【作者】 王丁；

【导师】 薛建辉；

【作者基本信息】 南京林业大学 ， 生态学， 2009， 博士

【摘要】 本研究设置了3种土壤干旱胁迫强度和对照,共4个处理,每一个处理五个重复,采用生理生态学试验方法探讨6个树种苗木对水分亏缺的适应方式、途径,并评价其耐旱适应性,试图为我国西南喀斯特石漠化山地的植被恢复与重建提供理论依据。主要结果如下:1.通过对6种苗木在正常供水和干旱胁迫条件下苗木叶片水势的测定,运用隶属函数累加法综合评价6种苗木的吸水潜能,其大小排序为:侧柏>滇柏>刺槐>香樟>构树>杜英。2.在正常供水和干旱胁迫条件下,对6种苗木4个水力结构参数进行测定,并运用隶属函数累加法综合评价6种苗木的水分运输效率,其大小排序为:刺槐>构树>香樟>侧柏>杜英>滇柏。3.在正常供水和干旱胁迫条件下,对6种苗木叶片含水量和叶片相对含水量进行测定,运用隶属函数法对6种苗木叶片保水能力进行评价,其结果大小排序为:香樟>滇柏>杜英>刺槐>构树>侧柏。4.通过对6种苗木在正常供水和干旱胁迫条件下苗木耗水量的测定,运用隶属函数法对其耗水能力进行综合评价,其结果大小排序为:刺槐>构树>香樟>杜英>滇柏>侧柏。5.应用隶属函数累加法和多维空间坐标综合评定法两种方法对6个树种苗木进行了综合评价,并进行综合比较,认为在被评价树种数量较少的情况下,可采用多维坐标综合评价法对树种抗旱性进行评价,其适用性较好。更多还原

【Abstract】 In this experiment, three intensities of soil drought stress treatments and four control treatments have been set up, and each treatment has five repeats, adopting method of physiological ecology to explore the adaptive mode and way of 6 tree species seedlings with water deficiency. Moreover, their drought-enduring adaptability has been evaluated in order to provide theoretical basis for vegetation restoration and reconstruction in southwest karst rocky desertification of mountainous region. Main results are as follows.1. Leaf water potential of six tree species was measured under normal and drought tress, then its potential of absorption was evaluated by subordinate function method. The result showed Orientalis>Cipressus duclouxiana >pseudoacacia >Cinnamonum campora > Broussonetia papyrifera >Elaeocarpus sylvestris.2. Parameter of hydraulic architecture of six tree species was measured under normal and drought tress, and water transportation efficiency’s characteristic was evaluated by subordinate function method. The result showed pseudoacacia > Broussonetia papyrifera >Cinnamonum campora >Orientalis > Elaeocarpus sylvestris > Cipressus duclouxiana.3. leaf water content and leaf water relative content of six tree species was measured under normal and drought tress, and the holding water capability of seedlings was evaluated by subordinate function method. The result showed Cinnamonum campora > Cipressus duclouxiana> Elaeocarpus sylvestris.> pseudoacacia > Broussonetia papyrifera > Orientalis.4. Water consumption of six tree species was measured under normal and drought tress, and the capability of water consumption of seedlings was evaluated by subordinate function method. The result showed: Cinnamonum campora > Cipressus duclouxiana> Elaeocarpus sylvestris.> pseudoacacia > Broussonetia papyrifera > Orientalis.5. Six tree species seedlings’drought resistance was evaluated by method of subordinate function and coordinate composite evaluation of multiple dimension space and the result was compared. Coordinate composite evaluation of multiple dimension space method is better if the amount of tree species is less.更多还原