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001-es BibID:	BIBFORM089869
Első szerző:	Jóvér János (környezetgazdálkodási agrármérnök)
Cím:	Evaluation of sweet sorghum (Sorghum bicolor) hybrids as bioenergy feedstocks in relation to climatic aspects / Jóvér János, Kovács Györgyi, Blaskó Lajos, Juhász Csaba, Kovács Elza
Dátum:	2020
ISSN:	2066-6276 2601-5676
Megjegyzések:	In this study, biomass yield and sugar content, and bioethanol potential of six sweet sorghum hybrids were considered to assess the potential role of the genotype in the performance of sorghum. Yield and sugar content values were investigated in relation to the climatic aspects according to the Ellenberg and the Pálfai drought indices, and the effect of drought on biomass yield and sugar content was evaluated to reveal the dominant factor determining the bioethanol yield. Results proved that sweet sorghum holds a significant potential in the semi-arid regions to enhance the amount of the produced bioethanol e.g. in the EU, even though, considering the climatic characteristics of each year, sometimes extreme differences have been found that had a significant impact on its production. However, considering the performance of the hybrids, significant differences were found for both the green yield (5.5 t ha-1) and the sugar content (0.79 Brix %) under similar weather conditions, but sugar content for any of the selected hybrids had no relationship with the drought indices, though, seasonal impact was proved. In contrary, biomass yield showed significant relationship with the Pálfai drought index, suggesting that annual water shortage results in lower sorghum yield in the investigated semi-arid region as the determinative factor. Hybrids of the sweet sorghum showed high but different biofuel potential under the same, extreme climatic conditions via their biomass production variation, thus their field specific experimental testing is advisable to find the best performing ones in this context.
Tárgyszavak:	Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk sweet sorghum hybrids bioethanol climatic conditions drought indices
Megjelenés:	Natural Resources and Sustainable Development. - 10 : 2 (2020), p. 164-174. -
További szerzők:	Kovács Györgyi (1980-) (környezetgazdálkodási agrármérnök) Blaskó Lajos (1947-) (agrármérnök) Juhász Csaba (1962-) (környezetgazdálkodási agrármérnök) Kovács Elza (1976-) (okleveles vegyész, angol-magyar szakfordító, anyagmérnök MSc)
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001-es BibID:	BIBFORM079169
Első szerző:	Jóvér János (környezetgazdálkodási agrármérnök)
Cím:	The influence of base temperature on sweet sorghum production in Hungary / Jóvér János, Blaskó Lajos, Kovács Györgyi, Tamás János
Dátum:	2019
ISSN:	2066-6276 2601-5676
Megjegyzések:	In order to reach the goal determined by the 2009/28/EU directive sorghum production for energy purposes can be an adequate method. Efficient sorghum production is based on the consideration of the climatic aspects. An advantage of sorghum is appearing in the field of drought tolerance. The foundation of sorghum's great drought tolerance is the high heat demand which must be fulfilled. The heat demand varies from 8 ?C to 15 ?C, so that based on the meteorological data recorded in the period of 1997-2016 the Effective Heat Unit varied between 627 ?C and 2097 ?C. Base temperature has a remarkable impact on the length of the vegetation period as well. Depending on this value the potential length of the vegetation period can vary from 123 days to 153 days. The sugar accumulation curve of a sorghum hybrid is also an important aspect of efficient bioethanol production where length of the vegetation period is an essential factor.
Tárgyszavak:	Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban base temperature heat unit sweet sorghum sugar accumulation bioethanol
Megjelenés:	Natural Resources and Sustainable Development. - 9 : 1 (2019), p. 41-49. -
További szerzők:	Blaskó Lajos (1947-) (agrármérnök) Kovács Györgyi (1980-) (környezetgazdálkodási agrármérnök) Tamás János (1959-) (környezetgazdálkodási agrármérnök)
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001-es BibID:	BIBFORM086416
Első szerző:	Kiss Nikolett Éva (Környezetgazdálkodási agrármérnök)
Cím:	Analysis of nutritional parameters of biogas slurry / Kiss Nikolett Éva, Tamás János, Gorliczay Edit, Gálya Bernadett, Nagy Attila, Jóvér János, Riczu Péter
Dátum:	2020
ISSN:	2066-6276
Megjegyzések:	Large amount of waste and by-products generated during livestock processes requires urgent treatment and disposal. The energy recovery of wastes and by-products can be a solution for the problem, since the biogas production is an obvious way of recovery. As a by-product of biogas production biogas slurry is produced and it is to be suitable for nutrient supply. The samples of the biogas slurry originate from the Nyírbátor Regional Biogas Plant. The plant is used for the disposal and recovery of plant residues, manure of cattle and poultry, poultry slaughterhouses and other animal wastes. The organic matter from the fermenter is separated. After separation, the dilute phase is transferred to the manure storage and the solid phase is transferred to a drying plant or composting plant. Aims of the study were the analysis of filtering efficiency of the separator, comparison of properties of the pre-separator and the separated fermentation residue, since the company wants to spread the biogas slurry to arable land and pasture in a frame of complex precision irrigation system. For this reason, the sampling points were planned to set both before and after separator processes. Samples were taken twelve times between February and June 2018. Among other properties, the dry matter content of the biogas slurry, C and N content, element content, pH, conductivity, biological and chemical oxygen demand were measured. Based on the element content and the N content, the biogas slurry is suitable for nutrient supply. The average dry matter content values of the samples show that the result of the separation process the dry matter content is significantly reduced (P<0.05). The salt content was very high in the samples both before and after separation. In order to prevent environmental stress, it is recommended to reduce the salt content before applying the biogas slurry.
Tárgyszavak:	Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk biogas slurry nutritional parameters separator precision irrigation
Megjelenés:	Natural Resources and Sustainable Development. - 10 : 1 (2020), p. 57-66. -
További szerzők:	Tamás János (1959-) (környezetgazdálkodási agrármérnök) Gorliczay Edit (1991-) (környezetgazdálkodási agrármérnök) Gálya Bernadett (1987-) (környezetgazdálkodási agrármérnök) Nagy Attila (1982-) (környezetgazdálkodási agrármérnök) Jóvér János (1988-) (környezetgazdálkodási agrármérnök) Riczu Péter (1986-) (környezetgazdálkodási agrármérnök)
Pályázati támogatás:	EFOP-3.6.2-16-2017-00001 EFOP
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