Uticaj fosfornih đubriva na prinos i sadržaj kadmijuma u krompiru

This study evaluated the effect of different types and rates of phosphorus fertilizers on yield and cadmium content of potato on a slightly alkaline alluvium soil. Results show that the highest yield was obtained under treatment with monoammonium phosphate (manufactured in Russia) and the lowest under Bulgarian TSP treatment. The highest total cadmium was found in potato tubers treated with Bulgarian diammonium phosphate, in contrast to the lowest measured values under Russian DAP treatment.U radu je ispitivan uticaj različitih vrsta i doza fosfornog đubriva na prinos i sadržaj kadmijuma u krompiru, na zemljištu tipa aluvijum, slabo alkalne reakcije. Dobijeni rezultati pokazuju da je primenom monoamonijum-fosfata (poreklom iz Rusije) ostvaren najveći prinos, dok je najmanji prinos postignut sa primenom bugarstkog TSP. Najveći sadržaj ukupnog kadmijuma u krtolama krompira utvrđen je primenom bugarskog diamonijum-fosfata, a najmanji primenom ruskog DAP-a

Agrohemijske osobine mladog karbonatnog fluvisola u slivu reke Ljig

Morphological study of several open profiles different depths and their analysis showed that land in the Ljig River belongs to the type of young alluvial soil (fluvisol) and subtype young carbonate alluvial soil. Based on the agrochemical analysis, can be concluded that this land is mostly poor and poorly supplied with humus, weakly to moderately alkaline, poor available phosphorus and mostly medium provided available potassium. The total content of Cu, Zn, Pb and Cd within the maximum allowable concentration, while the content of Ni and Cr above these values.Morfološkim proučavanjem nekoliko otvorenih profila i poluprofila različite dubine i njihovom analizom utvrđeno je da zemljište u slivu reke Ljig pripada tipu mladog aluvijalnog zemljišta (fluvisola) i to podtipu mladog karbonatnog aluvijalnog zemljišta. Na osnovu urađenih agrohemijskih analiza može se zaključiti da je ovo zemljište uglavnom siromašno do slabo obezbeđeno humusom, slabo do srednje alkalne reakcije, siromašno lakopristupačnim fosforom i uglavnom srednje obezbeđeno lakopristupačnim kalijumom. Ukupni sadržaj Cu, Zn, Pb i Cd je u okviru maksimalno dozvoljenih koncentracija, dok je sadržaj Ni i Cr iznad ovih vrednosti

Uticaj različite doze i načina primene mineralnih đubriva na prinos krompira

This study involved use of six application rates and different methods of NPK fertilization in potato cultivar ’Carrera’ on a leached soil. The highest total yield of potato was obtained under treatment with 1,200 kg/ha NPK 16:16:16 combined with 200 kg/ha CAN. Different methods of NPK treatment gave no significant difference in potato yield at the same fertilizer rate, but the yield was somewhat increased by applying part of the fertilizer pre-plant and part of it in-furrow, compared to the in-furrow treatment with the full application rate at planting.Ispitivanja su izvedena primenom šest različitih doza i načina primene NPK-đubriva kod sorte krompira Karera na lesiviranom zemljištu. Najveći ukupni prinos krompira ostvaren je na varijanti gde je izvršena kombinovana primena 1200 kg/ha NPK đubriva 16:16:16 i 200 kg/ha KAN-a. Primenom različitih načina unošenja NPK đubriva nisu utvrđene značajne razlike u prinosu krompira kod iste doze, ali je nešto veći prinos postignut na varijantama gde je deo đubriva primenjen predsetveno a deo u brazde, u odnosu na primenu celokupne količine u brazde za vreme sadnje

