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应用多点联合正交设计，研究了湖南蔗区CP65－357的适宜下种量和N、P、K施用量。结果表明，下种量和施氮量分别是影响甘蔗产量和含糖量的主要和次要因素。增施磷、钾肥效应不明显。文中对有关的试验结果作了单独的和综合的分析，并对较好的因素水平取值范围提出建议。
The multi-point joint orthogonal design was used to study the appropriate planting amount and N, P and K application rates of CP65-357 in Hunan sugarcane field. The results showed that the lower and the lower nitrogen rates were the main and secondary factors affecting the yield and sugar content of sugarcane respectively. Increased phosphorus, potassium effect is not obvious. The paper makes a separate and comprehensive analysis of the related test results, and puts forward some suggestions on the better value range of the factors.