2017, Vol. 28, No. 2

Selle kollektsiooni püsiv URIhttp://hdl.handle.net/10492/5567

Sirvi

Nüüd näidatakse 1 - 6 6

Assessment of chemical and sensory quality of unsalted and salted sweet cream butter during storage at different temperatures and time
(Estonian Academic Agricultural Society, 2017) Laikoja, Katrin; Teder, Liis; Jõudu, Ivi; Estonian University of Life Sciences. Institute of Veterinary Medicine and Animal Sciences. Chair of Food Hygiene and Veterinary Public Health; Estonian University of Life Sciences. Institute of Veterinary Medicine and Animal Sciences. Chair of Food Science and Technology
Quality of butter depends on many factors such as quality of raw material, production method, ingredients used, type of packaging. Chemical changes taking place during storage of final product are also important. Extent of oxidation and the amount of free fatty acids in Estonian butter have not been investigated recently in experimental studies and have been evaluated at national level only with regard to intervention buying-in. The purpose of this work was to evaluate the quality of salted and unsalted sweet cream butter produced in continuous butter machine and stored at different storage temperatures and time periods. Three batches of salted and unsalted sweet cream butter were prepared and were stored at three different temperatures: at –20 °C for 24 weeks, at +5 °C for 12 weeks, at +20 °C for 8 weeks. Dry matter and salt content, peroxide value, acid value and organoleptic properties were evaluated. No major differences were found when comparing acid values and peroxide values at different storage temperatures. There were no significant differences between salted and unsalted butter samples and no age trends for the values. At all storage temperatures, the level of acid value (maximum value 0.81 mmol 100 g-1 fat) was lower than the upper limit established for high-quality butter (1.2 mmol 100 g-1 fat). The peroxide value (maximum value 0.050 meq per kg fat) was also lower than the upper limit established for high-quality butter (0.3 meq kg-1 fat) at all storage temperatures. After eight weeks of storage the sensory characteristics of butter – appearance, taste and flavour – scored at least 4 points or higher on 5 point scale that corresponds to high-quality butter.
The effect of Silicon on the organically grown iceberg lettuce growth and quality
(Estonian Academic Agricultural Society, 2017) Olle, Margit
Si helps plants to mitigate with abiotic and biotic stresses because of Si-treated plants become stronger, sturdier and naturally more tolerant. The purpose of the investigations was to look the effect of Silicon on the iceberg lettuce growth and quality. There were two treatments: 1. stabilized silicic acid treatment; 2. control. The first spray, when 1 real leaf was present; the second spray was 2 weeks after spray 1; the third spray was 2 weeks after spray 2. First spray: 1 ml silicic acid was solved in 0.5 litre distilled water; second spray: 2 ml silicic acid was solved in 1 litre distilled water; third spray: 2 ml silicic acid was solved in 1 litre distilled water. pH of spray solution was 5,5. Control plants were untreated. Iceberg lettuce plants were taller and more bread in Si treatment compared to control. The content of NO3, N, P, and Ca was higher in Si-treated plants.
Lihtsa krohmseene inokulaadi kasvatamine ning võrdlus kaubanduslike toodetega taimekasvu suurendamiseks
(Estonian Academic Agricultural Society, 2017) Vahter, Tanel; Nõges, Märt
Arbuscular mycorrhizal fungi (AMF) are obligate symbionts forming mutualistic relationships with most land-plants. In AM symbiosis, the plant supplies the fungal partner with products of photosynthesis and in return recieves various mineral nutrients from the soil. Because of complex interactions with both soil and plants, disturbance can dramatically decrease AMF activity in soils and in these circumstances, it could be usefull to restore AMF communities using inoculations. The use of AMF inoculants has so far been minimal due to the high cost and low availability of these products. In this study, the production of simple crude inocula was tested in trap cultures and the most suitable growth substrate nutrient content determined. The effectiveness of the produced inocula was compared with two commercially available inoculants. The results of this study indicate that the best substrate for inocula production in pot-cultures is pure sand with 5% natural soil. When using roots of plants grown in this manner as inoculants, the largest biomass and root-colonisation was achieved. As one of the commercial inoculants did not contain any mycorrhizal propagules at all, the need for quality control and establishment of industry standards is paramount. This study highlights the basics of using AM inoculations in home gardens and small- scale agriculture. The inoculation of large areas is still problematic because of low-yielding inoculant production, but could become highly perspective as methodology improves.
