论文部分内容阅读
在果树科学研究中,两种现象的关系往往呈曲线形式,可以认为直线不过是曲线中的一种特殊现象。众所周知,亩产量与种植密度,亩产量与施肥量,以及与修剪量等等在一定范围内随着密度(x)的增加,产量也增加,但是到了极限以后,密度再增加,产量显然会下降,这就是抛物线形式。我们在试验中就是要根据散点图,找出其适合的方程式来。关于各类曲线图形,和抛物线方程即二次多项式,y=a+bx+cx~2,和三次多项式,即y=a+bx+cx~2
In the scientific research of fruit trees, the relationship between the two phenomena is often in the form of a curve. It can be considered that the straight line is only a special phenomenon in the curve. It is well-known that output increases with increasing density (x) within a certain range of mu production and planting density, mu production and fertilization, and so on. However, after the limit is reached, the density will increase again and output will apparently decrease This is the parabola form. We are in the experiment is based on the scatter plot to find the appropriate equation. For all kinds of curves and graphs, and the parabolic equation that is quadratic polynomial, y = a + bx + cx ~ 2, and cubic polynomial, that is, y = a + bx + cx ~ 2