The changes of selected soil chemical parameters in the long-term cultivation of Arundo donax L. and Elymus elongatus Gaertner

Šoltysová, Božena and Danilovič, Martin and Porvaz, Pavol (2022) The changes of selected soil chemical parameters in the long-term cultivation of Arundo donax L. and Elymus elongatus Gaertner. ACTA AGRONOMICA ÓVÁRIENSIS, 63 (Ksz). pp. 100-123. ISSN 1416-647X

Preview

Text EPA03114_acta_agronomica_ovariensis_2022_ksz_100-123.pdf - Published Version Download (1MB) | Preview

Abstract

The changes of selected soil chemical parameters were observed in Gleyic Fluvisols. The field experiment was established with two energy crops (Arundo donax L., Elymus elongatus Gaertner). The energy crops were fertilized with phosphorus in rate 40 kg ha-1 and potassium in rate 60 kg ha-1 each year in spring. The nitrogen fertilization was not carried out. Soil samples were taken from depth from 0 to 0.3 m at the beginning of the experiment in the autumn 2012 and at the end of reference period in the autumn 2018. The development of selected soil parameters in the time series was evaluated by trend analysis. Land management conversion, from market crops to perennial energy crops cultivation, has influenced changes of selected soil chemical parameters. Since the establishment of the experiments, an increase in soil organic carbon in the monitored energy crops was found. The annual increase in carbon in the soil was 0.61 t ha-1 year-1 C for the Arundo and 0.98 t ha-1 year-1 C for the Elymus. At the same time, the same impact of the crops on content of total nitrogen, content of available phosphorus and potassium and soil reaction was found. Since the establishment of the experiments was found an increase in total nitrogen in the soil, too. The annual increase in total nitrogen in the soil was 115 kg ha-1 year-1 N for the Arundo and 102 kg ha-1 year-1 N for the Elymus. It was recorded that both cultivated crops decreased the soil reaction. The content of available phosphorus did not change significantly and the content of available potassium increased during the cultivation of Arundo and conversely, slightly decreased during the cultivation of Elymus. The exchange soil reaction decreased significantly during long-term cultivation of Arundo and Elymus by 0.28, resp. 0.17. The linear trends found in both energy crop indicate the carbon sequestration after conversion from conventional crop to energy crop cultivation. From the trend analysis of data in cultivated energy crop was found the significant increase of the total nitrogen in the soil and the significant decrease of the exchange soil reaction. The development trends of the content of selected soil parameters in energy crops, which was determined using a regression model expressed by the linear equation pointed out the assumed development of the given soil parameter.

Actions (login required)

Edit Item