【作者】 黄进；

【导师】 张金池；

【作者基本信息】 南京林业大学 ， 生态学， 2011， 博士

【摘要】 本研究选择苏南丘陵山区主要森林类型——麻栎林、毛竹林、杉木林、马尾松林为研究对象,采用野外定位观测与室内模拟试验相结合的方法,研究了4种森林类型的林冠层、枯落物层和土壤层三个主要层次的防水蚀功能。主要结论如下：(1)不同森林类型林冠层的水文功能存在着一定的差异,毛竹林的林冠截留率最高(26.64%),其次为麻栎林(22.64%),再次为杉木林(21.29%),马尾松林最低(15.28%)；林冠截留量随降雨量的增加呈Power型曲线(y=axb)增加,林冠截留率随降雨量的增加呈Logarithmic型曲线(y=a+blnx)减少。各森林类型对降雨侵蚀力有着较好的削弱作用,麻栋、毛竹、杉木、马尾松的年林内降雨侵蚀力分别为林外的63.397%、49.605%、63.536%和74.035%。(2)枯落物层最大持水量排序为麻栎林(39.214 t·hm-2)>毛竹林(38.182t·hm-2)>杉木林(17.734 t·hm-2)>马尾松林(6.765 t·hm-2)。相同干重条件下,麻栎林枯落物层的糙率系数最高,其次为毛竹林,再次为杉木,马尾松林最低。枯落物层持水速度(mm/h)随浸水时间(h)的增加呈Power型曲线(y=axb)减少。糙率系数n值随枯落物层干重的增加呈Logarithmic型曲线(y=a+blnx)增加。(3)基于主成分分析,各森林类型土壤层水文功能排序为毛竹林>麻栎林>杉木林>马尾松林。基于灰色关联分析表明,各森林类型土壤抗蚀性以毛竹林较强,麻栎林和杉木林属于中等,马尾松林属较弱。土壤抗剪性能排序为麻栎>马尾松林>杉木林>毛竹林。土壤抗冲性能排序为毛竹林>杉木林>麻栎林>马尾松林。研究区各森林类型土壤的渗透性能、抗剪性能、抗冲性能均可用少数土壤理化因子组成的多元线性方程来表征。(4)本研究分别构建了具有一定广泛适用性和客观科学性的森林水源涵养功能综合评价方法、土壤抗水蚀功能综合评价方法、森林防水蚀功能综合评价体系。研究区森林类型水源涵养功能评价结果表明：毛竹林属于较好等级,麻栎林属于中等,杉木林属于较差等级,而马尾松林均属于差等级；土壤抗水蚀功能评价结果表明：毛竹林土壤属于较强等级,麻栎林、马尾松林和杉木林均属于中等；森林防水蚀功能评价结果表明：毛竹林属于较强等级,麻栎和杉木属于中等,马尾松林属于较弱。更多还原

【Abstract】 This study chose main forests such as Quercus (Quercus acutissima), Bamboo (Phyllostachys pubescens), Chinese fir (Cunninghamia lanceolata) and Masson pine (Pinus massoniana Lamb) in the south hilly and mountain region of Jiangsu Province. The experiment studied the anti warer ersion fuction of the three main layers, such as canopy, litter and soil in the four typical forests by the method of the positioning observation in the field and indoor simulation. The main conclusions as follows:(1) There were some difference among the hydrological function of different forests, the canopy interception rate of Bamboo was the highest (26.64%), the second one was Quercus (22.64%), the third one was Chinese fir (21.29%), and the last one was Masson pine (15.28%). Canopy interception (mm) increased with the increase of rainfall (mm) by Power model (y=axb), canopy interception rate (%) reduced with the increase of rainfall (mm) by Logarithmic model (y=a+blnx). Four forests had slowed down the rainfall erosivity well, the annual rainfall erosivity under Quercus, Bamboo, Chinese fir and Masson pine were 63.397%,49.605%, 63.536% and 74.035% of the one outside respectively.(2) The largest water-holding capacity of litter was in order of Quercus (39.214t·hm-2)> Bamboo (38.182 t·hm-2)> Chinese fir(17.734t·hm-2)> Masson pine (6.765t·hm-2). When dry weigh was same, the roughness coefficient of litter of Quercus was the highest (26.64%), the second one was Bamboo, the third one was Chinese fir, and the last one was Masson pine. Water-holding velocity (mm/h) of litter reduced with the increase of impinging time (h) by Power model (y=axb). Roughness coefficient of litter increased with the increase of dry weigh by Logarithmic model (y=a+blnx).(3) Based on the principal component analysis, soil hydrological function was in order of Bamboo> Quercus> Chinese fir> Masson pine. Based on grey correlation analysis, evaluation results of soil anti-erodibility of forests showed that:Bamboo belonged to relatively strong, Quercus and Chinese fir belonged to middle, Masson pine belonged to relatively poor. Soil shear-resistantance of different forests was in order of Quercus> Masson pine> Chinese fir> Bamboo. Soil anti-scourability of different forests was in order of Bamboo> Chinese fir> Quercus> Masson pine. Soil permeability, soil shear-resistantance and soil anti-scourability could be described by plural linear regression equations of some soil physical and chemistry factors.(4) The comprehensive evaluation method of forest water conservation function, comprehensive evaluation method of soil anti water erosion function and comprehensive evaluation system of forest anti water erosion function, all of them had a certain extensive applicability and scientific. The evaluation results of forest water conservation function in the study region showed that:Bamboo belonged to relatively good, Quercus belonged to middle, Chinese fir belonged to relatively bad, Masson pine belonged to bad; the evaluation results of soil anti water erosion function showed that:Bamboo belonged to relatively strong, Quercus, Chinese fir and Masson pine belonged to middle; the evaluation results of forest anti water erosion function showed that:Bamboo belonged to relatively strong, Quercus and Chinese fir belonged to middle, Masson pine belonged to relatively poor.更多还原