中国岩溶2018，Vol.37Issue(1)：53-58,6.DOI:10.11932/karst2017y60
喀斯特地区不同坡位条件下优势灌木根际与非根际土壤养分与pH的分布特征
Distribution characteristics of soil nutrient and pH in rhizosphere versus non-rhizosphere from dominant shrub along different slope position in a karst region
摘要
Abstract
To test the effects of plant type and slope position on the distribution characteristics of nutrients and pH in plant rhizosphere and non-rhizosphere soil,two dominant shrubs (Syzygium championii and Pyracantha fortuneana) were selected in a karst region of Guangxi,Southwest China.Rhizosphere soil showed nutrients enrichment.An enrichment of soil organic carbon and available phosphorus was more pronounced in pyracanthafortuneana rhizosphere,and an enrichment of soil organic carbon and total nitrogen was also found in syzygium championii rhizosphere.Significant difference in soil nutrients among slope positions was found in shrub rhizosphere and non-rhizosphere (p＜0.05).In rhizosphere soil,soil organic carbon content had significantly positive correlation with total nitrogen content and significantly negative correlation with available phosphorus content (p＜0.05).In non-rhizosphere soil,soil organic carbon content had significantly positive correlations with the content of total nitrogen and available phosphorus (p＜0.05).A two-factor variance analysis showed that slope position had greater effect on physico-chemical properties than plant type.The above results suggested that the dominant plants in karst shrub are beneficial to improve the utilization of soil nutrients.In addition,slope position should be considered,when shrub species were used to improve soil quality in karst regions.关键词
喀斯特地区/灌木/根际土/土壤养分/坡位Key words
karst region/shrub/rhizosphere soil/soil nutrients/slope position分类
农业科技引用本文复制引用
梁月明,苏以荣,何寻阳,陈香碧..喀斯特地区不同坡位条件下优势灌木根际与非根际土壤养分与pH的分布特征[J].中国岩溶,2018,37(1):53-58,6.基金项目
国家自然科学基金(31741021) （31741021）
广西自然科学基金项目(2016GXNSFBA380179) （2016GXNSFBA380179）
20176GNSFAA 198241) （）
岩溶地质研究所基本科研业务费项目(2016004) （2016004）
中国科学院西部之光人才培养计划“西部青年学者”项目(Y62305040) （Y62305040）
中国地质大调查项目(DD20160305) （DD20160305）
