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STORABILITY OF SWEET POTATO GENOTYPES UNDER ORDINARY AMBIENT STORAGE CONDITIONS
In Press
Abstract
STORABILITY OF SWEET POTATO GENOTYPES UNDER ORDINARY AMBIENT STORAGE CONDITIONS
ORCID logoPrakash Bhattarai1, ORCID logoKalyani Mishra Tripathi2, ORCID logoDurga Mani Gautam2, ORCID logoArjun Kumar Shrestha2
1Nepal Agricultural Research Council, National Potato Research Programme, Khumaltar15, Lalitpur Metropolitan City, 44700, Nepal
2Agriculture and Forestry University, Rampur, Chitwan, Bharatpur 15, Bharatpur Metropolitan City, 44209 Nepal
The study was carried out to evaluate the storage performance of sweet potatoes in different conditions under ordinary ambient temperature (10.11–17.49 °C) at Khumaltar, Lalitpur (1350 masl) district of Nepal from December, 20 to March, 13 during the years 2018/19 and 2019/20. The experiment was laid out in Factorial Completely Randomized Design with three replications. Tuberous roots of three sweet potato genotypes ('CIP 440015', 'CIP 440267', and 'Local White') harvested at 4-month maturity were stored inside an ordinary room in dry sand, sawdust, thin jute sack, natural mud pot, and open crates (control). Data were taken on the 2nd, 4th, 6th, 8th, 10th, and 12th weeks of storage. The pooled results showed a significant effect of storage conditions on physiological loss in weight and rotting (%) of sweet potato genotypes. With the progression of the storage period, physiological weight loss (PLW) and rotting (%) were significantly increased in all treatments. At the 12th week of storage, the highest PLW was recorded in the tubers stored in open crates (70.2%) followed by natural mud pot (65.2%) whereas the lowest PLW was observed in tubers stored inside the dry sand (50.2%). Genotype 'CIP 440015' showed good storability with minimum PLW. No weevil infestation and sprouting were observed during the experimental period. The lowest percentage of tuber rotting was recorded in the genotype 'CIP 440015' (55.3%) and inside dry sand (48.7%) at the 12th week of storage while it was the highest up to 85.9% in 'CIP 440267'. The highest rotting 76.7%) was recorded in thin jute bags which is statistically at par with natural mud pot (76.5%). The interaction effect of storage conditions and genotypes was found not significant. The results showed an increment in dry matter and reducing sugar content while the reduction in ß-carotene and starch content of tubers after 3 months of storage inside dry sand. There was positive and strong correlation of storage duration with dry matter (r = 0.750) and reducing sugar (r = 0.658) whereas, negative correlation with starch (r = –0.918) and ß-carotene (r = –0.352) content of sweet potato genotypes. The study concluded that sweet potato tuber can be kept for 8 to 10 weeks in dry sand with minimum postharvest loss in ordinary room condition and the genotype 'CIP 440015' has good storability among the tested genotypes in similar conditions.
Keywords: ambient storage, biochemical changes, rotting, storage, sweet potato, weight loss.
Source: Agraarteadus, 2021, 32(2):In Press
DOI: https://dx.doi.org/10.15159/jas.21.20

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VIITAMINE
Bhattarai, P., Tripathi, K.M., Gautam, D.M., Shrestha, A.K. 2021. Storability of sweet potato genotypes under ordinary ambient storage conditions. Agraarteadus, 32(2):In Press. DOI: 10.15159/jas.21.20.
 
AUTORI KONTAKT
1Nepal Agricultural Research Council, National Potato Research Programme, Khumaltar15, Lalitpur Metropolitan City, 44700, Nepal
2Agriculture and Forestry University, Rampur, Chitwan, Bharatpur 15, Bharatpur Metropolitan City, 44209 Nepal




 
Highlights: 
  • The health of sweet potato tubers remained good up to 8–10 weeks storage at ambient temperature.
  • Storage of sweet potato tubers in dry sand and sawdust was found good with minimum post-harvest losses at room temperature
  • Sweet potato genotype 'CIP 440015' performed best with good storability at ambient temperature.

