文章翻译：

植被组成

模型中的植被表面由多达15种可能的植物功能类型（PFTs）加上裸地组成。如果激活灌溉或作物模型，还会添加额外的PFTs。

PFTs在影响植物与环境相互作用的多个参数上有所不同，包括：
- 叶片和茎的光学特性，这些特性决定辐射相互作用
- 根系分布参数，控制从土壤中吸收水分
- 空气动力学参数，影响热量、湿度和动量传递
- 光合作用参数，决定气孔阻力、光合作用和蒸腾作用

网格单元内PFTs的组成和丰度可以被设定为时间不变的场，或者如果模型在瞬态土地覆盖模式下运行，则可以动态演化。

提供的表格列出了15个基础PFTs、它们的缩写以及它们在表面数据集中对应的IVT（植被类型指数）值。如果激活灌溉或作物模型，还会添加额外的PFTs。

原文格式保留：

Vegetation Composition

The vegetated surfaces in the model are composed of up to 15 possible plant functional types (PFTs) plus bare ground. Additional PFTs are added if the irrigation or crop models are active.

The PFTs differ in various parameters that affect the plant's interaction with the environment, such as:
- Leaf and stem optical properties that determine radiation interactions
- Root distribution parameters that control water uptake from the soil
- Aerodynamic parameters that affect heat, moisture, and momentum transfer
- Photosynthetic parameters that determine stomatal resistance, photosynthesis, and transpiration

The composition and abundance of PFTs within a grid cell can be either prescribed as time-invariant fields or can evolve dynamically if the model is run in transient land cover mode.

The table provided lists the 15 base PFTs, their acronyms, and their corresponding IVT (index of vegetation type) values in the surface dataset. Additional PFTs are added if the irrigation or crop models are active.