Prinos i kvalitet krtola krompira u zavisnosti od đubrenja

Research on the effect of different rates and methods of application of mineral NPK fertilizers on the yield and quality of potato variety ‘Carrera’ was conducted on a luvisol of the Radočelo Mountain massif. Treatments included an unfertilized control, NPK 16:16:16 (1500 kg ha) applied in-furrow at planting, NPK 16:16:16 (1200kg ha-1) applied in-furrow at planting, and NPK 16:16:16 applied at 700 kg ha-1 during seedbed preparation and 500 kg ha-1 in-furrow at planting. Mineral fertilizers led to a very significant increase in tuber yield compared to the control, giving the highest total yield under 1500 kg ha-1 NPK treatment. Results on the nutritional value of potato tubers showed that the levels of tested nutrients were higher in the skin than in the flesh. The concentrations of tested nutrients in potato tubers were highest at the highest NPK fertilizer rate.Ispitivanje uticaja različitih doza i načina primene mineralnog đubriva NPK 16:16:16 (1500 kg ha-1, primenjenog u brazde zavreme sadnje, 1200 kg ha-1, primenjenog u brazde za vreme sadnje i 700 kg ha-1 za vreme predsetvene pripreme uz 500 kg ha-1 u brazde za vreme sadnje) na prinos i kvalitet krompira sorte Karera izvedeno je na lesiviranom zemljištu (luvisolu) planinskog masiva Radočelo. Primenjena mineralna đubriva su uticala na značajno povećanje prinosa u odnosu na kontrolu, pri čemu je značajno veći prinos postignut na varijanti sa većom količinom đubriva u odnosu na ostale varijante. Primena iste doze NPK đubriva različitim načinima unošenja nije značajno uticala na prinos i kvalitet krtola krompira. Analizom krtola krompira je utvrđeno da je sadržaj svih elemenata bio veći u kori u odnosu na srž krtole, kao i da je najveći sadržaj bio na varijanti sa najvećom dozom NPK đubriva

FTIR analysis and the effects of alkyd/melamine resin ratio on the properties of the coatings

Alkyd/melamine resin mixtures are mainly used in industrial baking enamels. The effects of the alkyd/butylated melamine resin ratio (from 90/10 to 50/50) and curing temperature (from 110 to 180°C) on the crosslinking and properties of the coating are presented in this paper. The curing reactions through functional groups of resins were monitored by FT-IR spectroscopy. The hardness, elasticity, degree of adherence and gloss were also determined. Optimal coating properties could be achieved with an alkyd/melamine resin ratio of 80/20, a curing temperature of 150°C and a curing time of 20 min

Synthesis of "in situ" reinforced silicon nitride composites

The objective of this work was to investigate the effect of two different sintering additives (CeO2 and Y2O3 + Al2O3), sintering time and amount of beta-Si3N4 seeds on the densification. mechanical properties and microstructure of self-reinforced Si3N4 based composites obtained by pressureless sintering. Preparation of beta-Si3N4 seeds, also obtained by a pressureless sintering procedure. is described. Samples without seeds were prepared for comparison. The results imply that self-reinforced silicon nitride based composites with densities close to the theoretical values and with fracture toughness of 9.3 MPa m(1/2) can be obtained using a presureless sintering procedure

Synthesis of in situ reinforced silicon nitride composites

The objective of this work was to investigate the effect of two different sintering additives (CeO2 and Y2O3 + Al2O3), sintering time and amount of b-Si3N4 seeds on the densification, mechanical properties and microstructure of self-reinforced Si3N4 based composites obtained by pressureless sintering. Preparation of b-Si3N4 seeds, also obtained by a pressureless sintering procedure, is described. Samples without seeds were prepared for comparison. The results imply that self-reinforced silicon nitride based composites with densities close to the theoretical values and with fracture toughness of 9.3 MPa m1/2 can be obtained using a presureless sintering procedure

Differential expression and localization of Ankrd2 isoforms in human skeletal and cardiac muscles

Four human Ankrd2 transcripts, reported in the Ensembl database, code for distinct protein isoforms (360, 333, 327 and 300 aa), and so far, their existence, specific expression and localization patterns have not been studied in detail. Ankrd2 is preferentially expressed in the slow fibers of skeletal muscle. It is found in both the nuclei and the cytoplasm of skeletal muscle cells, and its localization is prone to change during differentiation and upon stress. Ankrd2 has also been detected in the heart, in ventricular cardiomyocytes and in the intercalated disks (ICDs). The main objective of this study was to distinguish between the Ankrd2 isoforms and to determine the contribution of each one to the general profile of Ankrd2 expression in striated muscles. We demonstrated that the known expression and localization pattern of Ankrd2 in striated muscle can be attributed to the isoform of 333 aa which is dominant in both tissues, while the designated cardiac and canonical isoform of 360 aa was less expressed in both tissues. The 360 aa isoform has a distinct nuclear localization in human skeletal muscle, as well as in primary myoblasts and myotubes. In contrast to the isoform of 333 aa, it was not preferentially expressed in slow fibers and not localized to the ICDs of human cardiomyocytes. Regulation of the expression of both isoforms is achieved at the transcriptional level. Our results set the stage for investigation of the specific functions and interactions of the Ankrd2 isoforms in healthy and diseased human striated muscles