Abstract: 【Objective】 This study is to investigate the effect of planting density and fertilization on the early growth of Paraserianthes falcataria. A density-fertilization cultivation mode was established based on revealing the correlation and regression model between main cultivation factors and individual volume, volume per hm², to reasonably coordinate the technical elements of the varieties, the, site, and the fertilization and provide a theoretical basis for fast-growing and high-yield plantation of P. falcataria. 【Method】 A uniform design combined with randomized complete block design was applied to study on high efficiency cultivation of P. falcataria. With the uniform design U6 (6⁴), both the planting densities and fertilizing levels were analyzed in the trials. The Stepwise analysis was used to select the optimum regression model and determine the main cultivation factors. The Uniform Design Version 3.00 was used to fit stand yield and fertilizer amount regression model. The Rsreg was used to obtain the optimum amount of fertilizer. 【Result】 There were highly significant differences in average height, average diameter at breast height, individual volume and volume per hm²in different trials. Planting density was the most important factor for the growth of P. falcataria, and the optimum planting density was 3 m×3 m by considering gain both better individual volume and better volume per hm². The quadratic regression model between individual volume and fertilizing amount was obtained: Y₃= 6.54E-2+5.29E-8 X₂²+3.47E-5 X₃-4.27E-5 X₄, the multiple correlation coefficient was 0.948 0, with significant correlation. The result showed that the optimal choice was Ca(H₂PO₄)₂·H₂O 274 g + CO(NH₂)₂48 g + compound fertilizer 250 g, and the fertilization through the regression equation could acquire theoretical individual volume and volume per hm²of 0.0604 m³and 47.290 5 m³, respectively, which was 36.3% and 143.7% higher than the lowest one in the trail. The fast-growing character embodied in the early growth of P. falcataria with positive response to different planting density and fertilization, therefore we can better explore the elite and land potential by intensive cultivation method. This study established the best planting density and fertiliz ation combination model of P. falcataria with the uniform experimental design method, and hence could reveal the influence of indicators and regularity, optimize the fitting design precise and high efficiency from the trial times as few as possible.

Key words: Paraserianthes falcataria, planting density, fertilization, individual volume, volume per hm², uniform design