不同混交模式毛竹林下土壤抗侵蚀性研究
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国家"十二五"科技支撑项目"竹藤资源高效培育技术研究与示范"(2012BAD23B04)


Soil Anti-erodibility Under Moso Bamboo with Different Mixture Patterns
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    摘要:

    [目的] 揭示毛竹林下土壤抗蚀性的主要影响要因子,为进一步研究土壤抗蚀性影响机制提供参考。[方法] 采用野外调查与室内分析相结合的方法,以常绿阔叶林和杉木林为对照,开展了8竹2阔林、6竹4阔林、毛竹纯林、8杉2竹林等不同混交模式毛竹林土壤抗蚀性及其影响因素研究。[结果] 常绿阔叶林的土壤抗蚀性最强,杉木纯林最差,毛竹混交林抗蚀性优于毛竹纯林,混交林中6竹4阔林的抗蚀性较好,8竹2阔和8杉2竹林次之。崩解速率的变化趋势与抗蚀性变化趋势不同,常绿阔叶林土壤崩解速率最慢,6竹4阔林最快,8竹2阔林、杉木林、8杉2竹林低于毛竹纯林。综合考虑不同林分类型的土壤抗蚀性和崩解速率,8竹2阔林是一个较好的混交模式。[结论] 土壤和植被结构对土壤抗蚀性有重要影响,毛竹林土壤抗蚀性与有机质含量、非毛管孔隙度、总孔隙度、土壤容重、竹鞭的生物量、枝叶生物量存在着显著的相关关系(p<0.05),其中土壤有机质含量和枝生物量对土壤抗蚀性影响最大。

    Abstract:

    [Objective] To reveal the key factor of soil anti-erodibility in filed of moso bamboo in order to provide references for further studing influence mechanism of soil anti-erodibility. [Methods] Using the method of field investigation and laboratory analysis, changes and influences of soil anti-erodibility under moso bamaboo with different mixture patterns were examined. The forest types included the forest Ⅰ(evergreen broad-leaved forest), Ⅱ(ratio of moso bamboo to broadleaf trees was 8:2), Ⅲ(ratio of moso bamboo to broadleaf trees was 6:4), Ⅳ(pure-moso bamboo forest), Ⅴ(ratio of Chinese fir to moso bamboo was 8:2), and Ⅵ(Chinese fir). [Results] The soil anti-erodibility was the strongest for evergreen broad-leaved forest and the poorest for Chinese fir. The soil anti-erodibility of mixed-moso bamboo forests was better than pure-moso bamboo's. Among those mixed-moso bamboo forests, the forest Ⅲ was the best one, followed by the forest Ⅱ and forest Ⅳ. The changes of soil disintegration rate of those forests were different from the trend of the soil anti-erodibility. The soil disintegration rate was slowest for evergreen broad-leaved forest and fastest for forest Ⅲ. The forest Ⅱ, Ⅴ, and Ⅵ were better than the pure-moso bamboo forest. With regard to the different forest types of soil anti-erodibility and disintegration rate, the forest Ⅱ was regarded as the better forest type. [Conclusion] There was a significant correlation(p<0.05) between the soil anti-erodibility and organic matter content, non-capillary porosity, total porosity, soil bulk density, rhizome biomass, and foliage biomass based on correlation analysis. The soil anti-erodibility was affected by change of soil and vegetation structure. The changes of soil anti-erodibility credited biomass distribution and change of soil structure.

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刘广路,范少辉,蔡春菊,张昌顺,官凤英.不同混交模式毛竹林下土壤抗侵蚀性研究[J].水土保持通报,2015,35(4):12-17

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  • 收稿日期:2014-06-09
  • 最后修改日期:2014-06-30
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  • 在线发布日期: 2016-04-05
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