Tag Archives: medicago

663-672 A. Liatukienė, Ž. Liatukas and V. Ruzgas
Resistance of European lucerne accessions to aluminium
Abstract |

Resistance of European lucerne accessions to aluminium

A. Liatukienė, Ž. Liatukas and V. Ruzgas

Institute of Agriculture, Lithuanian Research Centre for Agriculture and ForestryInstituto al. 1, Akademija, Kėdainiai distr., LT-58344, Lithuania;e-mail: aurelija@lzi.lt

Abstract:

Aluminium toxicity is one of those factors limiting lucerne production on acid soils. Efficient method for selection of Al resistant plants should accelerate breeding of new cultivars. Reaction to Al of the 25 European lucerne cultivars was evaluated using Petri dish with filter paper moistened with AlCl3 concentrations 0, 2, 4, 8, 16 mM. The tested lucerne cultivars did not differ considerably by resistance to Al in regard to the origin. It was clear that aluminium inhibited lucerne seed germination, seedling root and hypocotyl elongation depending on cultivar resistance. Germination rates at AlCl3 concentrations 0, 2, 4 were similar for most cultivars, whereas AlCl3 concentrations 8 and 16 mM highly inhibited germination of susceptible cultivars. Germination test was suitable for elimination of the most susceptible accessions. The seedlings hypocotyl elongation reaction to different AlCl3 concentrations characterized cultivars better than root elongation rates. This method was suitable for selection of the most resistant accessions as only cultivars Magda, Vertus, Luna, Marova out of the 25 ones formed hypocotyls at AlCl3 concentrations 16 mM.

Key words:

, ,




361-366 E. Nugis, T. Võsa, K.Vennik, H. Meripõld, J. Kuht, M. Müüripeal
Results of observations of damages to field and landscape
Abstract |
Full text PDF (712 kB)

Results of observations of damages to field and landscape

E. Nugis¹, T. Võsa¹, K.Vennik², H. Meripõld¹, J. Kuht³, M. Müüripeal¹

¹Estonian Research Institute of Agriculture, Teaduse 13, Saku 75501, Estonia; e-mail:edvin.nugis@eria.ee, taavi.vosa@eria.ee.
²Tartu University, Faculty of Science and Technology, Vanemuise 46, Tartu 50090; e-mail: kersti.vennik@ksk.edu.ee
³Estonian University of Life Sciences, Kreutzwaldi 1, Tartu 51014; e-mail:jaan.kuht@emu.ee

Abstract:

It is a fact that crop growth conditions vary greatly within the same field. Provisionally actual growth conditions are made up of many components, i.e. variation of natural conditions (climate & soil), results of effects of machinery on soil (soil compaction) and unfavourable conditions for plant growing. In Estonia rather widely used ATV’s are causing remarkable damage to landscapes.All collected data were geo-referenced by means of a GPS-receiver and post-processed forposition correction. For All Terrain Vehicle (ATV) damage assessment the trajectory was recorded. Both the area and forms of damages were assessed for damaged sites, (e.g.) damage to potato by Colorado beetles. The collected data were compared to the digital soil map.Economic loss on the average, due to unfavourable conditions for plant growth, in thecase of winter rye "Portal" was 131 euros per ha, for medicago 18.5 euros per ha, for spring barley "Anni" 1000 euros per ha and for potato “Ando” 27.1 euros per ha.

Key words:

, , , , , , , ,