摘要
选择川东北平昌县农业土壤有机质、全氮、全磷、全钾、速效钾、有效氮、速效磷、有效铜、有效锌、有效铁、有效锰、有效硼和有效钼共13个指标,土壤养分含量统计显示:平昌县土壤养分指标中全钾、速效钾、有效铁和有效锰平均含量高于全省平均值,其余9项指标均低于全省平均水平。与第二次土壤普查农耕地普查资料相比,平昌县农业土壤有效铜、锌、铁、锰含量有上升趋势,全磷和全钾含量呈下降趋势。运用物元模型对土壤养分进行综合评价,结果表明:研究区没有Ⅰ级养分土壤,其中Ⅱ级养分土壤占6.12%,Ⅲ级养分土壤占8.16%,Ⅳ级养分土壤占78.57%,Ⅴ级养分土壤占7.14%。处于养分贫乏(Ⅳ级)和极贫乏(Ⅴ级)的土壤共占85.71%,总体看来,平昌县土壤养分状况较差。
13 soil nutrient indicators were chosen to evaluate the soil quality of Pingchang County,statistics analysis showed that： the average contents of Total K,Available K,Available Fe and Available Mn in Pingchang were higher than that of Sichuan Province,but the contents of the other 9 indicators were lower.Compared with the data of the second soil survey of agricultural land census,the contents of Available Cu,Available Zn,Available Fe and Available Mn showed a rising trend,while Total P and Total K a droppint trend.Based on the matter-element model,the comprehensive soil nutrients were evaluated,and the results showed： there was no Grade Ⅰ nutrient soil in Pingchang County,the Grade Ⅱ soil ratio was 6.12%,the Grade Ⅲ soil ratio was 8.16%,the Grade Ⅳsoil ratio was 78.57%,and the Grade Ⅴ soil ratio was 7.14%.The total ratio of soil of poor nutrients and extremely poor nutrients was 85.71%.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2011年第2期381-387,共7页
Acta Agriculturae Universitatis Jiangxiensis
基金
中国科学院知识创新工程项目(KSCX2-YW-G-071)资助
关键词
物元模型
土壤养分评价
低山丘陵区
matter-element model
soil nutrient evaluation
low mountains and hills
