Fulltext search in archive
Results 151 to 180 of 356:
Vliv stupňovaných dávek selenu v půdě na výnosotvorné prvky a obsah selenu u bramborMiroslav Jůzl, Jaroslav Hlušek, Petr Elzner, Tomáš LošákActa Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(1), 71-80 | DOI: 10.11118/actaun200755010071 In 2004 and 2005 we explored the effect of graded doses of selenium in the soil (0, 12, 24, 48 and 72 kg Se.ha-1) on yield-forming parameters (total plant weight, number of stems per hill, number of tubers per hill and hectare yields) in two varieties of potatoes of different vegetation periods. The content of selenium as an important anti-oxidant was monitored in potato tubers and tops. Selenium in the form of sodium selenite was applied in the respective doses into the soil before planting the potatoes. Samples for growth and chemical analyses were taken after 90 and 99 days of vegetation (variety Karin and Ditta, respectively). Increasing doses of selenium had a negative effect on most of the yield-forming parameters. With an increasing dose of Se the hectare yields as well as the number of tubers in the hill and total weight of the plant decreased. Chemical analyses were performed using the AAS method and showed that the concentration of selenium in the individual parts of the potato plant increased with increasing Se doses in the soil. The content of selenium in tubers of the variant Se72 (4.13 mg Se.kg-1 of dry matter) increased as much as 20 times when compared to the control (0.22 mg Se.kg-1 of dry matter). |
VÝNOS A KVALITA LNU SETÉHO OLEJNÉHO (LINUM USITATISSIMUM L.) V RŮZNÝCH PĚSTITELSKÝCH PODMÍNKÁCHTomáš Středa, Marie BjelkováActa Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(1), 153-164 | DOI: 10.11118/actaun200755010153 The aim of this study was on the basis of the field experiment in two different agroclimatic localities, two planting options (low and high input) and during three years find out the seed yield, seed oil content and composition of fatty acid in linseed oil (Linum usitatissimum L.), variety Lola (LinolaTM). By the help of standard laboratory analyses for paint parameter evaluation judge suitability of using the oil for painting industry. Linseed yield varied from 0.29 t.ha-1 to 2.35 t.ha-1. Statistical significant differences (P = 0.01) were found out for localities, years and planting options. Average seed oil content varied from 36.6% to 44.0%. Influence of locality was not significant, influence of year and planting option to seed oil content was highly significant (P = 0.01). Content of linoleic acid in oil was influenced mainly by locality and planting option and varied from 75.86% to 76.78%. Laboratory painting-technological evaluation of oils and alkyd resin experimental sample made for suitability of using low linolenic oil of linseed, variety Lola for production of non-yellowing alkyds and enamels. |
Vliv uhelných popelů na úroveň výnosu a kvalitu kukuřice. Část 1. Těžké kovy.Jacek Antonkiewicz, Tomáš LošákActa Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(1), 7-16 | DOI: 10.11118/actaun200755010007 The studies aimed at identification of various ash doses effect on the amount of yield and concentrations of Cr, Zn, Pb, Cu, Cd and Ni in maize. The studies were conducted as a pot experiment on mineral soil, to which ash doses of between 13.33 and 800.0 g∙pot-1 were supplied in proportions corresponding to quantities between 10 and 600 t∙ha-1. The amount of maize yield was diversified and depending on the treatment ranged between 35.59-121.64 g d.m.∙pot-1. Ash dose of 13.33 g.pot-1 significantly affected an increase in maize yield, while the dose over 26.67 g.pot-1 and equivalent to over 20 t.ha-1 applied to the soil markedly declined maize yield. Element concentrations in maize was diversified, depending on the treatment and plant part, and fluctuated from 0.32-3.48 mg Cr; 13.45-341.19 mg Zn; 0.50-5.02 mg Pb; 1.83-22.10 mg Cu; 0.02-1.71 mg Cd and 0.15-6.07 mg Ni∙kg-1d.m. It was found that with increasing ash dose Cr and Cu content increased systematically, whereas Zn, Pb, Cd and Ni concentrations in maize decreased. The content of investigated heavy metals in maize aboveground parts fulfilled the norms for good quality fodder. Under the influence of growing ash doses added to the soil a regularly declining Cr, Zn, Pb, Cd and Ni uptake by maize aboveground parts was observed. |
VLIV ÚROVNĚ DUSÍKATÉ VÝŽIVY A FUNGICIDNÍHO OŠETŘENÍ NA VÝNOS A VYBRANÉ UKAZATELE KVALITY ZRNA OZIMÉ PŠENICEAlena Bezdíčková, Luděk HřivnaActa Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(1), 25-38 | DOI: 10.11118/actaun200755010025 In 2001-2004 an influence of gradually increased portions of nitrogen (100-130-160 kg/N.ha-1) applied on the wheat variety Ebi in combination with the modified fungicidal protection in the yield and the selected quality grain parameters were observed within the small-plot field trials. Nitrogenous fertilizers according to the amount of nitrogen contained were applied in 2-4 terms during vegetation in regeneration (55kg/N.ha-1), 1st production (45kg/N.ha-1), 2nd production (30kg/N.ha-1) and qualitative portion (30kg/N.ha-1). The fungicidal protection was based on the equal treatment in the phase of BBCH 37 and with regard to the varieties different treatment in the phase of BBCH 55. The dependence on the year was proved at all observed parameters. Higher intensity of nitrogenous fertilization had no decisive impact on the yields. From the point of view of increased yields, the second production nitrogenous fertilization had the strongest impact; it increased the grain yields by 0.084-0.461 t./ha-1. Higher intensity of nitrogenous fertilization positively influenced the baker's grain quality. The increased portions of nitrogen decisively increased the volume of N-substances in all trial years. The second production nitrogenous fertilization increased the N-substances volume from 0.1 to 0.8%. Qualitative additional fertilization increased their volume from 0.26 to 1.38%. Higher N portions increased sedimentation in most cases. The falling number was not considerably influenced. The mechanical grain qualities (volume weight, number full grains, and GTW) were relatively less influenced than the baker's quality by the nitrogenous fertilization. |
International Comparison of Wheat Cultivation Costs 2010-2012Bohdana Janotová, Vojtěch TamášActa Univ. Agric. Silvic. Mendelianae Brun. 2015, 63(4), 1261-1267 | DOI: 10.11118/actaun201563041261 |
Modelling Claim Frequency in Vehicle InsuranceJiří ValeckýActa Univ. Agric. Silvic. Mendelianae Brun. 2016, 64(2), 683-689 | DOI: 10.11118/actaun201664020683 |
Occurrence of Erosion-Effective Rain in the Brno AreaSilvie Kozlovská, František TomanActa Univ. Agric. Silvic. Mendelianae Brun. 2016, 64(5), 1583-1591 | DOI: 10.11118/actaun201664051583 |
Implementing Lean Production - Application of Little's LawMichal Medonos, Marie JurováActa Univ. Agric. Silvic. Mendelianae Brun. 2016, 64(3), 1013-1019 | DOI: 10.11118/actaun201664031013 |
The Heckscher-Ohlin Model and the Performance of Cocoa Products in NigeriaNahanga VerterActa Univ. Agric. Silvic. Mendelianae Brun. 2016, 64(6), 2161-2172 | DOI: 10.11118/actaun201664062161 |