Tag Archives: flowering

2693–2700 Dz. Dēķena, D. Feldmane and V. Laugale
Preliminary results of rootstock evaluation for Estonian sweet cherry cultivar ‘Anu’
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Preliminary results of rootstock evaluation for Estonian sweet cherry cultivar ‘Anu’

Dz. Dēķena*, D. Feldmane and V. Laugale

Institute of Horticulture (LatHort), Graudu iela 1, LV-3124 Dobele, Latvia

Abstract:

Mahaleb cherry (Prunus mahaleb L.) is the most widely used rootstock for sweet cherries in Latvia, however it has several disadvantages – strong vigour of grafted trees and an intolerance to heavy, waterlogged soils. The aim of the study was to test the suitability of rootstocks of different origins for winter-hard sweet cherry cultivar in Latvian climate. The trial was established in the spring of 2014 at the Institute of Horticulture (LatHort) to test four clonal rootstocks: ‘PiKu 1’, PHL-A’, ‘GiSelA 5’, ‘VSL-1’, and generative rootstock P. mahaleb (control) grafted with cultivar ‘Anu’ (Estonian breeding). Cherries were planted at 5×3.5 m in a random block design in three replications with three trees per plot. Tree height, annual growth of shoots, the viability of trees after wintering period and the intensity of flowering and production were evaluated in 2016–2019. Sweet cherry cultivar ‘Anu’ had the best overall winter-hardiness in the combinations with rootstocks ‘GiSelA 5’ and P. mahaleb. The highest intensity of flowering and production were observed in trees grafted on ‘GiSelA 5’. Trees on ‘VSL-1’ had the highest decease rate and the lowest winter hardiness.

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2195–2202 І. Bobos, I. Fedosy, O. Zavadska, O. Tonha and J. Olt,
Optimization of plant densities of dolichos (dolichos lablab L. var. lignosus) bean in the Right-bank of Forest-steppe of Ukraine
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Optimization of plant densities of dolichos (dolichos lablab L. var. lignosus) bean in the Right-bank of Forest-steppe of Ukraine

І. Bobos¹, I. Fedosy¹, O. Zavadska¹, O. Tonha¹ and J. Olt²,*

¹National University of Life and Environmental Sciences of Ukraine,
Heroyiv Oborony 15, UA03041 Kyiv, Ukraine
²Estonian University of Life Sciences, Institute of Technology, Kreutzwaldi 56,
EE51006 Tartu, Estonia
*Correspondence: jyri.olt@emu.ee

Abstract:

The density of the plants of Dolichos bean significantly influenced the economically valuable indicators, because there is always competition for light, moisture and nutrients between plants in the life process. The period from mass sprouting to the technical ripeness was reduced with increasing the plant density. Such a pattern was characteristic of all phases of the growth and development of the Dolichos bean. The plants with high population (71 thousand units ha-1) took short period (60 and 119 days) from germination to the beginning of technical and biological ripeness, respectively, turned out to be the earliest ripening crops. The plants are better illuminated, the soil nutrition conditions are improved and the sanitary-hygienic climate of the crops improves with thinned crops, thereby plant productivity has raised. However, the average yield of scapulabeans and unripe Dolichos seeds is regulated by the density of the plants, and increased in density due to the greater number of plants. The optimum density for Dolichos bean was 71 thousand plants per hectare, at which yields of green shoots and green peas were formed 7.3 and 3.3 t ha-1, respectively.

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