Earthworms (Millsonia anomala, Megascolecidae) do not increase rice growth through enhanced nitrogen mineralization

被引：46

作者：

Blouin, M. ^{[1
]}

Barot, S. ^{[1
]}

Lavelle, P. ^{[1
]}

机构：

[1] IRD, UMR 137, LEST, F-93143 Bondy, France

来源：

SOIL BIOLOGY & BIOCHEMISTRY | 2006年 / 38卷 / 08期

关键词：

earthworm; mechanisms affecting plant growth; mineralization; nitrogen gradient;

D O I：

10.1016/j.soilbio.2005.12.023

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Earthworms have been shown to increase plant growth in 75% of the experiments that have compared plant growth in their presence and absence. However, the relative importance of the different mechanisms advanced to explain such a stimulatory effect has never been tested. In a laboratory experiment, we observed increased growth of rice plants in the presence of earthworms (Millsonia anomala, Megascolecidae) and demonstrated that enhanced nitrogen release (generally considered as the principal mechanism involved in earthworm positive effect on plants) was not responsible for this result: earthworms had the same stimulatory effect on plant growth (+ 20%) irrespective of whether the soil (provided with different amounts of mineral-N fertilizer) was either N-limited or N-saturated. We discuss alternative explanations for the observed variations in rice production. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：2063 / 2068

页数：6

共 39 条

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