Effect of long-term artificial fertilisation on readily available element content of a meadow chernozem soil and on chemical composition of winter wheat yield

Abstract

further examination is a very important task of the recent agro-chemistry research as well. Long-term fertilisation experiments form an important basis of these researches and provide results which are important for the development and the application of sort- and site specific fertilisation technologies. The National Uniformed Long-Term Fertilisation Experiments (NULTFE) carried out in 9 experimental sites of Hungary has a significant role in the sustainable development of crop management systems. The obtained results related to changes of soil parameters and nutrient availability were summarized by DEBRECZENINE et al. (2003), KISMANYOKI et al. (2003), BLASK.6 and ZSIGRA1 (2003), HOLLO (2003), BLASKO et al. (2003), and by HOLLO and KADAR (2003). During our work the effects of long-term fertilisation on the readily available element content of the soil and on the chemical composition of winter wheat yield were examined. The correlations between the readily available element content of the soil and the nutrient content of the grain were studied in order to evaluate the impact of different nutrient supplies on the chemical composition of the grain as well. Methods The effect of N and P fertilisation on the readily available element content of the soil and on the chemical composition of winter wheat yield was tested on a meadow chernozem soil solonetzic in the deeper layers at Karcag in 2004. The experiment was carried out in the framework of the NULTFE with the winter wheat variety Mv Csardas. Eighteen fertilisation treatments with 4 replications were evaluated. The applied fertiliser doses were published previously in the following papers: ZSIGRAI (1999, 2001/ The net size of the plots was about 50 m-2. We applied a conventional crop production technology during the vegetation period. The crop samples were taken from the harvested yield at the time of harvest and after that the soil samples. After the preparation of the soil samples, pII(H20), pH(KCl), humus content, AL-soluble P2O5, K20, potential acidity (yl), NH4-N, NO3+NO2-N, Na-, Mg-, Cu-, Zn- and Mn-contents were determined according to the relevant standards (MSZ-08-0206-2, MSZ 20135). We measured the total N-, P2O5-, K2O-, Ca-, Mg-, Cu-, Mn-, Fe-, Zn-contents of the crop samples as well. The experimental data were processed with the statistical methods of MANOVA, linear and polynomial regression analyses. Results and discussion During the analysis of the effect of regular artificial fertilisation on the readily available