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Gewählte Master / Diploma Thesis:

Bernd Jost (2017): Eignung von Zweitfrüchten für die Biogasnutzung.
Master / Diploma Thesis - Abteilung Pflanzenbau, BOKU-Universität für Bodenkultur, pp 62. UB BOKU obvsg

Data Source: ZID Abstracts
Abstract:
Apart from the cultivation of feed- and foodstuff, the soaring cultivation of energy crops leads to increasing competition for the limited available arable land. The cultivation of crops in a double cropping system is a possibility to solve this conflict by a sustainably higher harvest yield with constant consumption of land resources. In this study the yield of second crops in a double cropping system in mono- and mixed culture with subsequent utilization as biogas substrate in the continental climatic area in Austria has been investigated. In addition the effects of the cultivation of a second crop on the soil mineral nitrogen content (Nmin) and the field emergence of the subsequent crop winter barley (Hordeum vulgare L.) were determined. For the experiment maize (Zea mays L.), sorghum (Sorghum bicolor (L.) Moench), buckwheat (Fagopyrum esculentum Moench), quinoa (Chenopodium quinoa Willd.) and the mixed cultures maize x sorghum and buckwheat x quinoa were sown in three seeding rates, in three repetitions and on three sowing dates. With an early seeding date, the highest yield can be achieved with maize. In the case of a sowing of maize after the mid of July, a strong decrease in yield can be observed and the dry mass centration required for silage preparation is not any longer reached. From this point on buckwheat yields are significantly higher than the yields of maize. By the cultivation of the second crops the soil mineral nitrogen, present after the harvest of the preceding crop, can be incorporated by plants and thus prevented from being leached into deeper soil layers or in the groundwater. The cultivation of second crops resulted in a diminished field emergence of the subsequent winter barley. The results show that the cultivation of second crops has a potential for utilization as biogas substrate making a valuable contribution to the expansion of renewable energies.

Beurteilende(r): Kaul Hans-Peter
1.Mitwirkender: Euteneuer Pia

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