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Development of different herbaceous perennial species on the experimental extensive green roof of Corvinus University Budapest
85-89.Views:116During 2003-2004 six "traditional" herbaceous plant species (Sedum reflexum, Sedum acre 'Aureum', Sedun spurium„Sedum floriferum, Festuca glauca) and six "new" plant species (Sedum pulchellum, Prunus tenella, fivericum polyphyllum, CeraiTtignIct plumbaginoides, Dianthus plumarius and Phlox subulala) were tried on four different types of roof insulation on the 100 m large experimental extensive green roof of the Building K of Corvinus University Budapest, at Villányi street, Budapest. According to the results obtained so far, the viability and good decoration values of all the "traditional" plants were proved. From the six "new" plants Ceratostigma plumbaginoides, Dianthus plumarius and Sedum pulchellum (with some restrictions) proved to be suitable. A significantly poorer development was showed by the remaining "new" species (Phlox subulata, 1-1yericum polyphyllum, Prunus tenella) than the "traditional" ones. As for the different types of roof insulation, the best was with the direct order of layers, and drainage layer with water storage capacity.
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Monitoring of water regime in an apple orchard
29-32.Views:253Our investigation was carried out at an micro-irrigated intensive apple orchard in Debrecen-Pallag in 2010. The aims of the study were to monitor the effect of a compacted layer on soil water regime by tensiometers and supporting the water management of the orchard. The results suggest that the physical characteristic of the examined soil is sandy soil with low capillarity and total available water content. The soil water tensions were varied between pF 0 and 2.5 due to the extreme precipitation circumstances in 2010. Tensiometers in 40 cm depth resulted fast (few hours) and significant respond to precipitation than in the 70 cm soil layer. Based on daily measurements, the soils possess a daily fluctuation of soil moisture, however the changes become more moderate in deeper layers. In accordance with all of the results, the amount of drainable water regime was about 20.6 V/V% at 40 cm depth and 18.6 V/V% at 70 cm mainly. The harmful surplus water can be infiltrated by loosening of the compacted soil layer in 50–70 cm depth or led off by vertical drainage.
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Pilot study for irrigation modelling of a pear plantation
81-84.Views:307Our investigation was carried out in the area of Fruit growing Research and Consultant non-profit company, at Újfehértó. The pear requires large water quantity, but this pear plantation hasn’t irrigation system not yet. This study reviews the drainage conditions of the area based on digital elevation model, and examined the canopy cover of pear trees by evaluating of the hyperspectral image. Our aims were to determine the exact watershed based irrigation modelling and determining of the canopy% of the pear orchard to facilitate a precision irrigation decision support system.
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The utilisation of nutrient elements in soilless cultures of vegetable production
47-49.Views:166Vegetable production in greenhouses may impair the ecological balance of the environment substantially as far as being uncontrolled. Soilless cultures especially should be handled thoughtfully. A fraction of the nutrients administered, more than 25-30%, is doomed to be lost in an open system, and the resulting ecological risk is accompanied with increasing costs of the production. Experiments have been conducted with the purpose of estimate the amount of nutrients involved. According to the results, as a mean, 30-80 per cent of the main nutrients was utilised. The rate of nutrient utilisation is influenced by the plant species involved as well as by the circumstances of production. One of its most important components is the irrigation, which determines the amount of overflow and of its salt content.