Summary
Two different soils were amended with 14C-labelled plant material and incubated under controlled laboratory conditions for 2 years. Half the samples were cropped with wheat (Triticum aestivum) 10 times in succession. At flowering, the wheat was harvested and the roots removed from the soil, and a new crop was started. Thus, the soil was continuously occupied by predominantly active root systems. The remaining samples were maintained without plants under the same conditions. The aim of the experiment was to study the effects of active roots on C-mineralization rates during different stages of decomposition and during long-term incubation. During the first 200 days, corresponding to the active decomposition stages, the roots weakly reduced 14C mineralization. With a lower level of decomposition, when more than 60% of the initial 14C was mineralized and when the available nutrients were markedly exhausted by plant uptake, the roots stimulated 14C mineralization.[/ p]
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References
Billes G, Bottner P (1981) Effet des racines vivantes sur la décomposition d'une litière racinaire marquée au 14C. Plant Soil 62:193–208
Billes G, Gandais-Riollet N, Bottner P (1986) Effet d'une culture de graminées sur la décomposition d'une litière végétale marquée au 14C et 15N dans le sol en conditions controlées. Oecol Plant 7:273–286
Bottner P, Warembourg F (1976) Method for simultaneous measurement of total and radioactive carbon in soils, soil extracts and plant materials. Plant Soil 45:273–277
Bottner P, Sallih Z, Billes G (1988) Root activity and carbon metabolism in soils. Biol Fertil Soil 7:71–78 CPCS (1967) Classification des sols. AFES, 78370 PLAISIR
Fuhr F, Sauerbeck DR (1968) Decomposition of wheat straw in the field as influenced by crossing and rotation: Isotopes and radiation in soil organic matter studies. IAEA, Vienna, pp 241–250
Helal HM, Sauerbeck DR (1982) Der Kohlenstoffumsatz von Pflanzenwurzeln and dessen Einfluss auf den Boden. Posterdarstellung Deutsch. Bot Gesellschaft, Freiburg
Helal HM, Sauerbeck DR (1984) Influence of plant roots on C and P metabolism in soil. Plant Soil 76:175–182
Helal HM, Sauerbeck DR (1986) Influence of plant roots on the stability of soil organic matter and of soil aggregates. In Trans XIII ISSS Congr, 3:776–777 ISSS, Hamburg
Jenkinson DS (1977) Studies on decomposition of plant material in soil: IV. The effect of the rate of addition. J Soil Sci 28:471–423
Reid JB, Goss MJ (1982) Suppression of decomposition of 14C-la-belled plant roots in the presence of living roots of maize and perennial ryegrass. J Soil Sci 33:387–395
Reid JB, Goss MJ (1983) Growing crops and transformations of 14C-labelled soil organic matter. Soil Biol Biochem 15:687–691
Shields JA, Paul EA (1973) Decomposition of C-labelled plant material under field conditions. Can, J Soil Sci 53:297–306
Sparling GS, Chechire MV, Mundic CM (1982) Effect of barley plants on the decomposition of 14C-labelled soil organic matter. J Soil Sci 33:89–100
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Sallih, Z., Bottner, P. Effect of wheat (Triticum aestivum) roots on mineralization rates of soil organic matter. Biol Fert Soils 7, 67–70 (1988). https://doi.org/10.1007/BF00260735
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DOI: https://doi.org/10.1007/BF00260735