种内竞争对一年生植物高生长与生物量关系的影响

通过田间试验研究了两种一年生植物燕麦和箭She豌豆在高密度和低密度条件下表现出来的株高（H）与生物量（M）之间的异速生长关系，并用线性回归和非线性回归的方法对所得数据进行了分析，结果表明，植物在低密度条件下，个体间没有明显的竞争作用存在，株高与生物量之间表现为“简单的异速生长”关系，其异速生长表达式为y=a bx的形式；植物在高密度条件下，个体间存在着激烈的种内竞争，株高与生物量之间表现为“非线性的异速生长”关系，其异速生长表达式为y=ax^2 bx c的形式。

The effects of intraspecific competition on the relationship between height growth and biomass of annual plants

In this paper, with field experiments the allometry relationship between plant height(H) and biomass(M) of annual plants, Avena sativa and Vicia sativa, under low density and high density, were investigated, and the data obtained from experiments were analysed with the linear and nonlinear regression. The results of experiments and analyses are as follows: under low density, there is no notable competition between individual plants, the function relation between height and biomass shows a "simple allometry" and form of its allometric equation is y=a bx; under high density, there is strong intraspesific competition, the relationship between height and biomass is "nonlinear allometry" and its allometric function can be expressed as y=ax 2 bx c.