【摘要】 为了研究3年生油茶低产林幼林的最佳磷肥施肥量,进行了磷肥施用量与油茶树高、冠幅生长的回归试验。结果表明:油茶低产林幼林树高、冠幅生长与磷肥施用量之间的关系均符合一元二次抛物线方程,反应曲线为典型凸形抛物线,即树高和冠幅生长指标均存在1个峰值。峰值以前,树高和冠幅生长量随着磷肥施用量的增加而上升;峰值以后,树高和冠幅生长量随着磷肥施用量的增加而下降。根据回归模型方程式求解,得到树高、冠幅生长量最大时对应的磷肥施用量分别为0.118 3、0.126 2 kg,对应的最高理论树高、冠幅分别为108.87、385.44 cm,分别较对照提高了18.87%、119.62%。更多还原

【Abstract】 In order to study the optimal amount of phosphate fertilizer applied to the 3-year old low-yield Camellia oleifera, the regression between phosphate fertilizer and the growth of C. oleifera height and crown width was studied. The results showed that the relationship between tree height, canopy width growth and the amount of phosphate fertilizer applied in C. oleifera low-yield forest conformed to the quadratic parabola equation of one variable, which was in typical convex curve, there was a peak in both tree height and canopy width. Before the peak, tree height and crown width increased with the increase of phosphate fertilizer. After the peak, tree height and crown width decreased with the increase of phosphate fertilizer application. According to solving the regression model equation, the corresponding phosphate fertilizer amount were 0.118 3 and 0.126 2 kg, respectively, when the maximum growth amount of tree height and canopy width were obtained, and the corresponding maximum theoretical tree height and canopy width were 108.87, 385.44 cm, respectively, which were 18.87% and 119.62% higher than the control.更多还原