摘要
三七(Panax notoginseng)的连作障碍效应严重,但其连作土壤质量研究尚属空白。本研究采用主成分分析结合聚类分析的方法对三七连作土壤质量进行综合评价,结果发现:微生物多样性指数、土壤真菌数量与比例及土壤P和K含量是决定土壤质量的关键因素。土壤质量综合评价指数(f值)可以较好地反映实际土壤质量,并能够在一定程度上反应三七植株的生长状况,是较为理想的土壤质量评价指标。
Continuous planting obstacle is a serious problem in Panax notoginseng culture, but few studies have been performed to evaluate the soil quality under P. notoginseng continuous planting. In this paper, a comprehensive assessment was made on the soil quality under P. noto- ginseng continuous planting by using principal component analysis and cluster analysis. Our re- sults showed that the key factors determining the soil quality were the diversity of microorganisms, abundance and relative ratio of soil fungi, and soil phosphorus and potassium contents. The com- prehensive assessment index （f value） could better reflect the soil quality and the growth status of P. notoginseng plant, being an appropriate index for the assessment of soil quality under P. no- toginseng continuous planting.
出处
《生态学杂志》
CAS
CSCD
北大核心
2013年第6期1636-1644,共9页
Chinese Journal of Ecology
基金
国家自然科学基金项目(81102751)资助
关键词
三七
连作土壤
质量评价
主成分分析
Panax notoginseng
continuously planted soil
quality assessment
principal component analysis
