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以丹东地区主栽品种丹大17为试验材料,采用二次回归旋转组合设计,研究钾肥施用量与施用方式的不同组合对丹大17光合性能的影响,筛选最佳组合方式,为实现经济施肥、降低生产成本提供依据。结果表明,硫酸钾作基肥的施用量为205.5～217.5 kg/hm2,追肥的施用量为60～85.5 kg/hm2,在此施肥水平下丹大17的各项光合性能指标表现最佳。
Taking Danda 17, a major cultivar in Dandong, as the experimental material, the quadratic regression rotation combination design was used to study the effects of different combinations of K application rates and application methods on the photosynthetic characteristics of Dan-Da 17 and to screen the optimal combinations. In order to achieve economic fertilization , Reduce production costs to provide the basis. The results showed that the application of potassium sulfate as basal fertilizer was 205.5-217.5 kg / hm2, and the top dressing application was 60-85.5 kg / hm2. Under this fertilization level, the photosynthetic performance of Dan-17 was the best.