滇南亞熱帶地區(qū)典型公益林與商品林凋落物儲量及持水特性
[Abstract]:In order to study the hydrological and ecological effects of litterfall of public welfare forest in the subtropical region of southern Yunnan, Taking 7 typical public welfare forests of Pu'er city, A0 evergreen broadleaved forest (A0 evergreen broad-leaved forest), A _ 1 (Pinus kesiya) pure forest, A _ (2) A _ (2) A _ (2) A _ (3) Quercus mixed Quercus (2:8) A4 yellow bamboo forest, (Dendrocalamus membranceus) (A5) shrub forest, as the research object, the same type of commercial forest was studied. In addition, compared with rubber forest (Rubber plantation) and eucalyptus forest (Eucalyptus robusta), through field investigation, indoor soaking method was used to quantitatively study its litter reserves, water holding capacity, rainfall interception performance and so on. The results showed that: (1) in the public welfare forest, The litter storage of pure Pinus simaoensis forest was (21.30 鹵2.10) t hm~ (-2), and that of evergreen broadleaved forest was (12.47 鹵1.31) t hm~ (-2), and that of commercial forest was (14.30 鹵2.41) t hm~ (-2) and (2.83 鹵0.12) t hm~ (-2). (2). The water holding capacity of evergreen broadleaved forest was the largest (0.841mm), and the shrub forest was the smallest (0.449 mm); commercial forest). The moisture capacity of litter in Hevea was the largest (0.795 mm),) and the smallest (0.505 mm).) in Simao pine pure forest. The general trend was that the litter water capacity of broadleaved species was greater than that of coniferous species. There was a logarithmic relationship between the water holding capacity of litter and soaking time (Y=alnt b). (3). The rate of water absorption of the same forest and commercial forest was almost the same, except for the mixed oak, the water absorption rate of other types of public welfare forest was higher than that of the same type of commercial forest. The relationship between the water absorption rate of litter and the soaking time of different stands showed a power function relationship (YYT ~ (-b). (_ 4). The maximum water holding capacity (3.416 mm) of pure Pinus simao forest (3.416 mm) was larger than that of evergreen broadleaved forest (2.686 mm). The interception capacity of rainfall was also the best (2.033 mm); commercial forest, the most effective interception of litter (1.394mm), the largest degree of interference in rubber forest litter effective storage capacity (0.434 mm). Comprehensive analysis shows that the hydro-ecological function of litters in public welfare forest is better than that in commercial forest in the subtropical area of southern Yunnan. The integrity of litter layer is destroyed and the hydrological function of litterfall layer is weakened because of artificial management. Therefore, human disturbance is one of the main factors that affect the hydrological function of litter layer.
【作者單位】: 西南林業(yè)大學林學院;江城縣勐烈鎮(zhèn)林業(yè)服務(wù)中心;中國科學院地理科學與資源研究所;
【基金】:國家自然科學基金項目(31660173) 西南林業(yè)大學云南省省級重點學科(林學)(2012BAD23B04) 云南省林學一流學科建設(shè)項目(51600625) 云南省教育廳重點項目(515006009) 普洱市林業(yè)局委托項目(215660)
【分類號】:S714
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