scholarly journals Seed production of lemon balm and the quality of its seeds in the middle of the Volga region

2019 ◽  
pp. 34-36
Author(s):  
Ilya Alexandrovich Khapugin
Keyword(s):  
Seed Production ◽  
Weather Conditions ◽  
Mineral Fertilizers ◽  
Small Scale ◽  
Melissa Officinalis ◽  
Seed Productivity ◽  
Lemon Balm ◽  
Maximum Productivity ◽  
Scale Experiment

The influence of mineral fertilizers on seed productivity and quality of obtained seeds of lemon balm (Melissa officinalis L.) was studied in the field small-scale experiment under conditions of unstable moistening of the Mordovia Republic. As a result, it was found that seed productivity varied depending on weather conditions and the types of fertilizers introduced. It was shown that the maximum productivity of Melissa officinalis plants was on the variant with the use of phosphorus-potassium fertilizers at a dose of P60K90 (71.2±78.5 g/m2 in 2017 and 48.8±4.3 g/m2 in 2018), while it exceeded the control variant by 74-91 %. The total germination of seeds of Melissa officinalis practically did not change over the years, and was in the range of 37-39 %. Separation of seeds according to the degree of aging allowed to increase germination 11.4-13.3 %.  

Study of external factors to minimize segregation of granular particles

2020 ◽  
Vol 31 (10) ◽  
pp. 2050147
Author(s):  
Saleema Panda ◽  
Danielle S Tan
Keyword(s):  
Food Processing ◽  
External Factors ◽  
Small Scale ◽  
Pharmaceutical Chemical ◽  
Wall Roughness ◽  
Related Factors ◽  
End Products ◽  
Granular Particles ◽  
Scale Experiment

Segregation of granular particles affects the quality of end products in the pharmaceutical, chemical and food processing industries. Many researchers have worked on controlling the mechanical properties of granular particles to minimize segregation. In this paper, we studied different chute-related factors — inclination angle, friction, fill, channel geometry and base profile — and their effects on segregation. We conducted a small-scale experiment with chute inclined at different angles, and also numerical simulations performed using an open-source discrete element method (DEM) code — LIGGGHTS. We found the optimal condition for minimum segregation of a binary granular mixture. We concluded that segregation is minimized if the stream-wise velocity is low, for example, by keeping the chute at a low inclination [Formula: see text] and increasing the wall roughness to 0.14.

scholarly journals Effect of Convective Drying on Quality of Lemon Balm (Melissa Officinalis L.)

2011 ◽  
Vol 1 ◽  
pp. 1932-1939 ◽  
Author(s):  
Dimitrios Argyropoulos ◽  
Joachim Müllera
Keyword(s):  
Convective Drying ◽  
Melissa Officinalis ◽  
Lemon Balm

scholarly journals Impact of weather conditions and sowing method on seed performance of meadow clover in the Middle Urals

2021 ◽  
Vol 59 (2) ◽  
pp. 178-185
Author(s):  
N. I. Kasatkina ◽  
Z. S. Nelyubina ◽  
I. Sh. Fatykhov
Keyword(s):  
Seed Production ◽  
Negative Impact ◽  
Weather Conditions ◽  
Climatic Conditions ◽  
Middle Urals ◽  
Seed Productivity ◽  
Weather Factors ◽  
Seed Formation ◽  
Hydrothermal Coefficient ◽  
Hydrothermal Regime

Seed production of perennial leguminous herbs, including meadow clover (Trifolium praténse), is complicated due to the natural and climatic conditions of the region. In Middle Urals, only two to three years out of ten are favorable for seed production. Estimation of influence of the hydrothermal regime of the growing season and the sowing method has been carried out in the experimental crop rotation of the Udmurt Research Institute of Agriculture, UdmFRC Ural Branch of the RAS with the seed grass stand of meadow diploid clover varieties Pelican and Trio, tetraploid variety Kudesnik It has been revealed that seed productivity of meadow clover on sod-podzolic medium loamy soil was more dependent on the prevailing hydrothermal regimes of vegetation periods, as well as on the variety’s ploidy. A relatively high seeds yield of the Pelican variety (2n) 444-593 kg/ha and Kudesnik variety (4n) 101-116 kg/ha was formed under conditions of insufficient and optimal moisture supply of the vegetation period with a hydrothermal coefficient of 0.67-1.41. With increase in hydrothermal coefficient p to 1.56-1.69, the seeds yield of the Trio variety (2n) decreased to 251-328 kg/ha, of the Kudesnik variety (4n) - to 77-91 kg/ha. Under the same conditions, according to the hydrothermal regime of vegetation, the Kudesnik clover variety formed a relatively larger number of stems and heads, however, the heads productivity was significantly inferior to diploid varieties, which ultimately affected its seed productivity. Sowing diploid varieties of meadow clover Pelican and Trio in the usual ordinary way (15 cm), tetraploid variety Kudesnik in a wide-row way (30 cm) allowed increasing seeds yield and thereby neutralizing the negative impact of weather factors. Sstudy of the seed formation features of meadow clover varieties differing in ploidy in contrasting agrometeorological conditions may be of interest in developing methods for optimizing their seed productivity.

scholarly journals SUSCEPTIBILITY OF LEMON BALM (Melissa officinalis L.) VARIETIES TO SEPTORIA LEAF SPOT (Septoria melissae Desm.) IN HUNGARY

