Soybean root respiration assessed from short-term 14C-activity changes

During and immediately after labelling of soybeans (Glycine max. L.) in the field by exposure to ¹⁴CO₂, its respiratory deposit into the soil atmosphere, and its liberation from the soil were used in conjunction with estimates of below-ground plant biomass to apportion total soil respiration. Root r...

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Veröffentlicht in:	Plant and soil 1989-07, Vol.117 (2), p.301-303
Hauptverfasser:	Wagner, G.H. (Missouri Univ., Columbia, MO (USA). Dept. of Agronomy), Buyanovsky, G.A
Format:	Artikel
Sprache:	eng
Schlagworte:	Agricultural soils Agronomy. Soil science and plant productions Biological and medical sciences Carbon CARBON DIOXIDE Chemical, physicochemical, biochemical and biological properties DIOXIDO DE CARBONO DIOXYDE DE CARBONE Economic plant physiology Fundamental and applied biological sciences. Psychology GLYCINE MAX ISOTOPE LABELLING MARCACION CON ISOTOPOS MARQUAGE ISOTOPIQUE Metabolism Net assimilation, photosynthesis, carbon metabolism. Photorespiration, respiration, fermentation (anoxia, hypoxia) Nutrition. Photosynthesis. Respiration. Metabolism Organic matter Photosynthesis, respiration. Anabolism, catabolism Physics, chemistry, biochemistry and biology of agricultural and forest soils Plant physiology and development Plant roots Plants RACINE Radiocarbon RAICES RESPIRACION RESPIRATION ROOTS Short communications Silt loam soils Soil air Soil respiration Soil science Soybeans Vegetation canopies
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Beschreibung
Zusammenfassung:	During and immediately after labelling of soybeans (Glycine max. L.) in the field by exposure to ¹⁴CO₂, its respiratory deposit into the soil atmosphere, and its liberation from the soil were used in conjunction with estimates of below-ground plant biomass to apportion total soil respiration. Root respiration of soybean plants at stage V₆ was estimated at 4mg CO₂.(g root)⁻¹.h⁻¹. Soil biota, during the same time, contributed 35% of total soil respiration.
ISSN:	0032-079X 1573-5036