Sadržaj i mobilnost mangana u kiselim zemljištima centralne Srbije

The paper gives an overview of many years ivesrigation of Mn status in acid soils of Central Serbia in the term of its content, mobility and availability to cultivated plants. Many studies have shown strongly expressed mobility and high availability of Mn in these soils. However, distribution and mobility of this element among soil layers, in various conditions of oxido – reduction, moisture and temperatures, were very heterogeneous. The largest presence of Mn in acid soils was in oxide fraction (over 50%).U radu je dat pregled višegodišnjeg proučavanja sadržaja, mobilnosti i pristupačnosti mangana u kiselim zemlјištima Centralne Srbije. Brojna istraživanja su pokazala jako izraženu mobilnost i visoku pristupačnost Mn u ovim zemljištima. Takođe, distribucija i mobilnost Mn u zemljišnim horizontima u različitim oksido-redukcijonim uslovima je bila veoma heterogena. Najveće prisustvo Mn u kiselim zemljištima je bilo u frakciji oksida (preko 50%)

Sadržaj (Ni) nikla u nadzemnom delu i zrnu različitih sorti strnih žita

To ensure safe food production, cultivar-specific traits of winter small grains were analysed in terms of mineral nutrition in order to determine differences between small grain (barley, oat and triticale) genotypes in the level of certain heavy metals (Ni). The kernel of mature small grain plants and their vegetative biomass were found to contain quite different levels of Ni, depending on genotype properties and fertilisation systems. Ni content in oat kernel was above toxic levels and cannot be used for safe food production. Barley and triticale samples complied with quality criteria in terms of their Ni levels.U cilju proizvodnje zdravstveno bezbedne hrane ispitivane su sortne specifičnosti ozimih strnih žita, u odnosu na mineralnu ishranu, kako bi se ustanovile međusobne razlike genotipova strnih žita (ječma, ovsa i tritikalea), u odnosu na zastupljenost pojedinih teških metala (Ni). Konstatovano je da zrno zrelih biljaka strnih žita i vegetativna masa imaju veoma različite sadržaje Ni, u zavisnosti od osobina genotipova i sistema đubrenja. Sadržaj Ni u zrnu ovsa, bio je iznad toksičnih sadržaja i ne može se koristiti za proizvodnju zdravstveno bezbedne hrane. Sa aspekta sadržaja Ni u uzorcima ječma i tritikalea, možemo zaključiti da ispitivani uzorci zadovoljavaju kriterijume kvaliteta

Comparison of field performance and fruit quality among newly released Italian June-bearing strawberry cultivars

The aim of this study was to compare newly released June-bearing strawberry cultivars (‘Quicky’, ‘Sandra’, ‘Lofty’, ‘Nadja’ and ‘Aprica’) in terms of their phenology, vegetative growth, productivity and fruit quality to identify their potential for wider cultivation. A field study was conducted in a strawberry plantation established in July 2020 in double rows on beds covered with black polyethylene foil (Šid, Serbia). The cultivars were evaluated in 2021–2022 for their flowering and ripening time, productivity, plant growth, biometrical and nutritional fruit traits (soluble solids content – SSC, total acids – TAs, vitamin C, total anthocyanins – TACY, total phenolics – TPC and total antioxidant capacity – TAC). The cultivar ‘Quicky’ started to ripen earliest, while ‘Aprica’ was the latest in both experimental years. The number of branch crowns per plant was significantly higher in ‘Sandra’ and ‘Lofty’, whereby ‘Sandra’ had also the highest number of leaves per rosette (41.5) in comparison with the other tested cultivars. The cultivar ‘Aprica’ was superior in terms of productivity (1061 g/plant and 4.67 kg/m2 ), fruit weight (29.9 g) and fruit shape index (1.15). Contrary to this, ‘Nadja’ was the least productive cultivar (608 g/plant and 2.68 kg/m2). The cultivars ‘Lofty’ and ‘Sandra’ showed the highest SSC values and were also characterized by a considerably high level of TPC (1.29 mg GAE eq g-1 FW) and TACY (24.4 mg pg-3-g eq 100 g-1 FW), respectively. Variability among the tested cultivars could serve as an important criterion for the selection of new high-performing cultivars for a given growing region

