ÚRODA A KVALITA ČAKANKY (CICHORIUM INTYBUS L.) V ZÁVISLOSTI OD ODRODY A FOLIÁRNEJ APLIKÁCIE ATONIKU A POLYBORU 150

The influence of variety and foliar applications of Atonik and Polybor 150 on root yield and inulin content in root of chicory (Cichorium Intybus L.) plant were observed in field polyfactorial experiment. The field trials were established on experimental station Dolná Malanta in warm maize production area in 2005 and 2006 years. The root yield and inulin content were statistically high significantly influenced by year’s weather conditions. In term of obtained root yield and inulin content in root the combination of foliar preparations on variant B (Atonik: 0.4 l ha-1 in 2nd post-emergence herbicide application; Atonik + Polybor 150: 0.6 + 2.5 l ha-1 in 3rd post-emergence herbicide application; Polybor 150: 2.5 l ha-1 in 1st fungicide treatment) was shown to be optimal in given agri-ecological conditions. Biological material affected the formation of yield parameters very differently. The highest yield of root was observed at variety Fredonia Nova and inulin content in root at variety Maurane (both statistically significant).V poľných polyfaktorových experimentoch bol sledovaný vplyv odrody a foliárnej aplikácie Atoniku a Polyboru 150 na úrodu koreňa a obsah inulínu v koreni čakanky. Poľný experiment bol uskutočnený v rokoch 2005 a 2006 na experimentálnej stanici Dolná Malanta v teplej kukuričnej výrobnej oblasti na stredne ťažkej hnedozemi. Poveternostné podmienkami stanovišťa ovplyvnili výšku úrody koreňa, ako aj obsah inulínu v koreni štatisticky vysoko preukazne. V daných agroekologických podmienkach bol vplyv termínu foliárnej aplikácie Atoniku a Polyboru 150 na úrodu koreňa a obsah inulínu v koreni najvýznamnejší v experimentálnom variante B (Atonik 0,4 l.ha-1 - druhá postemergentná aplikácia herbicídu; Atonik + Polybor 150: 0,6 + 2.5 l.ha-1 - tretia postemergentná aplikácia herbicídu; Polybor 150: 2,5 l.ha-1 - prvé fungicídne ošetrenie). Biologický materiál ovplyvňoval formovanie úrodových parametrov rozdielne. Vplyv odrody na úrodu koreňa bol štatisticky signifikantný. Najvyššia úroda bola zaznamenaná pri odrode Fredonia Nova a najvyšší obsah inulínu v koreni bol pri odrode Maurane

YIELD AND QUALITY OF CHICORY (CICHORIUM INTYBUS L.) IN DEPENDENCE ON VARIETY AND FOLIAR APPLICATION OF ATONIK AND POLYBOR 150

The influence of variety and foliar applications of Atonik and Polybor 150 on root yield and inulin content in root of chicory (Cichorium Intybus L.) plant were observed in field polyfactorial experiment. The field trials were established on experimental station Dolná Malanta in warm maize production area in 2005 and 2006 years. The root yield and inulin content were statistically high significantly influenced by year’s weather conditions. In term of obtained root yield and inulin content in root the combination of foliar preparations on variant B (Atonik: 0.4 l ha-1 in 2nd post-emergence herbicide application; Atonik + Polybor 150: 0.6 + 2.5 l ha-1 in 3rd post-emergence herbicide application; Polybor 150: 2.5 l ha-1 in 1st fungicide treatment) was shown to be optimal in given agri-ecological conditions. Biological material affected the formation of yield parameters very differently. The highest yield of root was observed at variety Fredonia Nova and inulin content in root at variety Maurane (both statistically significant)

PROPERTIES OF Al2O3 FOAMS OPTIMIZED BY FACTORIAL DESIGN

Alumina foam was prepared by the direct foaming method. The foam was stabilized by in situ partially hydrophobized particles of Al2O3. Dodecylbenzenesulphonic acid was used for hydrophobization and it also acted as a foaming agent. The composition of the starting suspensions (Al2O3, boehmite, dodecylbenzenesulphonic acid and water) were varied according to factorial design. The resulting properties observed were: foam ratio, foam shrinkage on drying and sintering, bulk density and porosity of ceramic foams, average pore size and compressive strength. The final properties of foams dependent on statistically significant factors (boehmite, dodecylbenzenesulphonic acid) were evaluated by common software. The foam ratio decreased and the bulk density of the alumina foams increased with increasing quantity of the dodecylbenzenesulphonic acid (0.1-0.2 wt.%). Bulk density of alumina foams ranged from 88 to 155 kg/m3 and average pore size reached 111 μm to 215 μm depending on the quantity of the dodecylbenzenesulphonic acid. The microstructure of ceramic foams reached high porosities ranging from 96 to 98 %. The compressive strength of the alumina foams increased with increasing quantity of boehmite (1-3 wt.%) and it reached values of 333 kPa

Unutilized potential of Erofeev's equation

Abstract The article analyzes the general equation of chemical kinetics, whose specific case is ofte

Influence of temperature and moisture conditions of locality on the yield formation of sunflower (Helianthus annuus L.)

Field polyfactorial experiments were realized on fields of the Agricultural Co-operative in Nitrianska Blatnica in years 2007−2009. Experimental field is located in the maize production area (climatic region: warm; climatic sub region dry; climatic zone: warm, dry with mild winter and long sunshine) in altitude 250 m above sea level, with brown soil. We observed the influence of both temperature and moisture conditions of experimental area on sunflower yield of achenes (conventional, medium-late hybrids: NK Brio, NK Armoni). Preceding crop of sunflower (Helianthus annuus L.) every experimental year was wheat (Triticum aestivum L.). Technological system of sunflower cultivation was realized in accordance with conventional technology of cultivation. The basic fertilization was made by balance method on the base of agrochemical soil analysis for expected yield 3 t.ha−1. The meteorological data were got out from agrometeorological station of the Central Controlling and Testing Institute in Agriculture in Veľké Ripňany. During every experimental year the change of inner energy (ΔU) was evaluated for thermodynamic characteristic analysis (security of the temperature and moisture) and the impact of changes on yield forming with maximal yield (Ymax in 2008) and minimal yield (Ymin in 2009). Achieved value of yield from thermal and precipitation energy introduces concrete energy amount, which is available in given period for concrete height of yield. From the results follow, the sunflower has got critical thermodynamic phase in the period of months from July to August. For the yield formation is requirement, that input power of precipitation prevailed over the thermal during moths July to August. Achieved results confirmed statistically high significant dependence of the yield on weather conditions and for high annual variations in climatic characteristics the consideration is needed about potential changes some agrotechnological measures of technological system of sunflower cultivation