Wittmann Antal Növény-, Állat- és Élelmiszertudományi DI
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Wittmann Antal Növény-, Állat- és Élelmiszertudományi DI Szerző szerinti böngészés "BSc, MSc hallgató"
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Tétel Korlátozottan hozzáférhető Improving yield prediction accuracy using energy balance trial, on-the-go and remote sensing procedureKulmány, István; Zsebő, Sándor; Nyéki, Anikó; Milics, Gábor; Kovács, Attila József; Neményi, Miklós; BSc, MSc hallgató; PhD hallgató; egyetemi oktató, kutatóOur long term experience in the ~23.5 ha research field since 2001 shows that decision support requires complex databases from each management zone within that field (eg. soil physical and chemical parameters, technological, phenological and meteorological data). In the absence of PA sustainable biomass production cannot be achieved. The size of management zones will bw ever smaller. Consequently, the on the go and remote sensing data collection should be preferred. The paper presents the results of ECa and near-surface hyperspectral measurements. For the increase in accuracy of yield prediction of DS models the energy input-output analysis in the management zones can also be used.Tétel Korlátozottan hozzáférhető Increasing corn (Zea mays L.) profitability by site-specific seed and nutrient management in Igmand-Kisber Basin, HungaryMilics, Gábor; Zsebő, Sándor; Szabó, Szilárd; Bűdi, Károly; Takács, András; Láng, Vince; BSc, MSc hallgató; egyetemi oktató, kutatóVariable Rate technology (VRT) in seeding and nutrient management has been developed in order to apply crop inputs variably. Farm equipment is widely available to manage in-field variability in Hungary, however, defining management zones, seed rates and amounts of nutrients is still a challenge. An increasing number of growers in Hungary have started adopting precision agriculture technology; however, data on profitability concerning site-specific seeding and nitrogen management is not widely available. The objective of our work and this paper was to investigate the effect of variable rate seeding and nutrient management in a 92-hectare field planted with corn (Zea mays L.) where site-specific management had not been applied earlier. Management zones, seed and nitrogen variations had to be defined for the first time in the experimental field. Based on long-term remotely sensed data, 3 ha average management zones were determined for soil sampling. After sampling and laboratory analysis, seed rate and nitrogen recommendations were given to the farmer. Seed rates were determined based on the hybrid potential as well as the experience of the grower in the investigated location. Variable rate seeding was carried out by means of a John Deere 1775ND 12 row planting machine. Seed rates were determined between 65 and 82 thousand seeds per hectare. VRT nutrient management was limited to differences in nitrogen head fertilizer only, as soil sampling was carried out in the springtime. Variable rate nitrogen fertilizing was carried out by means of a Kverneland Exacta TL Geospread machine. The head fertilizing rate varied between 80 and 140 kg per hectare of carbamide. Despite dry climatic conditions with no precipitation in the optimal time period, yield and profitability increased. Lack of precipitation limited the efficiency of the variable rate nirogen head fertilizing, however, all 34 management zones produced a profit in the experimental field.Tétel Korlátozottan hozzáférhető A problem-based approach of community supported agriculture within short food supply chains based on a Western Transdanubian SurveyKacz, Károly; Varga, Ádám; BSc, MSc hallgató; egyetemi oktató, kutatóIn recent years, there has been an increasing interest in community supported agriculture, as part of the field of short food supply chains. A considerable amount of literature has been published on SFSCs which mainly deal with the benefits and detriments of these kinds of cooperations. Being regarded as the focal point of this current scrutiny, the study has been created to determine major problems existing on both ends of the food chain spectrum with close connection to the community supported agriculture on producer, consumer and partly on intermediary levels. These problem/target groups were created after an analysis of SFSCs by involvement of several farmer's organization and consumers in the Western Transdanubian region. As result of the survey the most influential factor was determined, namely the in sufficient nature of the market power of CSA organizations. Therefore, the solution of the basic problem coult be a long-term, strategic objective that is the enhancement of the market power of community supported agriculture as vital element of short food supply chains.Tétel Korlátozottan hozzáférhető A termékenyülés alakulása évszakok szerint két sertéstelepenTempfli, Károly; Sárvári, Loretta; Patonay, Ádám; Tóth, Tamás; BSc, MSc hallgató; PhD hallgató; egyetemi oktató, kutatóA sertéstelepek sikeres működését alapvetően meghatározzák a reprodukciós értékmérő tulajdonságok. Vizsgálatunkban a vemhesülési % évszakok szerinti alakulását elemeztük két nagyüzemi sertéstelepen. Eredményeink alapján megállapítható, hogy a nagyüzemi termelésben alkalmazott kocák vemhesülési eredménye egész évben megfelelő, ugyanakkor a modern fajtáknál és hibrideknél is azonosíthatók szezonális sajátosságok. Az "A" telepen 88.9, míg a "B" telepen 89.7 volt a vemhesülési %, ami a hazai átlagokkal összevetve jónak tekinthető. Mindkét vizsgált telep esetében megfigyelhető a szezonális infertilitás kedvezőtlen jelensége, aminek következtében a nyári időszak vemhesülési % eredményei elmaradnak a többi évszaktól. Az "A" telep nyári vemhesülési % eredménye 86.7, a "B" telepen 70.7. Az "A" telep esetében a nyári eredmény szignifikánsan (P<0,05) kisebb a tavaszihoz viszonyítva, de nem különbözik az őszi és a téli átlagoktól. A "B" telepen a nyári vemhesülési % az összes évszakhoz képest szignifikánsan (P<0,05) kisebb volt.