2019 ◽  
Vol 18 (1) ◽  
pp. 47-56
Author(s):  
Gergő Kovács ◽  
Éva Zámbori-Németh ◽  
Géza Nagy
Keyword(s):  
Leaf Spot ◽  
Plant Protection ◽  
Disease Incidence ◽  
Weather Conditions ◽  
The Other ◽  
Melissa Officinalis ◽  
Lemon Balm ◽  
Protection Method ◽  
Cultivated Plant ◽  
Septoria Leaf Spot

Lemon balm (Melissa officinalis L.) is a widely cultivated plant in Europe. Septoria melissae Desm. is the most important pathogen of lemon balm crops, which may cause serious yield loss by the severe leaf fall. As chemical control of the pathogen is restricted, alternative plant protection methods, like the use of tolerant varieties, should be taken under consideration. The goal of our work was to evaluate the susceptibility of three lemon balm varieties to Septoria leaf spot in field. The trials were carried out in 2016 and 2017 in Budapest-Soroksár, Hungary. Dynamics of infection showed characteristic sharp increase from the beginning of August in both years. The lowest infection levels were observed in cultivar ‘Lemona’. The disease incidence in the middle of August was 19% in the first year and 59% in the second year, while these values were over 40% and 70% in the other cultivars ‘Soroksári’ and ‘Quedlinburger Niederliegende’, respectively. The manifestation of symptomps was also significantly lighter on the ‘Lemona’ plants and they had the highest ratio of healthy leaves (81%) compared to the other cultivars. According to the data, weather conditions might modify the range of the differences among the cultivars. It was concluded that appropriate selection of varieties could be an effective and enviromental friendly plant protection method in the practice of lemon balm cultivation.

scholarly journals Propagation of Selected Culinary and Ornamental Herbs

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 633e-634
Author(s):  
J.R. Schroeder ◽  
Alice Le Duc
Keyword(s):  
Melissa Officinalis ◽  
Origanum Vulgare ◽  
Lemon Balm ◽  
Significant Difference ◽  
Artemisia Abrotanum ◽  
Hyssopus Officinalis

Ten culinary and ornamental herbs were evaluated for time and quality of rooting of tip cuttings. The taxa included in the study were oregano (Origanum vulgare), lemon thyme (Thymus ×citriodorata), applemint (Mentha suavolens), Persian catnip (Nepeta ×faassenii), lemon balm (Melissa officinalis), southernwood (Artemisia abrotanum), caraway thyme (Thymus herba-barona), hyssop (Hyssopus officinalis), `Blue Wonder' catnip (Nepeta `Blue Wonder'), pineapplemint (Mentha suavolens var. variegata). Four replicates of each species were used. The cuttings, untreated and rooting hormone treated, were placed under intermittent mist, then cuttings potted when a 1- to 1.5-inch root ball had developed. Most of the stock suffered from some chlorosis during rooting; southernwood cuttings particularly displayed severe chlorosis which was overcome with 2 weeks of constant-feed fertilizer after potting. Oregano displayed the best results, rooting in seven days with or without treatment. It produced a sellable 4-inch pot in 31 days from sticking the cuttings. Lemon thyme, applemint, Persian catnip, and lemon balm all rooted in 14 days if treated. No difference was observed in days to rooting between treated and untreated lemon thyme. Untreated cuttings of lemon balm, applemint, and Persian catnip rooted in 25 to 30 days. Treated applemint cuttings not only rooted more quickly but produced a marketable 4-inch pot in significantly less time. Southernwood and caraway thyme rooted in 25 days, with no significant difference between treated and untreated cuttings. Hyssop, pineapplemint, and `Blue Wonder' catnip took about 30 days, also with no significant difference between treated and untreated cuttings.

scholarly journals THE INFLUENCE OF MINERAL FEEDING ON SEED PRODUCTIVITY AND SOWING QUALITY OF SEEDS OF ALLIUM PORRUM IN CONDITION OF CENTRAL NONCHERNOSEM ZONE

2012 ◽  
pp. 51-55
Author(s):  
A. A. Koshevarov ◽  
S. M. Nadezhkin ◽  
A. F. Agafonov
Keyword(s):  
Mineral Fertilizers ◽  
Seed Plants ◽  
Allium Porrum ◽  
Seed Productivity

The influence of mineral fertilizers (nitric, phosphoric and potassium) on Allium porrum were evaluated in the trials. Optimum doses and combinations were installed for development of seed plants, receptions of the most output and quality of seed product.

scholarly journals Optimization of the Structural Design of the Process of Fertilizer Mixing and Biomodification of Solid Mineral Fertilizers

2021 ◽  
pp. 17-22
Author(s):  
M.A. Gaibaryan ◽  
◽  
V.I. Sidorkin ◽  
N.N. Gapeeva ◽  
◽  
...  
Keyword(s):  
Structural Design ◽  
Mineral Fertilizers ◽  
General Process ◽  
Maximum Productivity ◽  
Mixing Intensity ◽  
Synchronous Operation

A rational structural construction of the general process of fertilizer mixing and biomodification of solid mineral fertilizers is proposed. It covers all the process steps starting from the receipt of individual mixing components at the enterprise fertilizer mixing section through to the shipment of the finished biomodified fertilizer mixture to the finished product warehouse. The condition of synchronous operation of units and assemblies of a fertilizer mixing line is substantiated, where its maximum productivity, high mixing intensity and good quality of the mixture are achieved.

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