不同配方施肥对榧树生长的影响分析

Effects of different fertilization formulas on the growth of Torreya grandis

榧树是红豆杉科榧树属常绿针叶乔木,是集材用、药用、果用、油用和观赏于一体的多功能珍贵树种,应用价值较大。为了探索榧树幼苗的最佳施肥配比,本研究分别将尿素、过磷酸钙和氯化钾作为氮、磷和钾肥,采用三因素三水平正交试验设计,对2年生榧树幼苗进行试验。结果表明,株高、地径、总根长、根系平均直径、根尖数、叶片可溶性糖含量和可溶性蛋白含量的最优配方为N2P3K3;根表面积、根体积的最优配方为N2P1K3;地上干重、总生物量、叶绿素a含量、叶绿素总含量和类胡萝卜素含量的最优配方为N2P2K3;地下干重、叶绿素b含量的最优配方为N2P2K1。本研究根据不同配方施肥处理对榧树的生长进行正交及方差分析,筛选出适宜榧树幼苗生长的氮磷钾配比,为榧树培育的施肥提供参考。

The Torreya grandis is an evergreen coniferous tree belonging to the family Taxaceae.It is a multifunctional and precious tree species that is used for timber,medicine,fruit,oil,and ornamental purposes.Its application value is significant.In order to explore the optimal fertilization ratio for Torreya grandis seedlings,this study used urea,calcium superphosphate,and potassium chloride as nitrogen,phosphorus,and potassium fertilizers,and conducted experiments on 2-year-old Torreya grandis seedlings using a three factor and three-level orthogonal experimental design.The results showed that the optimal formula for plant height,ground diameter,total root length,average root diameter,number of root tips,soluble sugar content and soluble protein content in leaves was N2P3K3.The optimal formula for root surface area and root volume was N2P1K3.The optimal formula for aboveground dry weight,total biomass,chlorophyll a content,total chlorophyll content,and carotenoid content was N2P2K3,The optimal formula for underground dry weight and chlorophyll b content was N2P2K1.This study conducted orthogonal and variance analysis on the growth of Torreya grandis based on different fertilization treatments,and selected the appropriate nitrogen phosphorus potassium ratio for the growth of Torreya grandis seedlings,providing reference for fertilization in Torreya grandis cultivation.