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。
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
Abstract: 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),MROP( 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．
Key words:
Long-term fertilizer experiment,
Phosphorus forms,
Correlation coefficient,
Path coefficient,
Multiple regression analysis．
中图分类号:
杨艳菊, 王改兰, 张海鹏, 赵旭. 长期施肥对黄土丘陵区土壤各形态磷之间关系的影响[J]. 华北农学报, 2012, 27(6): 191-195. doi: 10.3969/j.issn.1000-7091.2012.06.037.
YANG Yan-ju, WANG Gai-lan, ZHANG Hai-peng, ZHAO Xu. Effects of Long-term Fertilization on Relationship among Phosphorus Forms in Loess Hilly-gully Region[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2012, 27(6): 191-195. doi: 10.3969/j.issn.1000-7091.2012.06.037.