Microbial community composition and substrate use in a highly weathered soil as affected by crop rotation and P fertilization

被引：109

作者：

Bünemann, E.K. ^{[1
]}

Bossio, D.A. ^{[2
,3
]}

Smithson, P.C. ^{[2
,4
]}

Frossard, E. ^{[1
]}

Oberson, A. ^{[1
]}

机构：

[1] Institute of Plant Sciences, Swiss Fed. Inst. of Technol. Zurich, CH-8315 Lindau

[2] Intl. Ctr. for Res. in Agroforestry, Nairobi

[3] Intl. Water Management Institute, Colombo

[4] Berea College, CPO 2064, Berea

来源：

Soil Biology and Biochemistry | 2004年 / 36卷 / 06期

关键词：

Carbon; Nitrogen; Phospholipid fatty acid; Phosphorus; Plant residues; Soil microbial biomass; Tropical soil;

D O I：

10.1016/j.soilbio.2004.02.002

中图分类号：

学科分类号：

摘要：

A better understanding of soil microbial processes is required to improve the synchrony between nutrient release from plant residues and crop demand. Phospholipid fatty acid analysis was used to investigate the effect of two crop rotations (continuous maize and maize-crotalaria rotation) and P fertilization (0 and 50 kg Pha-1yr-1, applied as triple superphosphate) on microbial community composition in a highly weathered soil from western Kenya. Microbial substrate use in soils from the field experiment was compared in incubation experiments. Higher levels of soil organic matter and microbial biomass in the maize-crotalaria rotation were connected with higher total amounts of phospholipid fatty acids and an increase in the relative abundances of indicators for fungi and gram-negative bacteria. P fertilization changed the community profile only within the continuous maize treatment. The decomposition of glucose, cellulose and three plant residues (all added at 2.5 g Ckg -1 soil) proceeded faster in soil from the maize-crotalaria rotation, but differences were mostly transient. Microbial P and N uptake within one week increased with the water-soluble carbon content of added plant residues. More P and N were taken up by the greater microbial biomass in soil from the maize-crotalaria rotation than from continuous maize. Re-mineralization of nutrients during the decline of the microbial biomass increased also with the initial biological activity of the soil, but occurred only for a high quality plant residue within the half year incubation period. Compared to the effect of crop rotation, P fertilization had a minor effect on microbial community composition and substrate use. © 2004 Elsevier Ltd. All rights reserved.

引用

页码：889 / 901

页数：12

共 41 条

[1]

Alef K., Soil respiration, Methods in Applied Soil Microbiology and Biochemistry, pp. 214-219, (1995)

[2]

Anderson J.M., Ingram J.S.I., Tropical Soil Biology and Fertility. a Handbook of Methods, (1993)

[3]

Anderson J.P.E., Domsch K.H., A physiological method for the quantitative measurement of microbial biomass in soils, Soil Biology & Biochemistry, 10, pp. 215-221, (1978)

[4]

Beguin P., Aubert J.-P., The biological degradation of cellulose, FEMS Microbiology Reviews, 13, pp. 25-58, (1994)

[5]

Bligh E.G., Dyer W.J., A rapid method of total lipid extraction and purification, Canadian Journal of Biochemistry and Physiology, 37, pp. 911-917, (1959)

[6]

Bossio D.A., Scow K.M., Impacts of carbon and flooding on soil microbial communities: Phospholipid fatty acid profiles and substrate utilization patterns, Microbial Ecology, 35, pp. 265-278, (1998)

[7]

Bossio D.A., Scow K.M., Gunapala N., Graham K.J., Determinants of soil microbial communities: Effects of agricultural management, season, and soil type on phospholipid fatty acid profiles, Microbial Ecology, 36, pp. 1-12, (1998)

[8]

Ter Braak C.J.F., Data Analysis in Community and Landscape Ecology, pp. 91-169, (1987)

[9]

Ter Braak C.J.F., CANOCO: A Fortran Program for Cannonical Community Ordination: Update Notes, (1990)

[10]

Bunemann E.K., Smithson P.C., Jama B., Frossard E., Oberson A., Maize productivity and nutrient dynamics in maize-fallow rotations in western Kenya, Plant and Soil, (2004)

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