落叶松根际土壤磷的有效性研究

应用生态学报 ›› 2001, Vol. ›› Issue (1): 31-34.

落叶松根际土壤磷的有效性研究

张彦东¹, 白尚斌², 王政权², 王庆成²

1. 中国科学院西双版纳热带植物园, 昆明650223;
2. 东北业大学, 哈尔滨150040

收稿日期:1999-04-12 修回日期:1999-09-28 出版日期:2001-01-25
通讯作者: 张彦东,男,1963年4月生,博士,副教授,主要研究领域为森林培育及林地营养管理,发表论文30余篇.E-mail:zhyd@public.km.yn.cn
基金资助:
教育部优秀青年教师基金资助项目

Soil P availability in larch rhizosphere

ZHANG Yandong¹, BAI Shangbin², WANG Zhengquan², WANG Qingcheng ²

1. Xishuangbanna Tropical Botanic Garden, Chinese Academy of Sciences, Kunming 650223;
2. School of Forest Resource, Environments, Northeast Forestry University, Harbin 150040

Received:1999-04-12 Revised:1999-09-28 Online:2001-01-25

摘要/Abstract

摘要： 野外用剥落法采集落叶松(Larixgmelini)根际土与非根际土,分析P浓度的变化,结果表明,落叶松根际土与非根际土全P浓度无明显差异,但根际土有效P却明显高于非根际土.12年生时根际土有效P增加12.6%,40年生时增加23.4%,表明落叶松根际对土壤中的P具有活化作用.落叶松根际土无机P各组分与非根际土亦有差异,表现出根际土OP低于非根际土,AlP、FeP、CaP和NH4ClP则高于非根际土的趋势.落叶松根际土的pH低于非根际土,但落叶松根际并未发生明显酸化.落叶松根际有效P与pH变化相关不显著.

Abstract: Soil samples were collected from the rhizosphere, non rhizosphere of larch(Larix gmelini) stand by exfoliation method,, the variation of P concentration was analyzed. The results show that there was no significant difference between total P concentrations in the rhizosphere, the non-rhizosphere soil,while the concentration of available P in rizhosphere soil was significantly higher than that in the non-rhizosphere soil.The concentrations of available P in rhizosphere 12 years old, 40 years old larch rhizosphered by 12.6%, 23.4% respectively,indicating that larch roots had the effect of mobilizing soil phosphorus.The components of inorganic P in rhizospheric soil were different from those in non-rhizospheric soil.The concentration of O-P was lower,and the concentrations of Al-P,Fe-P,Ca-P,NH₄Cl-P were higher in the rhizosphere.The pH of rhizospheric soil was lower than that of non-rhizospheric soil,but no further acidification was observed.There was no close relationship between pH variation, available P concentration in larch rhizosphere.

中图分类号:

S714.8

张彦东, 白尚斌, 王政权, 王庆成. 落叶松根际土壤磷的有效性研究[J]. 应用生态学报, 2001, (1): 31-34.

ZHANG Yandong, BAI Shangbin, WANG Zhengquan, WANG Qingcheng . Soil P availability in larch rhizosphere[J]. Chinese Journal of Applied Ecology, 2001, (1): 31-34.

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