A szervetlen-C és a szerves-C mennyiségének változása egy homoktalajban, meszezés hatására
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Folyóirat címe
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Kötet címe (évfolyam száma)
Kiadó
Faculty of Agricultural and Food Sciences and Enviromental Management of the Debrecen University, Debrecen.
Absztrakt
Leírás
The effect of liming on different organic and inorganic carbon forms in soil was studied in a pot experiment on acidic sandy soil (pH(H2O)=4.38; pH(KCl)=3.42). We used three kinds of liming doses (which were signed M1, M2, M3,). M1 was half of the M2 dose; M2 was the calculated lime dose and M3 was one and the half dose of M2. Lime (CaCO3) was mixed into the soil in powdery form. In addition to liming treatments, a uniform N, P and K treatment (1-1-1g N, P2O5 and K2O per pot) was given. Water supply was set up to 75% field water capacity of soil. Pots were watered daily. During the vegetation period soil and plant (oats; Avena sativa L.) samples were taken from each treatment three times (after 6-10-15 weeks). We determined inorganic- and total-C of the soil by Vario EL element analyser (based on dry combustion method) and calculated the organic-C.The conclusions can be summarized as follows:– Liming treatments had a significant positive effect on the soil-pH and caused quantitative change of different carbon forms of soil.– Increasing tendency of liming doses caused more intensive changes in inorganic- and organic-C forms of soil.– A significant correlations was found between the soil pH and the inorganic-C fraction of soil.– A decreasing correlation was found between the vegetation period and the organic-C fraction.