叶幕代表植物的同化面积并决定其光合干物质的累积量。以往有数种方法用于测定苹果叶面积,如扫描式求积仪法、鲜叶重测定法以及叶长×宽等。根据叶长×宽与叶面积之间存在若一定的线性关系,许多学者又提出了不同的矫正系数。但是这些方法或公式泛指所有苹果品种,而未考虑到品种 The leaf curtain represents the plant assimilation area and determines the accumulation of photosynthetic dry matter. In the past there are several ways for the determination of apple leaf area, such as scanning plotimeter, fresh leaf weight determination and leaf length × width and so on. According to the existence of a certain linear relationship between leaf length × width and leaf area, many scholars have proposed different correction coefficients. However, these methods or formulas refer to all apple varieties without regard to the variety