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应用正交试验设计法，就N、P、K 3 类肥料对 2 次结实板栗生长发育及其结实的影响作了试验和分析，筛选出了不同生长发育阶段、不同定向培育目标最佳施肥组合及其在该组合下的增产等综合作用效应。
The effects of N, P, and K fertilizers on the growth and fruiting of 2-stage chestnut were tested and analyzed by orthogonal test design method. The optimum fertilization combinations for different directional cultivation objectives were screened at different stages of growth and development And its combined effect of increasing production and other comprehensive effects.