Tetiana Levenets1, ORCID logoOleksandr Smirnov1,2, Mariia Kovalenko1, Liudmyla Mykhalska2, Victor Schwartau2, Nataliya Taran1
AGAR GEL PHENOTYPING OF ROOT TRAITS AS RAPID AND SENSITIVE ASSAY OF WHEAT SEEDLINGS RESPONSE TO EDAPHIC FACTORS: ON EXAMPLE OF CADMIUM
In Press
Abstract
AGAR GEL PHENOTYPING OF ROOT TRAITS AS RAPID AND SENSITIVE ASSAY OF WHEAT SEEDLINGS RESPONSE TO EDAPHIC FACTORS: ON EXAMPLE OF CADMIUM
Tetiana Levenets1, ORCID logoOleksandr Smirnov1,2, Mariia Kovalenko1, Liudmyla Mykhalska2, Victor Schwartau2, Nataliya Taran1
1Educational and Scientific Centre "Institute of Biology and Medicine", Taras Shevchenko National University of Kyiv, 64/13 Volodymyrska St, Kyiv, 01601, Ukraine
2Institute of Plant Physiology and Genetics, National Academy of Sciences of Ukraine, 31/17 Vasylkivska St, Kyiv, 03022, Ukraine
The influence of different concentrations of cadmium on root elongation, exudative activity of roots and seminal root angle of two wheat genotypes: common bread wheat – Triticum aestivum L. (cv. 'Favorytka') and emmer wheat – Triticum dicoccum Schrank. (cv. 'Holikovska') have been studied in the germination stage. Rapid changes in morphofunctional traits upon first three days of exposure to cadmium on early stages of growth have been studied on phenotyping plates with 25, 50 and 100 µM addition to agar-acid/base indicator medium. Significant inhibition of root elongation, exudative root activity and changes in seminal root angle were observed. Exposure to the highest Cd concentration led to a decrease in primal root length by 50%, decrease in root exudative activity by 88% and decrease in seminal root angle by 24 degrees in T. aestivum compared to a decrease by 12%, 83% and 17 degrees in T. dicoccum. Unlike root growth retardation, a decrease in exudative activity was observed on all three Cd concentrations. The root growth performance at starting stage of seedlings ontogenesis proposed as an express and sensitive phenotyping test method for determining plant response to edaphic stressors by cadmium toxicity example.
Keywords: root phenotyping, seminal root angle, exudative activity, cadmium toxicity, Triticum aestivum, Triticum dicoccum.
Source: Agraarteadus, 2021, 32(2):In Press
DOI: https://dx.doi.org/10.15159/jas.21.22

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VIITAMINE
Levenets, T., Smirnov, O., Kovalenko, M., Mykhalska, L., Schwartau, V., Taran, N.  2021. Agar gel phenotyping of root traits as rapid and sensitive assay of wheat seedlings response to edaphic factors: on example of cadmium. Agraarteadus, 32(2):In Press. DOI: 10.15159/jas.21.22.
 
AUTORI KONTAKT
1Educational and Scientific Centre "Institute of Biology and Medicine", Taras Shevchenko National University of Kyiv, 64/13 Volodymyrska St, Kyiv, 01601, Ukraine
2Institute of Plant Physiology and Genetics, National Academy of Sciences of Ukraine, 31/17 Vasylkivska St, Kyiv, 03022, Ukraine


 
Highlights: 
  • .

