福建农林大学学报（自然科学版）2016，Vol.45Issue(4)：398-404,7.DOI:10.13323/j.cnki.j.fafu(nat.sci.).2016.04.006
天宝岩不同类型长苞铁杉林枯落物持水特性
Water-holding characteristics of litter in different types of Tsuga longibracteata forests in Tianbaoyan National Nature Reserve
摘要
Abstract
Forest litter plays a central role in water inception, nutrient cycling and soil conservation. To elucidate the regeneration problem of Tsuga longibracteata seedling, a preliminary study on water-holding characteristics of litter in 4 types of T.longibracteata-based mixed forests was carried out in Tianbaoyan National Nature Reserve. Results showed that average litter thickness ranged from 19 to 34 mm, and storage capacity varied between 11.91 and 34.42 t��hm-2 , with the thickest litter and largest storage capacity be-ing in forest that dominated by mix forest of T.longibracteata and Rhododendron simiarum hance. Variations in water-holding capaci-ty, water absorption rate and immersion time of litter were basically similar among 4 forest types, which was that water-holding ca-pacity of litter peaked 6 hours after immersion and after that absorption rate slowed down. Maximum water-holding rate, water-hold-ing capacity, interception capacity and modified interception capacity of litter in 4 forest types approximated at 149.94%~223.47%, 11.91~34.42 t��hm-2 , 15.32~48.84 t��hm-2 and 8.38~18.43 t��hm-2 , respectively. Water-holding capacity of litter had a visible logarithmic correlation with immersion time (R2>0.96), and there existed a significant power function relationship between water absorption rate and immersion time ( R2>0.99) .关键词
天宝岩国家级自然保护区/长苞铁杉/枯落物/持水特性/物种多样性Key words
Tianbaoyan National Nature Reserve/Tsuga longibracteata/litter/water-holding characteristics/species diversity分类
农业科技引用本文复制引用
肖石红,游惠明,何东进,朱乃新,简立燕,吴建勤,刘进山,詹仕华,胡哲森,游秀花..天宝岩不同类型长苞铁杉林枯落物持水特性[J].福建农林大学学报（自然科学版）,2016,45(4):398-404,7.基金项目
国家自然科学基金项目(31370624)；国家教育部博士学科点基金项目(20103515110005)；福建省自然科学基金项目(2008J0116、2011J01071) （31370624）
