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Titolo:
Soil bacterial functional diversity in a potato field
Autore:
Lahav, I; Steinberger, Y;
Indirizzi:
Bar Ilan Univ, Fac Life Sci, IL-52900 Ramat Gan, Israel Bar Ilan Univ Ramat Gan Israel IL-52900 Sci, IL-52900 Ramat Gan, Israel
Titolo Testata:
EUROPEAN JOURNAL OF SOIL BIOLOGY
fascicolo: 1, volume: 37, anno: 2001,
pagine: 59 - 67
SICI:
1164-5563(200101/03)37:1<59:SBFDIA>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
MICROBIAL BIOMASS; DESERT SOIL; RHIZOSPHERE; COMMUNITIES; SYSTEMS;
Keywords:
agroecosystem; bacterial community; diversity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Steinberger, Y Bar Ilan Univ, Fac Life Sci, IL-52900 Ramat Gan, Israel BarIlan Univ Ramat Gan Israel IL-52900 Ramat Gan, Israel
Citazione:
I. Lahav e Y. Steinberger, "Soil bacterial functional diversity in a potato field", EUR J SOIL, 37(1), 2001, pp. 59-67

Abstract

Nutrient availability of plants varies according to different processes governed by soil biota. In agroecosystems, human intervention may affect soilbiota and therefore: it has a crucial impact on system productivity and its maintenance. Based on the above information, we assumed that sequencing bacterial functional diversity in agrosystems will be affected by plant growing stages and human activity (agricultural practice). During the study period, soil samples comprising five cores (5 cm diameter) from upper (0 to 10cm) and deeper (10 to 20 cm) layers were collected individually from a potato field and from a control site with zero input treatment. Soil moisture,total organic carbon and bacterial functional diversity were assessed. Theresults obtained from the field and laboratory studies demonstrate differences between growing stages. The percentage of soil moisture content rangedbetween 10-12% during the study period, independent of depth, location (treatment and control) and growth stage, whereas total organic carbon (TOC) oscillated between 0.15-0.35%. Soil microbial biomass (SMB) measured in the upper layer (0 to 10 cm) increased from values of 100 mug C.g(-1) soil before planting to 190 mug C.g(-1) soil after yield harvesting, and in the deepsoil layer (10 to 20 cm) a mean value of 80 mug C.g(-1) soil was obtained. Bacterial functional diversity (BFD) was evaluated using the Biolog method. Values of Shannon diversity H' = 16.10(-2) obtained in the upper layer during the pre-planting stage decreased to H' = 5.10(-2) after planting. At the deep layer (10 to 20 cm), similar trends to those measured in the upper layer (0 to 10 cm) were obtained, except during the harvesting and post-harvesting seasons, when maximal values of H' = 30.10(-2) were detected. In this context, we tried to comprehend the dynamics of microbial community and the diversity of bacterial populations participating in key soil processes of agroecosystems. (C) 2001 Editions scientifiques et medicales Elsevier SAS.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 19:16:08