SHORT COMMUNICATION: EFFECT OF DIFFERENT LEVELS OF NITROGEN AND FARMYARD MANURE ON THE GROWTH AND YIELD OF SPINACH (Spinacia oleracea L.)
In Press
Abstract
SHORT COMMUNICATION: EFFECT OF DIFFERENT LEVELS OF NITROGEN AND FARMYARD MANURE ON THE GROWTH AND YIELD OF SPINACH (Spinacia oleracea L.)
ORCID logoParbati Thapa1, ORCID logoRam Kumar Shrestha1, ORCID logoKishor Kafle1, ORCID logoJiban Shrestha2
1Institute of Agriculture and Animal Science, Lamjung Campus, Sundarbazar 07, Sundarbazar Municipality, 33600, Nepal
2Nepal Agricultural Research Council, National Plant Breeding and Genetics Research Centre, Khumaltar15, Lalitpur Metropolitan City, 44700, Nepal.
The application of nitrogen (N) and farmyard manure (FYM) greatly affects the growth and production of spinach. The objective of this study was to evaluate the effect of various levels of nitrogen and farmyard manure on the growth and yield of spinach. This study was conducted in the research field of the Institute of Agriculture and Animal Science, Lamjung, Sundarbazar, Lamjung, Nepal from November 2019 to January 2020. The treatments were: 0 kg N ha–1, 30 kg N ha–1, 60 kg N ha–1, 60 kg N ha–1 + 10 t FYM ha–1, 60 kg N ha–1 + 20 t FYM ha–1, 90 kg N ha–1 and 120 kg N ha–1. These treatments were laid out in a randomized complete block design (RCBD) with three replications. The results showed that higher N levels gave better results for all parameters studied. The increasing N fertilization rates increased the vegetative characters and yield of spinach. The maximum plant height (22.68 cm), leaf width (6.69 cm), number of leaves (12.93), fresh weight of leaves (17.07 g) and leaf length (14.94 cm) were recorded with the application of the highest level of nitrogen (120 kg N ha–1). The spinach yield (3.2 t ha–1) was the highest with the application of 120 kg N ha–1. However, the growth and yield traits were not significantly differed with the application of 60 kg N ha–1 + 20 t FYM ha–1. Therefore, this study suggests that spinach production can be maximized by the application of 60 kg N ha–1+ 20 t FYM ha–1.
Keywords: spinach, growth, nitrogen, farmyard manure, yield, fertility.
Source: Agraarteadus, 2021, 32(2):In Press
DOI: https://dx.doi.org/10.15159/jas.21.21

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VIITAMINE
Thapa, P., Shrestha, R.K., Kafle, K., Shrestha, J. 2021. Short communication: Effect of different levels of nitrogen and farmyard manure on the growth and yield of spinach (Spinacia oleracea L.). Agraarteadus, 32(2):In Press. DOI: 10.15159/jas.21.21.
 
AUTORI KONTAKT
1Institute of Agriculture and Animal Science, Lamjung Campus, Sundarbazar 07, Sundarbazar Municipality, 33600, Nepal
2Nepal Agricultural Research Council, National Plant Breeding and Genetics Research Centre, Khumaltar15, Lalitpur Metropolitan City, 44700, Nepal.




 
Highlights: 
  • The application of nitrogen (N) and farmyard manure (FYM) affected the growth and production of spinach. However, the growth and yield traits were not significantly differed with the application of 60 kg N ha–1+ 20 t FYM ha–1.
  • The maximum plant height (22.68 cm), leaf width (6.69 cm), number of leaves (12.93), fresh weight of leaves (17.07 g), leaf length (14.94 cm) and yield (3.2 t ha–1) were recorded with the application of the highest level of nitrogen (120 kg N ha–1), however, these traits were not significantly differed with the application of 60 kg N ha–1+ 20 t FYM ha–1.
  • Spinach production can be maximized by the application of 60 kg N ha–1+ 20 t FYM ha–1.

