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001-es BibID:	BIBFORM016028
Első szerző:	Kovács Györgyi (környezetgazdálkodási agrármérnök)
Cím:	Effects of soil cultivation systems on the factors of the soil carbon cycle / Kovács Györgyi, Őri Nóra, Tuba Géza
Dátum:	2010
Megjegyzések:	There have been in situ measurements aiming the determination of the CO2-emission of the soilsince 2002 in the complex soil cultivation experiment at Karcag. Contrary to our previous results and theliterature data, the highest values of CO2-emission were measured in the conventionally ploughed treatment.The main goal of these measurements was to determine the effect of soil cultivation technologies and certainagrotechnical elements on the factors of the soil carbon cycle. The changes in quality and quantity of theorganic material of the soil are monitored through laboratory examinations. The light absorption of the humussubstances extracted by different solvents (NaOH, NaF, hot water) was measured in the UV-VIS range. Theresults show the rates of the organic materials being at the different phases of humification. Any disturbanceby soil cultivation can partly mobilise the C-stock of the soil. Frequent ploughing, loosening etc. interveneinto the dynamics of the natural processes contributing to the C-loss of the soil by the accelerated aeration.This increased aeration results in the emission of greenhouse gases, changes the CO2 concentration andincreases the oxygen concentration, therefore the oxidative processes become dominant in the soil.Experimental data provided information about the length of the time period when CO2 emission increasingeffects of soil cultivation are observable. These data can characterise the resilience of ecosystems of arablelands.
Tárgyszavak:	Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény hazai lapban cultivation systems CO2-emission soil structure and moisture organic carbon humus matte
Megjelenés:	Növenytermelés. - 59 : Suppl. (2010), p. 37-40. -
További szerzők:	Tuba Géza (1973-) (agrármérnök, környezetgazdálkodási szakmérnők) Őri Nóra (1972-) (vegyész)
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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