杉木人工林水源涵养功能研究

Water Resources Conservation Function of Chinese Fir Plantation

研究杉木人工林“森林水库”库客的分布和特征。以期加深对“森林水库”理水机理的认识．以裸露地为对照，以福建省杉木人工林地上的“绿色水库”和地下的“土壤水库”为研宛对象，结果表明：杉木人工林林冠层、林下植被层、枯枝落叶层的“库容量”在不同生长阶段分别为幼树阶段0．35mm、0．23mm、0．09mm，速生阶段1．05mm、0．11mm、0．56mm，干材阶段1．67mm、0．42mm、0．82mm，成熟阶段0．51mm、0．83ram、1．25mm．地下“土壤水库”0-40cm的总库客平均为201．23mm，占整个林分总库容量的98％以上，而裸露地为149．56mm，比杉木人工林的小25．6％．维护、改善“土壤水库”的运行和使用，对于“森林水库”功能的充分发挥具有极其重要的作用．

Bare land is taken as CK and ＂Forest Reservoir＂ of Chinese Fir Plantation as study object in order to study the storing and regulating mechanism of ＂forest reservoir＂. The results show that canopy capacity at young-tree stage, fast-growth stage, timber stage and mature stage of Chinese Fir Plantation was 0.35 mm, 1.05 ram, 1.67 ram and 0.51 mm respectively, rising first and descending latter; Undergrowth capacity at the four stages was 0.23 ram,0.11 mm,0.42 mm and 0.83 mm respectively, descending first and rising latter; Forest floors capacity was 0.09 mm,0.56 mm,0.82 mm and 1.25 mm respectively, which rises along with forest age. Mean total capacity of ＂soil reservoir＂ in Chinese Fir Plantation on 0 -40 cm layer was 201.23 ram, accounting for above 98% of total forest capacity, and bare land was 149.56 ram, 25.6% less than that in Chinese Fir Plantation. It is most important for ＂Forest Reservoir＂ to maintain and improve ＂soil reservoir＂ function.