The minimum sample area of the herb stratum is mainly affected by s but those of the tree and shrub stratum are mainly affected by J.
草本层最小取样面积动态主要受s的影响,而乔、灌木层的最小取样面积变化则与J紧密相关。
The sample was extracted by methanol after crushing and picking-up oil. The clear liquid was separated by FID and quantified by the ratio of sample area between standard sample area.