Impact of elevated temperatures on greenhouse gas emissions in rice systems: interaction with straw incorporation studied in a growth chamber experiment

Autor:	Reiner Wassmann, Gina Villegas-Pangga, Yam Kanta Gaihre
Rok vydání:	2013
Předmět:	Chemistry Global warming food and beverages Soil Science Plant physiology Plant Science Nitrous oxide Straw Methane chemistry.chemical_compound Agronomy Yield (chemistry) Greenhouse gas Paddy field
Zdroj:	Plant and Soil. 373:857-875
ISSN:	1573-5036 0032-079X
DOI:	10.1007/s11104-013-1852-4
Popis:	Two pot experiments in a “walk-in” growth chamber with controlled day and night temperatures were conducted to investigate the influence of elevated temperatures along with rice straw incorporation on methane (CH4) and nitrous oxide (N2O) emissions as well as rice yield. Three temperature regimes–29/25, 32/25, and 35/30 °C (Exp. I) and 29/22, 32/25, and 35/28 °C (Exp. II), representing daily maxima/minima were used in the study. Two amounts of rice straw (0 and 6 t ha−1) were applied with four replications in each temperature regime. CH4 and N2O emissions as well as soil redox potential (Eh) were monitored weekly throughout the rice-growing period. Elevated temperatures increased CH4 emission rates, with a more pronounced effect from flowering to maturity. The increase in emissions was further enhanced by incorporation of rice straw. A decrease in soil Eh to
Databáze:	OpenAIRE
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