摘要
以陕西省煤炭基地的铜川市为研究对象,采集70个耕地样品,分析土壤有机质、碱解氮、速效磷等理化性质,并采用相关和主成分分析法对供试土壤的质量进行初步评价。结果表明,铜川市土壤有机质含量、碱解氮、速效磷含量均维持在较低水平,尚不能满足农业生产的需要,需采取合适措施进行培肥;钾含量稳中有升;土壤中的硫素不缺乏;主成分分析构建的土壤肥力系统可较好表征土壤肥力状况,据主成分综合得分将供试土样划分为高、中、低3类,分别占8.57%、54.28%和37.14%,可见铜川地区土壤肥力水平总体偏低;主成分的综合得分可以较好反映供试土样间肥力水平的差异。
By correlation and Principle Component Analyze（PCA）.Soil quality was assessed in 70 soil samples in Tongchuan city as coal base in Shaanxi province after analyzed soil organic matter,available nitrogen,available phosphate etc.The results showed as follows,the content of organic matter,available nitrogen and available phosphate were lower to supply plant growth,it is needed to improve soil nutrient levels by fertilization.Potassium was better than other chemical properties so that it is distinguish to fertilize different plots.Sulfur was enough for plants to grow because of higher available sulfur.The soil fertility information system can be an good index to indicate soil fertility levels by PCA.The soil samples with higher,middle and lower fertility account for 8.57%,54.28% and 37.14% respectively of total 70 samples,which indicated that the soil fertility level was lower status in Tongchuan region.The composite scores can be a better index to indicate soil fertility levels among soil samples tested.
出处
《西北农业学报》
CAS
CSCD
北大核心
2011年第9期202-206,共5页
Acta Agriculturae Boreali-occidentalis Sinica
基金
农业部测土配方施肥项目
关键词
土壤理化性质
主成分分析
土壤肥力
综合得分
Soil physic-chemical properties
Principle component analyze
Soil fertility
Composite scores
