temperature

Effect of different storage materials on the seed temperature, seed moisture content and germination of wheat under farmer’s field condition of Kailali district, Nepal

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N. Khatri1*, D. Pokhrel1, B.P. Pandey1, K.R. Pant1, M. Bista2

1National Wheat Research Program, Bhairahawa, Rupandehi, Nepal 2Regional Agriculture Research Station, Lumle, Kaski, Nepal

(Manuscript received 19 July 2019; accepted for publication 30 October 2019)

Abstract. A study was conducted at four Village Development Committees (Masuriya, Udashipur, Basauti and Pahalmanpur) of Kailali dis- trict, Far western Region, Nepal in 2016/17 to find out the effect of different storage materials on the seed moisture content and germination percentage of wheat. Seeds of wheat were packed using five storage materials (metal seed bin, earthen pot, purdue improved crop storage / Pics/ bag, gunny bag and super grain bag). The stored seed samples were drawn at three-month intervals starting from May 2016 to January 2017. The experiment was arranged in Randomized Complete Block Design (RCBD) in four replications. The results of analysis of variance revealed that the effect of storage materials was significant (P≤0.05) on seed moisture content and seed germination of wheat. After nine months of storage, the seeds stored in Pics bag recorded the lowest moisture (13.3%) and temperature (26.4°C), and the highest germination percentage (91.75%). The lowest quality performance (high moisture and temperature, low germination) of stored seeds was observed in an earthen pot. From the results obtained, it was concluded that wheat seed could be stored for a long time in Pics bag without deteriorating its quality parameters.

 

Effect of fluorescence on the technological characteristics of cocoons at different cooking temperatures

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M. Panayotov*

Department of Animal science-Non-ruminant and other animals, Faculty of Agriculture, Trakia Univercity, 6000, Stara Zagora, Bulgaria (Manuscript received 5 May 2016; accepted for publication 11 August 2016)

Abstract. The subject of research are Bombyx mori L. cocoons, differentiated by the nature of their fluorescent radiation. In each fluorescent group 2 subgroups were formed prepared for unreeling through cooking at 80 and 90°C for 5 min. To account for the effect of fluorescence at various cooking temperature levels the basic technological traits signs of the silk filament and cocoons have been defined and analysed: total length of the silk filament (m), nonbroken filament length (m, %), raw silk pesentage (%) and reelability (%). It was found that fluorescence of cocoons has statistically significant (p≤0.01- 0.001) effect on the phenotypic manifestation of the technological traits. Within the two cooking temperature levels, the yellow fluorescent cocoons demonstrate higher values at 80 °C, and violet ones at 90°C. The better technological qualities and the lower cooking temperature in the yellow fluorescent cocoons give reason to believe that their use is economically more profitable for the silk reeling industry compared with violet fluorescent cocoons.

Influence of the temperature for distillation on the yield and quality of the Rosa alba L. essential oil

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A. Dobreva*

Institute for Roses and Medicinal Plants, 49 Osvobojdenie, 6100 Kazanlak, Bulgaria

Abstract. Applying the method of distillation, the influence of different temperatures at the outlet of the cooler when processing Rosa alba is traced. It has been found that the extraction temperature rise leads to an increase of the yield by 10%, but losses of essential oil components up to 33% are detected. Gas chromatography assay revealsthattemperaturerateat24÷28oC keepsthemaximumoftheterpenealcohol citronellol+nerolandgeraniol(13.52%and15.4 %, respectively), so this temperature level can be recommended.

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