Datum
2019-07-23Autor
Khanal, GunadhishWachendorf, ChristineDittert, KlausWillich, MelanieDietz, HerbertBürkert, AndreasIngold, MarikoSchlagwort
570 Biowissenschaften, Biologie 580 Pflanzen (Botanik) Stickstoff-15OaseLandwirtschaftOrganisches DüngemittelStickstoffversorgungMetadata
Zur Langanzeige
Aufsatz
Nitrogen turnover in a repeatedly manured arid subtropical soil: Incubation studies with 15N isotopes
Zusammenfassung
Under the hot and moist conditions of irrigated agriculture in the arid subtropics, turnover of organic matter is high, which can lead to considerable carbon (C) and nitrogen (N) losses. Therefore, sustainable use of these soils requires regular manure application at high rates. To investigate the contribution of consecutive manure applications to an arid sandy soil to various soil N pools, goat manure was isotopically labeled by feeding 15N‐enriched Rhodes grass hay and applied to the soil during a two‐year field experiment. In the first year, soils received 15N‐labeled manure to distinguish between soil‐derived and manure‐derived N. In the second year, these plots were split for the application of either 15N‐labeled or unlabeled manure to discriminate N derived from previous (first year) and recent (second year) manure application. Soil samples (of control and 15N‐manured soil) were collected at the end of the first and the second year, and incubated in two laboratory experiments with labeled or unlabeled manure. At the beginning of Experiment 1, 7% of total N, 11% of K2SO4 extractable N, and 16% of microbial biomass N were derived from previously field‐applied manure. While the application of manure during incubation increased microbial biomass N by 225% and 410% in the control soil and the previously field‐manured soil, respectively, N2O emissions were more affected on the control soil, releasing considerable amounts of the soil N‐pool (80% of total emissions). In Experiment 2, 4% of total N, 7% of K2SO4 extractable N, and 7% of microbial biomass N derived from previously applied manure, and 4%, 8%, and 3% from recently applied manure, respectively. Microbial biomass N and N2O‐N derived from manure declined with time after manure application, whereas in Experiment 1 this tendency was only observed for microbial biomass N.
Zitierform
In: Journal of Plant Nutrition and Soil Science (JPNSS) Volume 182 / Issue 5 (2019-07-23) , S. 836-845 ; EISSN 1522-2624Förderhinweis
Gefördert im Rahmen des Projekts DEALZitieren
@article{doi:10.17170/kobra-202011182197,
author={Khanal, Gunadhish and Wachendorf, Christine and Dittert, Klaus and Willich, Melanie and Dietz, Herbert and Bürkert, Andreas and Ingold, Mariko},
title={Nitrogen turnover in a repeatedly manured arid subtropical soil: Incubation studies with 15N isotopes},
journal={Journal of Plant Nutrition and Soil Science (JPNSS)},
year={2019}
}
0500 Oax 0501 Text $btxt$2rdacontent 0502 Computermedien $bc$2rdacarrier 1100 2019$n2019 1500 1/eng 2050 ##0##http://hdl.handle.net/123456789/12064 3000 Khanal, Gunadhish 3010 Wachendorf, Christine 3010 Dittert, Klaus 3010 Willich, Melanie 3010 Dietz, Herbert 3010 Bürkert, Andreas 3010 Ingold, Mariko 4000 Nitrogen turnover in a repeatedly manured arid subtropical soil: Incubation studies with 15N isotopes / Khanal, Gunadhish 4030 4060 Online-Ressource 4085 ##0##=u http://nbn-resolving.de/http://hdl.handle.net/123456789/12064=x R 4204 \$dAufsatz 4170 5550 {{Stickstoff-15}} 5550 {{Oase}} 5550 {{Landwirtschaft}} 5550 {{Organisches Düngemittel}} 5550 {{Stickstoffversorgung}} 7136 ##0##http://hdl.handle.net/123456789/12064
2020-12-02T11:10:00Z 2020-12-02T11:10:00Z 2019-07-23 doi:10.17170/kobra-202011182197 http://hdl.handle.net/123456789/12064 Gefördert im Rahmen des Projekts DEAL eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ 15N‐labeled manure C and N turnover oasis agriculture repeated manure application 570 580 Nitrogen turnover in a repeatedly manured arid subtropical soil: Incubation studies with 15N isotopes Aufsatz Under the hot and moist conditions of irrigated agriculture in the arid subtropics, turnover of organic matter is high, which can lead to considerable carbon (C) and nitrogen (N) losses. Therefore, sustainable use of these soils requires regular manure application at high rates. To investigate the contribution of consecutive manure applications to an arid sandy soil to various soil N pools, goat manure was isotopically labeled by feeding 15N‐enriched Rhodes grass hay and applied to the soil during a two‐year field experiment. In the first year, soils received 15N‐labeled manure to distinguish between soil‐derived and manure‐derived N. In the second year, these plots were split for the application of either 15N‐labeled or unlabeled manure to discriminate N derived from previous (first year) and recent (second year) manure application. Soil samples (of control and 15N‐manured soil) were collected at the end of the first and the second year, and incubated in two laboratory experiments with labeled or unlabeled manure. At the beginning of Experiment 1, 7% of total N, 11% of K2SO4 extractable N, and 16% of microbial biomass N were derived from previously field‐applied manure. While the application of manure during incubation increased microbial biomass N by 225% and 410% in the control soil and the previously field‐manured soil, respectively, N2O emissions were more affected on the control soil, releasing considerable amounts of the soil N‐pool (80% of total emissions). In Experiment 2, 4% of total N, 7% of K2SO4 extractable N, and 7% of microbial biomass N derived from previously applied manure, and 4%, 8%, and 3% from recently applied manure, respectively. Microbial biomass N and N2O‐N derived from manure declined with time after manure application, whereas in Experiment 1 this tendency was only observed for microbial biomass N. open access Khanal, Gunadhish Wachendorf, Christine Dittert, Klaus Willich, Melanie Dietz, Herbert Bürkert, Andreas Ingold, Mariko doi:10.1002/jpln.201800340 Stickstoff-15 Oase Landwirtschaft Organisches Düngemittel Stickstoffversorgung publishedVersion EISSN 1522-2624 Issue 5 Journal of Plant Nutrition and Soil Science (JPNSS) 836-845 Volume 182 false
Die folgenden Lizenzbestimmungen sind mit dieser Ressource verbunden: