长期施肥对黄土丘陵区土壤各形态磷之间关系的影响  

Effects of Long-term Fertilization on Relationship among Phosphorus Forms in Loess Hilly-gully Region

作　　者：杨艳菊[1] 王改兰[1] 张海鹏[1] 赵旭[1] 

机构地区：[1]湖南农业大学资源环境学院,土壤肥料资源高效利用国家工程实验室,湖南长沙410128

出　　处：《华北农学报》2012年第6期191-195,共5页Acta Agriculturae Boreali-Sinica

基　　金：国家自然科学基金项目(49971040);湖南农业大学人才引进资金项目

摘　　要：采用Bowman-Cole的土壤有机磷分级体系及蒋柏藩-顾益初的无机磷分级体系,运用相关分析,通径分析和回归分析,研究了长期不同施肥条件下土壤有机磷组分、无机磷组分与土壤速效磷相关关系。结果表明,Ca2-P(0.985 5)、Ca8-P(0.938 0)、Al-P(0.887 4)、Fe-P(0.850 7)、中活性有机磷(0.851 0)和中稳性有机磷(0.8905)与速效磷的相关性达极显著水平,O-P(0.790 4)、Ca10-P(0.752 7)与速效磷的相关性达显著水平;通径分析结果表明,无机磷各形态对速效磷的直接作用大小顺序为:Al-P(-1.189 0)>Ca2-P(1.027 4)>O-P(0.763 4)>Ca8-P(0.663 8)>Fe-P(-0.423 0)>Ca10-P(0.323 2),有机磷各形态对速效磷的直接作用大小顺序为:中活性有机磷(0.762 9)>中稳性有机磷(0.276 3)>高稳性有机磷(-0.238 4)>活性有机磷(0.195 2);逐步回归分析表明,Ca2-P、Ca8-P、O-P和中活性有机磷都是土壤速效磷的有效来源。In order to assess the influence of the relationships among phosphorus forms,the correlation analysis,path analysis and multiple regression analysis of organic phosphorus and inorganic phosphorus in loess hilly-gully region after 24 years continuum application fertilizers were researched by the methods of Bowman-Cole′s and Jiang-Gu′s.The results showed that Ca2-P（0.985 5）,Ca8-P（0.938 0）,Al-P（0.887 4）,Fe-P（0.850 7）,ML-OP（0.851 0）,MR-OP（0.890 5）,O-P（0.790 4） and Ca10-P（0.752 7） with Olsen-P reached a significant or extremely significant correlation;The order of direct effect of inorganic phosphorus forms on Olsen-P was Al-P（-1.189 0）Ca2-P（1.027 4）O-P（0.763 4）Ca8-P（0.663 8）Fe-P（-0.423 0）Ca10-P（0.323 2）;Organic phosphorus forms was ML-OR（0.762 9）MR-OP（0.276 3）HR-OP（-0.238 4）L-OP（0.195 2）.The Ca2-P,Ca8-P,O-P and ML-OP were main source of available phosphorus by the multiple regression analysis results.

关 键 词：长期定位试验 磷形态 相关性分析 通径分析 逐步回归分析 

分 类 号：S143.2[农业科学—肥料学]