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采用“3414”试验设计研究了坡岗地木薯氮磷钾养分用量优化。结果表明,坡岗地木薯以氮素投入最重要,随着氮素的增加叶绿素含量提高,株高、茎基部粗度以及产量增加显著;钾素对产量的贡献大于磷素。回归分析表明,每667m2施用氮磷钾肥含量分别为22.8、7.0和28.1kg时木薯产量最高,考虑经济效益和生产实际,建议每667m2施用氮、磷、钾肥的用量为16～20、5～7和15～20kg较适宜。
The experiment of “3414” was used to study the optimization of nitrogen, phosphorus and potassium nutrient in hillside cassava. The results showed that the nitrogen input was the most important factor in the cassava cassava field. The chlorophyll content increased with the increase of nitrogen and the plant height, stem base roughness and yield increased significantly. The contribution of potassium to phosphorus production was greater than that of phosphorus. Regression analysis showed that the yield of N, P and K was 22.8, 7.0 and 28.1 kg per 667m2, respectively. Considering the economic benefits and actual production, it was suggested that N, P and K fertilizer application rate should be 16-20, 5-7 per 667m2 And 15 ~ 20kg more appropriate.