比叶重(Specific Leaf Weight, SLW）是指单位叶面积的叶片重量（干重或鲜重），不过通常用干重来表示。
比叶重和含氮量与净同化速率间存在正相关。
Specific leaf weight and nitrogen content had positive relation to the net assimilation rate.
施用有机肥对叶片的影响表现为提高叶绿素含量，增加比叶重。
The investigation on properties of leaves indicated that the content of chlorophyll rose and specific leaf weight increased after fertilizing.
叶绿素含量与净同化速率间没有显著关系，但与含氮量和比叶重有关。
Chlorophyll content had no significant relation with the net assimilation rate, but was related to the nitrogen content and the specific leaf weight.
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