台湾水土保持特殊地优势植物需水量预测

The Prediction on Water Consumption of Dominant Plants in Special Soil and Water Conservation Area in Taiwan

摘要:

将利用大气环流模式(GCM), 模拟在气候变迁的情况下, 研究台湾西南部泥岩优势植物需水量的改变以及变化趋势。结果表明, 气候变迁后莿竹(Bambusa stenostachya)、大叶桃花心木(Swietenia macrophylla)及铁刀木(Cassia siamea)的需水量明显增加, 且莿竹的年需水量大于另两种植物。对土壤水资源缺乏的干旱泥岩地区而言, 莿竹林地对该区的植物需水量将造成更大的影响, 也突显莿竹林地更新的重要性。

Abstract:

The impacts of climate change on water consumption of dominant plants were evaluated in the mudstone area in southwestern Taiwan by using General Circulation Model. The results showed that the water consumption of the three dominant plants, eg. Bambusa stenostachya, Swietenia macrophylla and Cassia siamea, in the mudstone area increased significantly under simulated climate change. The Thorny bamboo (B. stenostachya) consumed more water than Honduras mahogany (S. macrophylla) and Siamese senna (C. siamea). Obviously, Thorny bamboo has important impact for soil water resources in the mudstone area during drought period.