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当前位置: 首页 > 文章 > 滨海土壤I-69杨根际无机磷形态分布及有效性研究 土壤通报 2003,34 (1) 44-47
Position: Home > Articles > Distribution and Availability of Inorganic Phosphorus Fractions in the Rhizosphere of Populus deltoides cv.'lux' Grown in Marine Soil Chinese Journal of Soil Science 2003,34 (1) 44-47

滨海土壤I-69杨根际无机磷形态分布及有效性研究

作  者：
张金龙;田野;丁应祥
单  位：
天津经济开发区园林绿化公司;南京林业大学森林资源与环境学院
关键词：
I-69杨;滨海土壤;根际;无机磷形态;有效性
摘  要：
对滨海脱盐土壤或轻度盐渍土壤上不同林龄I -69杨根际、非根际无机磷存在形态、数量和有效性进行了研究 ,结果表明 :I -69杨根系活动能明显提高根际土壤供磷能力 ,3、5、11年生I -69杨根际有效磷明显富集 ,富集量分别为3 .87、4.3 2、4.3 5mg/kg ;Ca2 -P在不同林龄I -69杨根际含量明显高于非根际土 ,差异都达到极显著水平 ,R/S随林龄增大分别是 2 .15、2 .5 9、5 .5 4;Ca8-P在 5、11年生I -69杨根际明显富集 ,而Ca10 -P明显亏缺 ;不同林龄I -69杨根际、非根际土Al-P、Fe -P和O -P含量无明显差异 ,盐渍土壤中它们的生物有效性较低。
译  名：
Distribution and Availability of Inorganic Phosphorus Fractions in the Rhizosphere of Populus deltoides cv.'lux' Grown in Marine Soil
作  者：
ZHANG Jin-long 1,TIAN Ye 2,DING Ying-xiang 2 (1.Tianjin Teda Landscaping Company, Tianjin 300457; 2.Faculty of Forestry Resources and Environment, Nanjing Forestry University,Nanjing 210037,China)
关键词：
Populus deltoides cv.'lux' ;Marine soil;Rhizosphere;Inorganic phosphorus fractions;Availability
摘  要：
In the present experiment, the distribution characteristics and availability of inorganic phosphorus fractions in the rhizosphere and non-rhizosphere soil of Populus deltoides cv. 'lux' were investigated. The results showed that (1) Available P was accumulated clearly in the rhizosphere of 3,5 and 11 year-old stands and the accumulation rates were 44%, 96% and 574%, respectively; (2) The contents of Ca 2-P in the rhizosphere of 3,5 and 11 year-old poplar were higher than those in the non-rhizosphere,and the rhizospheric effects (R/S) were 2.15, 2.59 and 5.54, respectively; (3) In the rhizosphere of 5 and 11 year-old poplar, Ca 8-P was accumulated, whereas Ca 10 -P was depleted clearly and the decrease of Ca 10 -P corresponded with the changes of available P, suggesting a stronger consumption in older stands for the P-activation from Ca 10 -P to more available P;(4) There was no obvious difference in Al-P, Fe-P and O-P between rhizosphere and non-rhizosphere soil.

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