Long-term maize stalk retention reduces seedtime soil respiration

ABSTRACT Cropland soil respiration (Rs) is a major part of CO2 transportation between the atmosphere and terrestrial ecosystems. Stalk retention is an effective method to conduct sustainable agricultural development. However, the relationship between long-term maize (Zea mays L.) stalk retention and...

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Autores principales:	Jia,Honglei, Guo,Hui, Walsh,Michael J., Bennett,John, Zhang,Yu, Wang,Gang
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2018
Materias:	Carbon composition microbial abundance redundancy analysis soil fungi soil moisture soil temperature Zea mays.
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392018000300350
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spelling	oai:scielo:S0718-583920180003003502018-11-14Long-term maize stalk retention reduces seedtime soil respirationJia,HongleiGuo,HuiWalsh,Michael J.Bennett,JohnZhang,YuWang,Gang Carbon composition microbial abundance redundancy analysis soil fungi soil moisture soil temperature Zea mays. ABSTRACT Cropland soil respiration (Rs) is a major part of CO2 transportation between the atmosphere and terrestrial ecosystems. Stalk retention is an effective method to conduct sustainable agricultural development. However, the relationship between long-term maize (Zea mays L.) stalk retention and seedtime Rs is not yet fully understood; two experimental zones with the same management history were therefore chosen to conduct the comparative study. Rainfed maize monoculture was the only crop cultivated in the study site. One zone (CZ) was covered by 5639 kg ha-1 maize stalk residue (MSR) after harvesting, and the other zone (BZ) has been left bare since autumn 2000. Annual measurements with 10 replicates were conducted at seedtime in 2015, 2016, and 2017. Results showed that mean Rs was 4.11 and 4.99 (g CO2 g-1 soil h-1 for CZ and BZ, respectively. Compared with BZ, CZ soil moisture was higher, but its soil temperature was lower. Although soil microbial abundances in CZ and BZ had decreasing trends between two adjacent seedtimes, there was a nonsignificant decrease of actinomycetes (p > 0.1) and fungi (p > 0.1) in BZ. The mean percentages of alkyl-carbon (Alkyl-C) were 25.6% and 35.0% for CZ and BZ, respectively. Redundancy analyses (RDA) showed that decreasing soil temperature, soil fungi, Alkyl-C as well as increasing soil moisture could explain reduced Rs in CZ. Maize stalk retention reduces seedtime Rs, thus maize stalk retention might contribute to soil C sequestration.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.78 n.3 20182018-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392018000300350en10.4067/S0718-58392018000300350
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Carbon composition microbial abundance redundancy analysis soil fungi soil moisture soil temperature Zea mays.
spellingShingle	Carbon composition microbial abundance redundancy analysis soil fungi soil moisture soil temperature Zea mays. Jia,Honglei Guo,Hui Walsh,Michael J. Bennett,John Zhang,Yu Wang,Gang Long-term maize stalk retention reduces seedtime soil respiration
description	ABSTRACT Cropland soil respiration (Rs) is a major part of CO2 transportation between the atmosphere and terrestrial ecosystems. Stalk retention is an effective method to conduct sustainable agricultural development. However, the relationship between long-term maize (Zea mays L.) stalk retention and seedtime Rs is not yet fully understood; two experimental zones with the same management history were therefore chosen to conduct the comparative study. Rainfed maize monoculture was the only crop cultivated in the study site. One zone (CZ) was covered by 5639 kg ha-1 maize stalk residue (MSR) after harvesting, and the other zone (BZ) has been left bare since autumn 2000. Annual measurements with 10 replicates were conducted at seedtime in 2015, 2016, and 2017. Results showed that mean Rs was 4.11 and 4.99 (g CO2 g-1 soil h-1 for CZ and BZ, respectively. Compared with BZ, CZ soil moisture was higher, but its soil temperature was lower. Although soil microbial abundances in CZ and BZ had decreasing trends between two adjacent seedtimes, there was a nonsignificant decrease of actinomycetes (p > 0.1) and fungi (p > 0.1) in BZ. The mean percentages of alkyl-carbon (Alkyl-C) were 25.6% and 35.0% for CZ and BZ, respectively. Redundancy analyses (RDA) showed that decreasing soil temperature, soil fungi, Alkyl-C as well as increasing soil moisture could explain reduced Rs in CZ. Maize stalk retention reduces seedtime Rs, thus maize stalk retention might contribute to soil C sequestration.
author	Jia,Honglei Guo,Hui Walsh,Michael J. Bennett,John Zhang,Yu Wang,Gang
author_facet	Jia,Honglei Guo,Hui Walsh,Michael J. Bennett,John Zhang,Yu Wang,Gang
author_sort	Jia,Honglei
title	Long-term maize stalk retention reduces seedtime soil respiration
title_short	Long-term maize stalk retention reduces seedtime soil respiration
title_full	Long-term maize stalk retention reduces seedtime soil respiration
title_fullStr	Long-term maize stalk retention reduces seedtime soil respiration
title_full_unstemmed	Long-term maize stalk retention reduces seedtime soil respiration
title_sort	long-term maize stalk retention reduces seedtime soil respiration
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392018000300350
work_keys_str_mv	AT jiahonglei longtermmaizestalkretentionreducesseedtimesoilrespiration AT guohui longtermmaizestalkretentionreducesseedtimesoilrespiration AT walshmichaelj longtermmaizestalkretentionreducesseedtimesoilrespiration AT bennettjohn longtermmaizestalkretentionreducesseedtimesoilrespiration AT zhangyu longtermmaizestalkretentionreducesseedtimesoilrespiration AT wanggang longtermmaizestalkretentionreducesseedtimesoilrespiration
_version_	1714205379852763136

Long-term maize stalk retention reduces seedtime soil respiration

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