Uticaj kalcizacije i đubrenja na prinos i iskorišćavanje azota i fosfora biljkama ječma na zemljištu tipa pseudoglej

This paper presents the results of studying the influence of liming and fertilization on yield and utilization of nitrogen and phosphorus in tested genotypes of winter barley grown on soil (type pseudogley) with low pH values. During the three-year long investigation was carried out on the field of Agricultural-chemical school "Dr. George Radic" at the place Kraljevo. The results indicated that the highest effect to yield and coefficient of utilization of N and P2O5 were obtained by application fertilizer prepared by use of NPK, lime and manure (N- 80 kg ha-1, P2O5 -100 kg ha-1, K2O-80 kg ha-1 + CaCO3-5000 kg ha-1 + manure – 20000kg ha- 1). On the base of studied parameters the barley cultivar NS565 was more tolerant to adverse chemical soil characteristics (low pH, low P2O5 content and a high content of mobile Al) and can be recommended as a suitable genotype for barley production on acid soils, especialy after liming of soil.U radu su prikazani rezultati proučavanja uticaja kalcizacije i đubrenja na prinos i iskorišćavanje azota i fosfora ispitivanim genotipovima ozimog ječma na zemljištu niske pH vrednosti tipa pseudoglej. Trogodišnja istraživanja su izvedena u lokalitetu Kraljeva na imanju Srednje poljoprivredno-hemijske škole "dr Đorđe Radić". Dobijeni rezultati su pokazali da je najveći ekekat na prinos i koeficijent iskorišćavanja N i P2O5 iz đubriva ostvaren kombinovanom upotrebom NPK, krečnog i stajskog đubriva (80 kg Nha-1, 100 kg P2O5ha-1, 80 kg K2Oha-1+5.0 t CaCO3ha-1+20 tha-1 stajnjaka). Na osnovu proučavanih parametara sorta ozimog ječma NS 565 je bila tolerantnija na nepovoljne hemijske karakteristike zemljišta (niska pH, nizak sadržaj P2O5 i visok sadržaj mobilnog Al) i može se preporučiti kao pogodan genotip za proizvodnju ječma na kiselim zemljištima, naročito posle njihove kalcizacije

Uticaj sezone i genotipa na prinos i kvalitet zrna kod ozimih sorti pšenice

The small-scale trials over two years (2011/12th and 2012/13th), examined the six varieties of winter wheat (Vizija, Takovčanka, Planeta, Kruna and Perfekta). Studied grain yield (t ha-1), weight of 1000 grains (g) and test weight (kg hl-1). Estimates were statistically significant differences for grain yield between varieties and years. Cultivars Vizija, Takovčanka and the Planeta have conducted surveys have shown a high degree of adaptability conditions of production of wheat and had a satisfactory yield in the examined vegetation seasons.U mikroogledima tokom dve godine (2011/12.-2012/13.), ispitivano je šest sorti ozime pšenice (Vizija, Takovčanka, Planeta, Kruna i Perfekta). Istraživan je prinos zrna (t ha-1), masa 1000 zrna (gr) i hektolitarska masa (kg hl-1). Procenjene su statistički signifikantne razlike za prinos zrna između sorti i godina. Sorte Vizija, Takovčanka i Planeta su u sprovedenim ispitivanjima pokazale visok stepen adaptabilnosti uslovima proizvodnje pšenice i imale su zadovoljavajući prinos u ispitivanim godinama

Uticaj mineralne ishrane na prinos ozime pšenice (Triticum aestivum L.)

