Low soil water content during plant growth influences soil respiration and microbial biomass after plant removal and rewetting

The aim of this experiment was to study the effect of previous water content in planted and unplanted soil on microbial biomass and nutrient availability after plant removal and rewetting. A silt loam was maintained 10-50% of water holding capacity (WHC) and planted with wheat or left unplanted. Aft...

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Autores principales:	Xue,Ran, Shen,Yuying, Marschner,Petra
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2016
Materias:	Microbial biomass respiration planted soil water content
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162016000400008
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spelling	oai:scielo:S0718-951620160004000082017-03-07Low soil water content during plant growth influences soil respiration and microbial biomass after plant removal and rewettingXue,RanShen,YuyingMarschner,Petra Microbial biomass respiration planted soil water content The aim of this experiment was to study the effect of previous water content in planted and unplanted soil on microbial biomass and nutrient availability after plant removal and rewetting. A silt loam was maintained 10-50% of water holding capacity (WHC) and planted with wheat or left unplanted. After four weeks, plants were removed and soils were kept at the same water content as in the pots (original) or rewetted to 50% WHC (rewet). Then, soil respiration was measured continuously for 20 days, available N and P and microbial biomass C, N and P were measured on days 5, 10 and 20.In original soil, cumulative respiration, MBC and MBN decreased with water content in planted soil and were higher in planted than unplanted soil only at 30-50% WHC. Available N was up to 3-fold higher in un-planted than planted soil at 30-50% WHC. Only in planted soil, available N increased with decreasing water content. Rewetting increased cumulative respiration and MBN only in soil that had been at 10-20% WHC. In rewet soil, the previous water content had no effect on cumulative respiration, MBC and MBN in unplanted soil. In planted soil, cumulative respiration, MBC and MBN remained lower in soil that was at 10% WHC previously compared to that at 50% WHC. It is concluded that the effect of low water content on soil microbes is exacerbated by reduced plant growth and the reduced C input, even if soils are rewet.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.16 n.4 20162016-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162016000400008en10.4067/S0718-95162016005000068
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Microbial biomass respiration planted soil water content
spellingShingle	Microbial biomass respiration planted soil water content Xue,Ran Shen,Yuying Marschner,Petra Low soil water content during plant growth influences soil respiration and microbial biomass after plant removal and rewetting
description	The aim of this experiment was to study the effect of previous water content in planted and unplanted soil on microbial biomass and nutrient availability after plant removal and rewetting. A silt loam was maintained 10-50% of water holding capacity (WHC) and planted with wheat or left unplanted. After four weeks, plants were removed and soils were kept at the same water content as in the pots (original) or rewetted to 50% WHC (rewet). Then, soil respiration was measured continuously for 20 days, available N and P and microbial biomass C, N and P were measured on days 5, 10 and 20.In original soil, cumulative respiration, MBC and MBN decreased with water content in planted soil and were higher in planted than unplanted soil only at 30-50% WHC. Available N was up to 3-fold higher in un-planted than planted soil at 30-50% WHC. Only in planted soil, available N increased with decreasing water content. Rewetting increased cumulative respiration and MBN only in soil that had been at 10-20% WHC. In rewet soil, the previous water content had no effect on cumulative respiration, MBC and MBN in unplanted soil. In planted soil, cumulative respiration, MBC and MBN remained lower in soil that was at 10% WHC previously compared to that at 50% WHC. It is concluded that the effect of low water content on soil microbes is exacerbated by reduced plant growth and the reduced C input, even if soils are rewet.
author	Xue,Ran Shen,Yuying Marschner,Petra
author_facet	Xue,Ran Shen,Yuying Marschner,Petra
author_sort	Xue,Ran
title	Low soil water content during plant growth influences soil respiration and microbial biomass after plant removal and rewetting
title_short	Low soil water content during plant growth influences soil respiration and microbial biomass after plant removal and rewetting
title_full	Low soil water content during plant growth influences soil respiration and microbial biomass after plant removal and rewetting
title_fullStr	Low soil water content during plant growth influences soil respiration and microbial biomass after plant removal and rewetting
title_full_unstemmed	Low soil water content during plant growth influences soil respiration and microbial biomass after plant removal and rewetting
title_sort	low soil water content during plant growth influences soil respiration and microbial biomass after plant removal and rewetting
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162016000400008
work_keys_str_mv	AT xueran lowsoilwatercontentduringplantgrowthinfluencessoilrespirationandmicrobialbiomassafterplantremovalandrewetting AT shenyuying lowsoilwatercontentduringplantgrowthinfluencessoilrespirationandmicrobialbiomassafterplantremovalandrewetting AT marschnerpetra lowsoilwatercontentduringplantgrowthinfluencessoilrespirationandmicrobialbiomassafterplantremovalandrewetting
_version_	1714206541818626048

Low soil water content during plant growth influences soil respiration and microbial biomass after plant removal and rewetting

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