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在成都市新都区灰色潮土上采用完全设计和正交设计方法,进行中华红叶杨幼林施肥试验。结果表明:单一养分元素肥料施用效果K>N>P,肥料配合施用效果N+P+K>N+K>N+P、P+K,适宜的施肥配方为尿素150 g/株+过磷酸钙220 g/株+硫酸钾75 g/株。
The complete design and orthogonal design method were used on the gray tide soil in the Xindu District of Chengdu City to test the fertilization experiment of the young Chinese red leaf and poplar young plantation. The results showed that the optimum fertilization formula was urea 150 g / plant + superphosphate (K + N + P), N + P + K> N + K> Calcium 220 g / plant + potassium sulfate 75 g / plant.