| 摘要: |
| [目的]在黄土高原丘陵沟壑区不同立地条件下,研究刺槐人工林无性繁殖与更新状况,为该地区刺槐人工林的经营管理提供依据.[方法]对黄土丘陵沟壑区安塞试验站、纸坊沟和县南沟流域12个阳坡和阴坡刺槐人工林样地的林分特征、土壤含水量、外界干扰、无性繁殖和林下物种进行了系统调查.[结果]阴坡样地不同深度土层的平均土壤含水率高于阳坡样地;生长在阴坡的刺槐人工林无性繁殖较阳坡旺盛,阴坡无性株萌蘖的数量和扩散范围明显大于阳坡;在相同坡向的刺槐林群落中,坡下部的根系萌苗量大于坡上部;影响刺槐无性繁殖的另一个重要因素是外界干扰,在立地条件差、人为践踏、砍伐和放牧的样地中,刺槐人工林的根系萌苗扩散程度大于无外界干扰或干扰较轻的样地;不同立地条件下刺槐的无性繁殖潜力趋势为:阴坡下部阳坡下部阴坡上部阳坡上部.[结论]刺槐人工林在黄土丘陵沟壑区的适生范围是阴坡下部及沟谷地区. |
| 关键词: 黄土高原 刺槐人工林 不同立地条件 无性繁殖 |
| DOI： |
| 分类号:S157.1 |
| 基金项目:国家科技支撑项目，中国科学院西部行动计划项目? |
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| A study on asexual reproduction and regeneration of Robinia pseudoacacia plantations in different habitats in Hilly Area of the Loess Plateau |
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ZHANG Chang-qing ZHANG Wen-hui
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| Abstract: |
| 【Objective】 The research studied the asexual reproduction of Robinia pseudoacaciaplantation in different habitat standings in Loess Hilly Regions,providing the gist for Robinia pseudoacaciaplantation's management.【Method】 12 plots were investigated in both sunny slope and cloudy slope in zhi fang gou and xian nan gou of Loess Hilly Regions,including forest characters，character of soil water capacity,influence factor,asexual reproduction and species in community.【Result】 The character of soil water capacity in cloudy slope was higher than that in sunny slope; Robinia pseudoacaciaplantation reproduction proliferation in cloudy slope was better than that in sunny slope so were the numbers and regions;and the vegetative dispersal at the downside was better than the upside in the same slope.External interference was another important factor which affected vegetative dispersal.The study showed that the vegetative dispersal of Robinia pseudoacaciaplantation in the worse plots which were trampled,project destructed and animals gnawed were better than that with no disturbance or little disturbance;the driection of asexual reproductive potential in different habitat standings was:cloudy slope downside>sunny slope downside>cloudy slope upside>sunny slope upside.【Conclusion】 Robinia pseudoacaciaplantations' suitable areas is cloudy slope downside. |
| Key words: Loess plateau locust tree plantation different habitat asexual reproduction |