Morphological lodge of desi cotton (gossypium arboreum l.) genotypes and stage-manage by planting log under dry tropical prospect
(Estonian Academic Agricultural Society, 2017) Jan, Karim; Waseem, Muhammad; Baloch, Dost Mohammad; Baloch, Abdul Hameed; Khan, Mustajab A.; Khan, Taimoor; Rashid, Muhammad; Ali, Qurban
Planting log is the most considerable factor which directly manipulates the plant traits under naturally prevailing environment. The aim of the trial was to ensure the influence of planting hiatus on the morphological cabin of Desi cotton (Gossypium arboreum L.) varieties under dry tropical coast. The research was carried out during 2016 on three desi cotton genotypes C1 (FDH-512), C2 (FDH-502), C3 (FDH-170) under three-fortnightsowing regimes (S1 = 15. March, S2 = 1. April and S3 = 15. April) at agronomy research area in the Lasbela University of Agriculture, Water and Marine Science, Uthal, Lasbela, Pakistan. Momentous results were originated for different morphological traits according to the arid environments. Significant results were observed for traits i.e.; number of monopodial branches, number of sympodial branches, number of capsule per plant, number of seeds per capsule, number of locules per capsule, number of seeds per locules, weight of seed per capsule, seed colour, seed yield per plant, lint percentage, root shoot ratio (%), root depth (cm) for various sowing dates and desi cotton varieties. Results of the traits like i.e. the number of locules and per capsule, a number of seeds per locules was yielded completely nonsignificant outcomes both for the diverse sowing period and desi cotton genotypes. The interaction between the both factors was found to be nonsignificant in all traits. The correlation amongst cotton individual characteristics was observed, it was found that capsules per plant and lint percentage, monopodial branches per plant, root shoot ratio, root depth, seed weight per capsule and seed yield per plant were significantly and positively correlated. The seed yield and lint percentage was also significantly correlated, which showed that selection may be positive responsive in sense of lint percentage, monopodial branches, seed yield per plant, capsules per plant and seed weight per capsule to get a superior yield of cotton. Under the existing dry climatic condition, it was found that the finest planting window of 15. April for the desi cotton FDH-170 is most suitable for its cultivation.
Tetraploidse punase ristiku seemnepõllu rajamine kattevilja aluse külviga
(Estonian Academic Agricultural Society, 2017) Bender, Ants; Tamm, Sirje
In 2013–2014 field trials were organised in Estonian Crop Research Institute to comply with the applied project of the Estonian Ministry of Agriculture. In the establishment of a red clover seed production field 2 cover crops (barley and spring wheat) were investigated on 4 treatments and 4 seed rates (2, 4, 6 and 8 kg ha-1 ). Based on the field trials it can be concluded that both two-row barley (the variety 'Maali') and spring wheat (the variety 'Mooni') are suitable cover crops for the establishment of a red clover seed production field. For early red clover barley is more suitable as a cover crop. For the late red clover barley and spring wheat are equally suitable as cover crops. According to yield results of cover crop, red clover seed yield as well as economical calculations based on expenditures, reduction of recommended seed and nitrogen rate should be decrease to up to 1/3 in spring cereals cultivation. For tetraploid varieties of red clover we recommend to use 4–6 kg/ha (germination 100%) in the establishment of the red clover seed production field.
Ülevaade: Toidulisandid – kasulikud, kasutud või ohtlikud?
(Estonian Academic Agricultural Society, 2017) Püssa, Tõnu; Eesti Maaülikool. Veterinaarmeditsiini ja loomakasvatuse instituut. Toiduhügieeni ja rahvatervise õppetool
The world market of food (dietary) supplements is very broad and diverse, orientating in which is quite difficult even for experts. One part of the supplements are useful, another part potentially dangerous, and third part simply useless. In case of versatile diet a healthy human generally doesn't need to consume food additives, their use as concentrates of physiologically active substances must be careful and only according to recommendations of a physician. This paper is not an ordinary literature review. Due to very high number of different food supplements and respective literature, it is very difficult to write such an article. Our task was to provide, with the help of more pronounced examples, a review of the basic health hazards connected with consumption of food supplements.

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