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Soil respiration under different N fertilization and irrigation regimes in Bengaluru, S-India

dc.date.accessioned2023-12-01T13:24:43Z
dc.date.available2023-12-01T13:24:43Z
dc.date.issued2023-09-15
dc.identifierdoi:10.17170/kobra-202311309138
dc.identifier.urihttp://hdl.handle.net/123456789/15253
dc.description.sponsorshipGefördert im Rahmen des Projekts DEALger
dc.description.sponsorshipDeutsche Forschungsgemeinschaft (Grant Number 279374797), Department of Biotechnology, Ministry of Science and Technology, India (Grant Number FOR2432)eng
dc.language.isoeng
dc.rightsNamensnennung 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectCO₂ emissioneng
dc.subjectintensificationeng
dc.subjectlinear mixed modeleng
dc.subjectseasonal soil respirationeng
dc.subject.ddc500
dc.subject.ddc570
dc.titleSoil respiration under different N fertilization and irrigation regimes in Bengaluru, S-Indiaeng
dc.typeAufsatz
dcterms.abstractRapid urbanization in many countries of the Global South has led to intensification of urban and peri-urban agriculture (UPA) whose effects on the soils’ physical, chemical, and microbial properties have been hardly studied. We therefore investigated the effects of different intensity levels, exemplified by three rates of mineral nitrogen (N) addition and irrigation on CO₂ emissions in typical crops during the wet (Kharif) and dry (Rabi) season on a Nitisol in Bengaluru, S-India. Respiration data were collected from 2017 to 2021 in two two-factorial split-plot experiments conducted under rainfed and irrigated conditions. Test crops were maize (Zea mays L.), finger millet (Eleusine coracana Gaertn.), and lablab (Lablab purpureus L. Sweet) under rainfed and irrigated conditions, as well as the vegetables cabbage (Brassica oleracea var. capitata), eggplant (Solanum melongena L.), and tomato (Solanum lycopersicum L.) or chili (Capsicum annuum L.). Carbon dioxide (CO₂) emissions were determined using a Los Gatos Research (LGR) multi-gas analyzer whereby under our study conditions CH₄, NH₃ and N₂O were negligible. Measurements were conducted from 7:00 am to 11:30 am and repeated from 12:30 pm to 6:00 pm. Irrespective of irrigation, season, crops and N fertilizer level, CO₂ emission rates during afternoon hours were significantly higher (2–128%) than during morning hours. In the irrigated field diurnal emission differences between afternoon and morning hours ranged from 0.04 to 1.61 kg CO₂-C ha−¹ h−¹ while in the rainfed field they averaged 0.20–1.78 kg CO₂-C ha−¹ h−¹. Irrespective of crops, in the rainfed field CO₂ emissions in high N plots were 56.4% larger than in low N plots whereas in the irrigated field they were only 12.1% larger. The results of a linear mixed model analysis indicated that N fertilization enhanced CO₂ emissions whereby these effects were highest in rainfed crops. Soil moisture enhanced emissions in rainfed crops but decreased them under irrigation where crop-specific CO₂ emissions within a season were independent of N application. Soil temperature at 5 cm depth enhanced CO₂ emissions in both fields. Overall, higher N and soil temperature enhanced CO₂ fluxes whereas effects of soil moisture depended on irrigation.eng
dcterms.accessRightsopen access
dcterms.creatorSourav, Suman Kumar
dcterms.creatorSubbarayappa, Chickadibburahalli Thimmappa
dcterms.creatorChowdappa, Hanumanthappa Dimba
dcterms.creatorMudalagiriyappa
dcterms.creatorVazhacharickal, Prem Jose
dcterms.creatorMock, Andrea
dcterms.creatorIngold, Mariko
dcterms.creatorBürkert, Andreas
dc.relation.doidoi:10.1007/s10705-023-10311-y
dc.relation.projectidGrant Number 279374797, Grant Number FOR2432
dc.subject.swdIndienger
dc.subject.swdBangaloreger
dc.subject.swdPhysikochemische Bodeneigenschaftger
dc.subject.swdBodenatmungger
dc.subject.swdKohlendioxidemissionger
dc.subject.swdIntensivierungger
dc.subject.swdLineares Modellger
dc.subject.swdGemischtes Modellger
dc.type.versionpublishedVersion
dcterms.source.identifiereissn:1573-0867
dcterms.source.issueIssue 3
dcterms.source.journalNutrient Cycling in Agroecosystemseng
dcterms.source.pageinfo333-345
dcterms.source.volumeVolume 127
kup.iskupfalse


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