摘要
【目的】本研究揭示了喀斯特地区土壤的肥力水平。【方法】在贵州印江典型喀斯特区域采集了26个土壤样品,并采用主成分分析法和模糊综合评价法对供试土壤进行了土壤肥力综合评价。【结果】受pH的影响,喀斯特地区土壤的有效N和有效Fe含量较低;根据模糊综合评价法,喀斯特地区土壤肥力水平均在中等偏上;主成分分析和模糊综合评价2种方法的评价结果间具有极显著的正相关性,互相佐证了评价结果的准确性;受施肥等因素影响,不同土地利用方式和不同地形部位土壤的肥力水平大小关系为:耕地>果园>林地和槽谷>山坡,但各差异间均未达到显著性水平。【结论】研究结果为全面评价喀斯特地区土壤肥力提供了科学依据。
【Objective】The karst area is extensively distributed in the Southwest China,and this study reveals the soil fertility in this area.【Method】26 soil samples were collected from Yinjiang,Guizhou and the soil fertility of these soils were evaluated by the methods of analysis of principal component and fuzzy synthetic evaluation.【Result】The contents of available N and available Fe in these soils were lower due to the high pH value. According to the method of fuzzy synthetic evaluation,the soil fertility in the karst region was above the average. There was a significant positive correlation between the results of the evaluations by the two methods of principal component analysis and fuzzy comprehensive evaluation,which corroborated the accuracy of the evaluation results. Affected by fertilization,the fertilities of soils in different land use types were followed in this order:cultivated land> orchard> woodland,and the fertility of soils in different topography was followed in this order:trough> hill. However,the differences of soil fertility in different land use type and different topography were not significant.【Conclusion】The results in this study provided a scientific basis for comprehensive evaluation of soil fertility in karst regions.
作者
杨文娜
任嘉欣
李忠意
徐义
李振轮
何丙辉
YANG Wen-na;REN Jia-xin;LI Zhong-yi;XU Yi;LI Zhen-lun;HE Bing-hui(College of Resources and Environment,Southwest University,Chongqing 400716,China)
出处
《西南农业学报》
CSCD
北大核心
2019年第6期1307-1313,共7页
Southwest China Journal of Agricultural Sciences
基金
国家重点研发计划课题(2016YFC0502303)
国家自然科学基金(41701256)
中国博士后科学基金(2017M610584)
关键词
喀斯特土壤
养分水平
主成分分析
模糊综合评价
Karst soil
Nutrient level
Principal component analysis
Fuzzy comprehensive evaluation
