氮磷钾配比施肥对桢楠幼苗生长及生物量积累的影响

Effects of N,P,K formula fertilization on growth and biomass accumulation of Phoebe zhennan seedlings

采用3因素3水平正交试验设计,研究了N、P、K 3种大量元素配方施肥对1 a桢楠幼苗生长和生物量积累的影响,为桢楠苗期的科学施肥提供参考。结果表明,不同施肥处理对桢楠幼苗苗高、地径和各器官生物量的影响差异均显著,其中N_(2)P_(3)K_(1)组合(尿素2 g·株^(-1)、过磷酸钙8 g·株^(-1),氯化钾0 g·株^(-1))条件下植株苗高、地径及各器官生物量均处于最高水平,该组合植株生长表现最佳。N、P、K对桢楠幼苗生长和生物量积累的影响效应不同,主次顺序均表现为N>P>K,其中N元素影响最大,P元素和K元素影响较小。

The effects of N,P and K formula fertilization on the growth and biomass of Phoebe Zhennan seedlings were studied by using three factors and three levels orthogonal design experiment,so as to provide reference for scientific fertilization of Ph.Zhennan seedlings.The results showed that the effects of different fertilization combinations on plant height,basal diameter and organ biomass of Ph.Zhennan seedlings were significant.The plant height,ground diameter and organ biomass of N_(2)P_(3)K_(1) combination(urea 2 g per plant,calcium superphosphate 8 g per plant,potassium chloride 0 g per plant)were at the highest level,and the plant growth performance of which was the best.The effects of N,P and K on the growth and biomass accumulation of Ph.Zhennan seedlings was in range N>P>K,of which N was the most important factor,and P and K were less affected.