%0 Journal Article
%T Evaluation of soil quality under conservation tillage via factor and cluster analyses<br>基于因子和聚类分析的保护性耕作土壤质量评价研究
%A WU Yu-Hong
%A TIAN Xiao-Hong
%A NAN Xiong-Xiong
%A CHI Wen-Bo
%A YAN Xiao-Li
%A ZHU Rui-Xiang
%A TONG Yan-An
%A <br>吴玉红
%A 田霄鸿
%A 南雄雄
%A 池文博
%A 闫小丽
%A 朱瑞祥
%A 同延安
%J 中国生态农业学报
%D 2010
%I 
%X In this study, factor (FA) and cluster (CA) analyses were used to evaluate the effect of the patterns of conservation tillage on soil quality. The squared Euclidean distance method of hierarchical cluster analysis was used for the cluster analysis. Twelve quantitative indicators related to soil property were selected based on results from long-term experimentation. Using factor analysis, five soil common quality factors (i.e., maintenance and supply capacity of soil nutrient, organic matter, phosphorus, bulk density, and enzyme activity) were derived from 12 soil chemical, physical and biological attributes. Factor scores show significant differences in superiority of the five common factors under different tillage patterns. Soil quality scores for conservation tillage (CT) are higher compared with traditional tillage (TT), implying improved soil physical, chemical and biological properties along with soil quality under CT. The top three integrated patterns with the highest scores include 30 cm subsoiling at one-year interval (NS2); combined straw mulching and 20 cm subsoiling, rotary tillage (SR2); and 30 cm subsoiling at yearly interval (NS3). This suggests outstanding advantage of the top integrated patterns in improving soil structure, soil fertility and overall soil quality. CA shows small differences in soil quality among different patterns under one tillage practice, indicating that tillage measurement is the key factor of soil quality.
%K Conservation tillage
%K Soil quality
%K Factor analysis
%K Cluster analysis<br>保护性耕作
%K 土壤质量
%K 因子分析
%K 聚类分析
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=AB3ABF502E2E1FF39F0E3B80164C9031&aid=B335AD8111D3736ED142D16CC73FB25C&yid=140ECF96957D60B2&vid=13553B2D12F347E8&iid=0B39A22176CE99FB&sid=E089FDF3CDAE8561&eid=CA5852BD1A173B3A&journal_id=1671-3990&journal_name=中国生态农业学报&referenced_num=3&reference_num=20