Mineralization of plant residues of different nitrogen content in soil
1993
Diatta, J.B. | Grzebisz, W. | Wyrwa, P. (Akademia Rolnicza, Poznan (Poland). Katedra Chemii Rolnej)
The effect of winter wheat seedlings on decomposition of leaves of radish, beet, oak, linden and stems of radish in a 7 weeks period was studied. Cummulative sum of evolved CO2 in 14 days periods, N mineral and N easily available from organic N and organic C were measured. A total amount of CO2 evolved during 14 days and total nitrogen in the soil were highly dependent on the initial N content in incubated plant residues. As a result of plant incorporation into soil the rate of decomposition of plant residues increased. Living roots have stabilized soil organic matter content in treatments with plant residues relatively poor in initial N. Died roots have hampered the "priming effect" of leaves of radish rich in initial N
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