不同混交模式毛竹林下土壤抗侵蚀性研究  

Soil Anti-erodibility Under Moso Bamboo with Different Mixture Patterns

作　　者：刘广路 范少辉 蔡春菊 张昌顺[1,2] 官凤英 

机构地区：[1]国际竹藤中心竹藤科学与技术重点实验室,北京100102 [2]中国科学院地理科学与资源研究所,北京100101

出　　处：《水土保持通报》2015年第4期12-17,共6页Bulletin of Soil and Water Conservation

基　　金：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)

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。[Objective] To reveal the key factor of soil anti-erodibility in filed of moso bamboo in order to pro- vide 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 broadleaved 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.

关 键 词：毛竹林 混交模式 土壤抗蚀性 影响因子 

分 类 号：S714.2[农业科学—林学]