Effect of bio-organic fertilizers on seasonal changes of inorganic nitrogen forms in the soil under winter wheat | Vplyv bio-organických hnojív na sezónne zmeny anorganických foriem dusíka v pôde pod pšenicou letnou f. ozimnou
2011
Sovišová, M., Slovak Univ. of Agriculture in Nitra (Slovak Republic). Faculty of agrobiology and food resources, Department of zoology and environmentalism and zoology | Ondrišík, P.
The experiment was conducted during the growing season 2007/8 and 2008/2009 in an experimental field. The effect of bio-organic fertilizers Condit Mineral and Condit Eco on the dynamics of inorganic nitrogen in the soil under winter wheat was investigated. The soil was sampled monthly from two sampling depths (0.0-0.3 m and 0.3-0.6 m). In these samples, we determined the contents of inorganic nitrogen forms in 1% solution of K2SO4, by using the colour method. Changes in inorganic nitrogen forms were observed in connection with several variables as the sampling depth, sampling date content and others. The higher contents of N-NH4+ were determined in the first year (2007/2008), the average content of N-NH4+ in this year was 6.657 mg per kg and the higher contents of nitrate nitrogen were determinate in the second year (2008/2009), the average content of N-NO3- in this year was 6.681 mg per kg, the average content of N-NO3- was 5.78 mg per kg. The results of experiment confirmed that the greater dependence on the dynamics of inorganic nitrogen in the soil had climate conditions during the growing season than the applied fertilizers. Differences between fertilized treatments were statistically no-significant. The higher content of inorganic nitrogen was in the autumn under Condit Mineral fertilizer application.
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