Abstract
The aim of the research was determination the efficiency of application 50 t ha-1 digestate from the process of anaerobic digestion on the productivity of sorghum (Sorghum bicolor L.) on moderately degraded (calcic gleysol) and fertile (chernozem) agricultural land, in southern Banat, Republic of Serbia. In the field experiment during three years digestate amendment led to an increase in the number of leaves by 28.56% and plant height by 5.34%, which led to an increase in yield by 3.40%. The maximum yield was 2018 (41.74 DM t ha-1) on chernozem. The yield of sorghum was lower on calcic gleysol compared to chernozem by 5.43% and was in positive, medium and very significant dependence on precipitation (0.61) and in positive significant correlation with digestate (0.53) and plant height (0.59). Biogas yield reach 157.05 Nm3 t-1 (9582 Nm3 ha-1) on chernozem with digestate. Digestate had a statistically significant positive effect on all tested characteristics of sorghum as well as biogas yield during all three experimental years. The use of digestate as a by-product in the process of producing biogas based on silage of sorghum, allows the substitution of mineral fertilizers and remediation of damaged soil, which contributes to sustainability from the bio-economic and environmental aspects.
Highlights
The production and use of biogas as a renewable energy source, contribute to several goals of sustainable development (SDG): zero hunger, good health and well-being, gender equality, clean water and sanitation, affordable and clean energy, industry, innovation and infrastructure, sustainable cities and communities, climate action and life on land
Based on the analysis of variance, it can be concluded that the sorghum plant height very significantly affects locality (Fexp = 14.25 **), variant (Fexp = 12.36 **), and significantly affects year (Fexp = 0.73 *) and interaction VxL (Fexp = 0.83 *), YxL (Fexp = 0.73 *) and LxYxV (Fexp = 1.54 *)
The use of digestate as fertilizer on land on which the agri-energy crop is dedicated produced as raw materials for energy conversion in the process of anaerobic digestion leads to the decarbonisation of agriculture, the use of renewable energy sources and increasing the profitability of the biogas power plant
Summary
The production and use of biogas as a renewable energy source, contribute to several goals of sustainable development (SDG): zero hunger, good health and well-being, gender equality, clean water and sanitation, affordable and clean energy, industry, innovation and infrastructure, sustainable cities and communities, climate action and life on land. In order to achieve sustainability, it is necessary, in addition to the energy purposes, to fulfil the environmental characteristics of this process, primarily disposing of biological waste, Received: 13 Feb 2021. Received in revised form: 11 Mar 2021. From Volume 49, Issue 1, 2021, Notulae Botanicae Horti Agrobotanici Cluj-Napoca journal will use article numbers in place of the traditional method of continuous pagination through the volume. The journal will continue to appear quarterly, as before, with four annual numbers
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