JUSTIFICATION OF THE MECHATRONIC SYSTEM FOR PIGSTY MICROCLIMATE MAINTENANCE
In Press
Abstract
JUSTIFICATION OF THE MECHATRONIC SYSTEM FOR PIGSTY MICROCLIMATE MAINTENANCE
ORCID logoVitalii Yaropud1, ORCID logoIryna Hunko1, ORCID logoElchyn Aliiev2, ORCID logoIhor Kupchuk1
1Vinnytsia National Agrarian University, 3 Sonyachna St., Vinnytsia, 21008, Ukraine
2Dnipro State Agrarian and Economic University, 25 Voroshylova St., Dnipro, 49027, Ukraine
The main parameters of the microclimate of pig farms are regulated by the norms of technological design. Naturally, such micro­climate parameters at real energy prices require high costs, but these are the most favourable conditions for the life of suckling piglets. According to the presented analysis, the problem of research is the need to provide a micro­climate in the room for comfortable keeping of pigs, which is currently achieved through high energy. The purpose of the development is to increase the efficiency of the microclimate of pig farms by using a mechatronic control system, rational use of utilized air energy and soil thermal potential with reduced energy costs of the ventilation system. The problem is solved by creating such a mechatronic system to ensure the microclimate of pig farms, which can: switch the direction of airflow to ensure the operation of the system in winter and summer; to control the movement of air, which must be disposed of according to the parameters of its quality; to provide a local microclimate in each place where animals are kept; rational use of soil thermal energy as a source of alternative energy; to carry out automatic pumping of the water necessary for humidification of air, and its utilization. The article presents the results of research of parameters of the developed mechatronic system of providing microclimate of pig premises, which were carried out in three stages: research of heat exchanger of side-evaporating type; substantiation of the ventilation system of polluted air intake; substantiation of the ventilation system for injecting clean air taking into account it's geothermal heating/cooling. The advantage of the proposed mechatronic system of the microclimate of pig farms is that it allows increasing the efficiency of microclimate by rational use of energy of utilized air (due to the use of side-evaporator type heat exchanger based on Maisotsenko cycle) and soil heat potential (geothermal energy) at low operating costs of the ventilation system through the additional provision of mechatronic elements. The presented results of numerical simulation of the indirect evaporative heat exchanger allow us to state that the cooling effect obtained in indirect evaporative channels can be quite high in comparison with traditional air conditioning patterns. The presented heat exchanger based on the Maisotsenko cycle (M-cycle) of considered heat carrier flow scheme is characterized by its high cost-effectiveness, low specific cost, small operational costs and structural simplicity, which is confirmed in the works. The models obtained in the Star CCM +software package can be used for optimization analysis of air-cooling with variations in the Reynolds number, humidity, channel length and geometric dimensions of channels. Because of analytical investigations of the contaminated air intake ventilation system, the method was developed and on its basis – the algorithm was implemented for the determination of geometrical arrangement of holes in the air duct of the mechatronic system for pigsty microclimate maintenance.
Keywords: pigsty, microclimate, mechatronic system, ventilation, heat exchanger, geothermal energy.
Source: Agraarteadus, 2021, 32(2):In Press
DOI: https://dx.doi.org/10.15159/jas.21.23

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VIITAMINE
Yaropud, V., Hunko, I., Aliiev, E., Kupchuk, I.  2021. Justification of the mechatronic system for pigsty microclimate maintenance. Agraarteadus, 32(2):In Press. DOI: 10.15159/jas.21.23.
 
AUTORI KONTAKT
1Vinnytsia National Agrarian University, 3 Sonyachna St., Vinnytsia, 21008, Ukraine
2Dnipro State Agrarian and Economic University, 25 Voroshylova St., Dnipro, 49027, Ukraine



 
Highlights: 
  • The developed mechatronic system can:
    • switch the direction of airflow to ensure the operation of the system in winter and summer;
    • control the movement of air, which can be disposed of according to the parameters of its quality;
    • provide a local microclimate in each place where animals are kept;
    • rational use of soil thermal energy as a source of alternative energy;
    • carry out automatic pumping of the water necessary for humidification of air and its utilization.
  • The method was developed and on its basis, the algorithm was implemented for the determination of the geometrical arrangement of holes in the air duct of the mechatronic system for pigsty microclimate maintenance..

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