APPROACHES TO MEASURING THE CONTRIBUTION OF NEMATODES AND PROTOZOA TO NITROGEN MINERALIZATION IN THE RHIZOSPHERE

被引：14

作者：

GRIFFITHS, BS

机构：

[1] Soil-Plant Dynamics Group, Scottish Crop Research Institute, Dundee, DD2 5DA, Invergowrie

来源：

SOIL USE AND MANAGEMENT | 1990年 / 6卷 / 02期

关键词：

D O I：

10.1111/j.1475-2743.1990.tb00812.x

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Abstract. Nematodes and protozoa assist nitrogen mineralization by consuming bacteria, and this may increase the amount of nitrogen taken up by plants so that it exceeds the amount lost by root exudation. One of the methods used to determine bacterial consumption by protozoan grazers in aquatic ecosystems, namely progressive dilution of the grazing pressure, was tested in a sandy soil. The result suggests that a basic assumption of the technique, that grazing is directly proportional to the dilution factor, is untrue for soils, possibly because the increase in moisture content with increasing dilution enhances grazer activity. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：88 / 90

页数：3

共 10 条

[1]

Acea M.J., Alexander M., Growth and survival of bacteria introduced into carbon‐amended soils, Soil Biology and Biochemistry, 20, pp. 703-709, (1988)

[2]

Clarholm M., Possible roles for roots, bacteria, protozoa and fungi in supplying nitrogen to plants, Ecological Interactions in Soil, pp. 355-365, (1985)

[3]

Frey J.S., McClellan J.F., Ingham E.R., Coleman D.C., Filter‐out‐grazers (FOG): A filtration experiment for separating protozoan grazers in soil, Biology and Fertility of Soils, 1, pp. 73-79, (1985)

[4]

Griffiths B.S., Mineralization of nitrogen and phosphorus by mixed cultures of the ciliate protozoan Colpoda steinii, the nematode Rhabdlitis sp. and the bacterium Pseudomonas fluorescent, Soil Biology and Biochemistry, 18, pp. 637-641, (1986)

[5]

Griffiths B.S., A comparison of microbial feeding nematodes and protozoa in the rhizosphere of different plants, Biology and Fertility of Soils, 9, pp. 83-88, (1990)

[6]

Ingham R.E., Trofymow J.A., Ingham E.R., Colkman D.C., Interactions of bacteria, fungi and their nematode grazers: effects on nutrient cycling and plant growth, Ecological Monographs, 55, pp. 119-140, (1985)

[7]

Robinson D., Griffiths B.S., Ritz K., Wheatley R.K., Root induced nitrogen mineralization: a theoretical analysis, Plant and Soil, 117, pp. 185-193, (1989)

[8]

Sanders R.W., Porter K.G., Use of metabolic inhibitors to estimate zooplankton grazing and bacterial production in a monomictic eutrophic lake with an anaerobic hypolimnion, Applied and Environmental Microbiology, 52, pp. 101-107, (1986)

[9]

Tremaine S.C., Mills A.L., Tests of the critical assumptions of the dilution method for estimating hacterivory by microcucarvotes, Appl Environ Microbiol, 53, pp. 2914-2924, (1987)

[10]

Wright R.T., Coffin R.B., Measuring microplankton grazing on marine bacteria by its impact on bacterial production, Microbial Ecology, 10, pp. 137-149, (1984)

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