一、水的生态意义: 水是建造植物体的主要原料——氢的来源,又是构成植物体的无机成分之一。从活细胞的原生质,到林木种子都含有不同量的水分。树木的生命活动要在有水分的条件下才能进行。水是植物体从环境中摄取营养物质的唯一溶剂,又是植物体内物质运输的载体和动力。水可以使树木的一些组织保持膨胀状态,使一些器官保持一定的形状和功能,还可以通过蒸腾使树木的温度状况得到调节。如果树木失去了过多的水分,就会使它的生理机能受到抑制而产生萎蔫、甚至死亡。水也是植物繁殖、种子迁移的动力,许多 First, the ecological significance of water: Water is the main raw material for building plants - the source of hydrogen, but also constitute one of the inorganic components of plants. From the living cells of the protoplasm to the forest seed contains different amounts of water. The life activities of trees should be carried out under the condition of moisture. Water is the only solvent that plants use to ingest nutrients from the environment and is the vehicle and engine of material transport in plants. Water can keep some of the tree’s tissue expanded, allowing some organs to retain some shape and function, and can also regulate the temperature of trees through transpiration. If the tree loses too much water, it will inhibit its physiological function and produce wilting, or even death. Water is also a plant breeding, seed driving force, many