Tag Archives: pH

1457-1465 D. Nsengumuremyi, N.V. Barakova, V.A. Romanov, A.S. Mityukov and A.V. Guzeva
The effect of sapropel extracts on microflora and physicochemical parameters of Dried Distillers’ Grain
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The effect of sapropel extracts on microflora and physicochemical parameters of Dried Distillers’ Grain

D. Nsengumuremyi¹*, N.V. Barakova¹, V.A. Romanov¹, A.S. Mityukov² and A.V. Guzeva²

¹Saint Petersburg National Research University of Information Technology, Mechanics, and Optics, Department of Food Biotechnology (Vegetable stock), Lomonosova street 9, RU191002 St. Petersburg, Russia
²Federal State-funded Scientific Establishment, ‘Russian Academy of Sciences (RAS) Limnology Institute’ (INOZ RAN), Syevasťyanova street 9, RU196105 St. Petersburg, Russia
*Correspondence: nsedanco@yahoo.fr

Abstract:

This article is devoted to the effect of ultradispersed humate sapropel extracts, obtained from air-dry samples of sapropel, from Seryodka deposit (Pskov region, Russia) by alkaline extraction under the action of ultrasonic radiation, on microbial and physicochemical parameters of Distillers’ grain (DG) during storage. At the end of the distillation, wet DG was divided and treated with sapropel extract. The untreated sample served as a control. Both (treated and untreated) were then dried to 10% moisture content. Microbial and physicochemical parameters (moisture content, pH, titrable acidity (TA), acid value (AV) of fats) were assessed before storage of dried DG. A similar experiment was repeated after one week of storage but on microbial load. The microbial counts ranged from 2.3 × 104 CFU g-1 (untreated) to 1.77 × 104 CFU g-1 (treated) before storage while 2.5 × 104 CFU g-1to 2.18 × 104 CFU g-1 accounted for after a week of storage. The pH had increased from 4.5 ± 0.1 to 6.1 ± 0.1 before and after treatment respectively. TA likewise decreased from 3.2 ± 0.4 to 2.03 ± 0.06%. The results showed that sapropel extracts had effects on microflora and physicochemical parameters of DDG.

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779–782 A. Ince, Y. Vurarak and S.M. Say
An approach for determination of quality in hay bale and haylage
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An approach for determination of quality in hay bale and haylage

A. Ince¹*, Y. Vurarak² and S.M. Say³

¹Çukurova University, Faculty of Agriculture, Agricultural Machinery and Technologies Engineering Department, TR 01330 Balcali-Adana, Turkey
²Eastern Mediterranean Agricultural Research Institute, P. Box: 45 Adana, Turkey
³Çukurova University, Faculty of Agriculture, Agricultural Machinery and Technologies Engineering Department, TR 01330 Balcali-Adana, Turkey
*Correspondence: aince@cu.edu.tr

Abstract:

 In this study, a new approach for faster determination of quality in hay bale and haylage was aimed. To this end, the relationships between bale densities, dry matter (DM), pH content and penetrometer values in hay bale and haylage were investigated. The mixture of caramba (Lolium multiform cv Caramba) and berseem clover (Trifolium alexandrinum L) was used as forage material. It was harvested by using two different harvesting methods and stored as dry hay and haylage. The penetrometer values were measured at four different points on bales. It was obtained that the pH content decreased with increase in bale density (R2 = 0.86) and with decrease in DM content (R2 = 0.86). The values measured at vertical-middle point gave higher correlation with density and pH contents.

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759-768 T. Albert, K. Karp, M. Starast and T. Paal
The effect of mulching and pruning on the vegetative growth and yield of the half-high blueberry
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The effect of mulching and pruning on the vegetative growth and yield of the half-high blueberry

T. Albert¹, K. Karp¹, M. Starast¹ and T. Paal²

¹Estonian University of Life Sciences, Institute of Agricultural and Environmental
Sciences , Kreutzwaldi 1A, 51014 Tartu, Estonia
²Estonian University of Life Sciences, Institute of Forestry and Rural Engineering,
Kreutzwaldi 1A, 51014 Tartu, Estonia, e- mail: tairi.albert@emu.ee

Abstract:

