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• The role of leaf area and photosynthesis in optimising the sowing date of maize

  5-10

  Enikő Bene

  Mihály Sárvári

  Views:

  148

   

  Our sowing date experiment took place in the Demonstration Garden of Institution of Plant Sciences, Agricultural Center of University of Debrecen, in 2012–2014. The thesis contains data of test year 2014. Our purpose, besides several other examinations, was to observe how sowing date influences leaf area index and activity of photosynthesis of maize hybrids, and how those factors affect fruiting. In the experiment we monitored the change of the leaf area index and the photosynthesis of hybrids with four different growing seasons.

  Based on the results, it can be concluded that most of the examined hybrids reached their smallest leaf area with the third sowing date and with the highest yield results. Hybrid Da Sonka had the largest leaf area (4.10 m² m^-2), and hybrid DKC 4590 produced the highest yield (13.16 t ha^-1)

  with the third sowing date.

  During testing the photosynthetic capacity, the extremely high performance of the youngest plants with the third sowing date is outstanding, which can be explained by the different ripening periods. Examination of the correlation between the photosynthetic capacity and the yield, by linear regression analysis, also proves that photosynthesis has a determinative role in fruiting.

  The results obtained confirm that not only the environmental and agricultural factors in the growing season have effect on the yield, but also other factors like the leaf area index and the photosynthesis are determinative parameters, and all those factors together, modifying effects of each other, develop average yields.

• Rural development: how to measure performance imbalances in agribusiness chains

  21-27

  Adrienn Molnár

  Xavier Gellynck

  Views:

  112

  No abstract

• Analysis of integrated, quality and environment focused management practices in the Forage Industry Ltd, Bábolna

  74-79

  Elza Kovács

  János Mészáros

  Csaba Juhász

  Views:

  117

  The significance of the effect of agricultural activities on the environment was focused on later than that of industry; however, today, an increasing number of companies using an environmental management system (EMS) has been registered in this sector, too. In the agricultural sector, EMS according to ISO 14001 was introduced first in the forage industry by Bábolna Takarmányipari Kft. In our study, we analyze the environmental management system integrated into the quality system of this company and discuss the effects on the organization and the economic issues. As a result of the EMS, emissions have been reduced effectively, and both the responsibility system and technology have become more controlled. The company chose to develop its environmental performance continuously, which is proved to have been performed successfully, considering its limited, one-year experience.