济效益的施肥量,并进行施肥经济效益分析。结果表明,甘蔗最佳施氮量为337.6～351.0kg/ha;氮磷肥最佳配比为289.1～309.2,147.1～187.2kg/ha(N,P_2O_5);氮钾肥最佳配比为258.0～267.5,135.5～139.8kg/ha(N,K_2O)。在这种施肥量与配合量下,经济效益最高。
Based on the field fertilizer experiment, the fertilizer effect function was used to study the fertilization amount to determine the highest output and the maximum economic benefit of sugarcane in the south subtropical climate and to analyze the economic benefits of fertilization. The results showed that the optimal nitrogen application rate was 337.6 ~ 351.0kg / ha for sugarcane, 289.1-309.2 and 147.1 ~ 187.2kg / ha (N, P_2O_5) for nitrogen and phosphorus, and the best ratio of nitrogen and potassium was 258.0 ~ 267.5 , 135.5 ~ 139.8kg / ha (N, K_2O). In this amount of fertilizer and the amount of cooperation, the highest economic benefits.