The aim of this research was to determine the influence of different mulches (peat, sawdust, plastic) and different pruning methods (moderate, severe) on the growth and yield of the half–high blueberry (Vaccinium corymbosum x Vaccinium angustifolium) ´Northblue´. The effect of a mixture of soil and peat was studied in the case of peat alone and peat and plastic mulches. The experiment was established in 1996 in South Estonia and in 2002 blueberry bushes were pruned. The results of the study showed that mulching significantly influenced nutrient content and pH. Depending on the mulch, the soil pH ranged from 4.5 to 6.1 – there was more acid soil in the peat treatment. The use of mulches had some influence on productivity of pruned half-high blueberry plants. When peat was applied a canopy of pruned plants recovered very well after one year. Within three years the plants had the same yield as un-pruned variants but four years after pruning the yield was highest in the variants where peat was applied. Plastic mulch is not suitable for blueberries: it decreases the yield and four years after pruning the normal plant growth in our study had not recovered. Severe pruning is more suitable for half-high blueberry fruiting plants in northern climate conditions.

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233-238 A. Dastikaitė, A. Sliesaravičius and N. Maršalkienė
Sensibility of two hairy vetch (Vicia villosa Roth.) genotypes to soil acidity
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Sensibility of two hairy vetch (Vicia villosa Roth.) genotypes to soil acidity

A. Dastikaitė¹, A. Sliesaravičius¹ and N. Maršalkienė²

¹Department of Crop Science and Animal Husbandry
²Laboratory of Agrobiotechnology, Lithuanian University of Agriculture, Studentų 11,LT-4324, Akademija, Kaunas distr., Lithuania;e-mail: nijole.petraityte@delfi.lt

Abstract:

Vetches are grown for pastures and mixtures with grain for forage. Hairy vetch is a legume primarily used for soil improvement and bank stabilization, is well adapted to organic cultivation and grows well on a wide range of soil types – on sandy, nitrogen depleted and lightly acidic soils. The analysis of hairy vetch sensibility to soil pH parameters was performed with phyto-cameras at the Lithuanian Institute of Horticulture in 2005–2006. The experiments were conducted with hairy vetch variety „Pūkiai‟ and wild population sample No.34, and covered investigation of vetch sensibility to the substrates with pH from 6.5 down to 3.3. The greatest hairy vetch viability and productivity were observed in the substrates with pH 5.8–5.5, and were most inhibited in the substrates with pH 3.3–3.5. Vetch No.34 tolerated substrates with pH 5.8–5.2 better than vetch „Pūkiai‟, whereas vetch „Pūkiai‟ tolerated substrates with pH 6.5 and 3.3 relatively better than vetch No.34.

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517-529 T. Łoboda and E. Wołejko
Effect of pH and Al3+ concentration on growth of spring brewer’s barley
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Effect of pH and Al3+ concentration on growth of spring brewer’s barley

T. Łoboda¹ and E. Wołejko²

¹ Sanitary Biology and Biotechnology Department, Bialystok Technical University, Wiejska45E, 15-351, Bialystok, Poland; e-mail: lobodat@vp.pl
² Institute of Agriculture, Suwalki Higher Vocational School, Noniewicza 10, 16-400 Suwalki,Poland; e-mail: elzbietawolejko@wp.pl

Abstract:

The aim of the study was to check reaction of spring brewer’s barley seedlings to the pH and aluminium concentration of the growing medium. Seedlings of four cultivars of barley (Madonna, Orthega, Philadelphia and Rasbet) were grown at 4 levels of pH (3, 4, 5 and 6) and under 3 doses of Al3+ (0, 150 and 300 µmol dm-3). Significant differences in dry matter of roots and shoots were found for the studied cultivars and plants grown at different pH and concentrations of Al3+. Cv. Madonna had the highest tolerance to aluminium ions at low pH (3 and 4) of the medium and also the highest chlorophyll content in the leaves among those studied. With an increase of aluminium concentration, phosphorus content in dry matter of the leaves decreased from 0.66% in control plants to 0.52% under 300 μmol Al3+ dm-3 and the magnesium content decreased from 0.16% in control to 0.12% under 150 μmol Al3+ dm-3 and 0.10% under 300 μmol Al3+ dm-3.

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