Investigations were carried out during the 2006/2007 year on stationary field trial, the Center for Small Grains in Kragujevac. The objective of this study was to investigate the influence of mineral nutrition on the yield of winter wheat varieties (Lazarica, Takovčanka, Kg 56S, Kg 100 i Ana Morava). For these investigations were conducted two experiments (N1-80 kg ha-1 and N2-120 kg ha-1). Analysis of variance indicates very significant effects of cultivar on the grain yield, 1000-grain weight and test weight. Analysis of variance for the impact of nitrogen rates (N1 and N2) on investigated traits was found that doses of nitrogen in combination with NPK fertilizers significantly affected only on grain yield.Istraživanja su izvedena tokom 2006/2007. godine na stacionarnom poljskom ogledu, Centra za strna žita u Kragujevcu. Cilj ovog istraživanja je bio da se ispita uticaj mineralne ishrane na prinos ozime pšenice sorte (Lazarica, Takovčanka, Kg 56S, Kg 100 i Ana Morava). Za ova istraživanja su izvedena dva ogleda (N1-80 kg ha-1 i N2-120 kg ha-1). Analizaom varijanse je utvrđen vrlo visoko značajan uticaj sorte na prinos, masu 1000 zrna i hektolitarsku masu. Analizom varijanse za uticaj doze azota (N1 i N2) na ispitivane osobine utvrđeno je da su doze azota u kombinaciji sa NPK đubrivima značajno uticale samo na prinos zrna

Varijabilnost prinosa različitih sorti ozimog ječma

This paper presents the results of winter barley cultivars (Rekord, Grand, NS 565 and Nonijus). Varieties were grown in the experimental field of Agro-chemical school "Dr. Djordje Radic"-Kraljevo during two growing seasons. By examining the physical properties of grain, Nonijus was achieved the highest average yield in both growing seasons (4.140 t ha-1, 5.706 t ha-1). The significant difference in the significance between the impact of the year on grain quality in the examined barley varieties was significant for grain yield. The established differences in significance from the point of view of the genotype to the average values of grain yield were statistically not significant.U radu su prikazani rezultati ispitivanja ozimih sorti ječma (Rekord, Grand, NS 565 i Nonijus). Sorte su gajene na oglednom polju Poljoprivredno-hemijske škole „Dr Đorđe Radić“-Kraljevo, tokom dve vegetacione sezone. Ispitivanjem fizičkih osobina zrna, sorta Nonijus je ostvarila najveći prosečan prinos zrna u obe vegetacijske sezone (4,140 t ha-1; 5,706 t ha-1). Utvrđena razlika značajnosti između uticaja godine na kvalitet zrna kod ispitivanih sorti ječma, bila je značajna za prinos zrna. Ustanovljene razlike značajnosti sa stanovišta uticaja genotipa na prosečne vrednosti prinosa zrna statistički nisu bile signifikantne

Parametri rodnosti različitih sorti jarog ječma (Hordeum vulgare L)

This paper presents the results of Kragujevac spring barley varieties (Jadran and Dunavac). The experiment was conducted at the experimental field of the Center for Small Grains, Kragujevac during two growing seasons. Investigated the grain yield (t ha-1), 1000 grain weight (g) and test weight (kg hl-1). By examining the physical properties of grain, variety Jadran is made slightly larger two-year average grain yield (3.127 t ha-1). The average value for 1000 kernel weight and test weight in both years was slightly higher in the variety Dunavac.U radu su prikazani rezultati istraživanja kragujevačkih jarih sorti ječma (Jadran i Dunavac). Ogled je postavljen na oglednom polju Centra za strna žita, Kragujevac tokom dve vegetacijske sezone. Istraživan je prinos zrna, masa 1000 zrna i hektolitarska masa. Prosečan prinos zrna u posmatranom dvogodišnjem periodu kretao se u intervalu od 2,674 t ha-1 do 3,127 t ha-1, dok se vrednost za masu 1000 zrna kretala u intervalu od 44,16 g do 44,48 g. Sorta Jadran je ostvarila nešto veći dvogodišnji prosečan prinos zrna (3,127 t ha-1). Prosečna vrednost za masu 1000 zrna i hektolitarsku masu u obe godine istraživanja bila je nešto veća kod sorte Dunavac

Uticaj godine na prinos i kvalitet zrna ozimih sorti pšenice

The small-scale trials over two years (2009/10th and 2010/11th), examined the six varieties of winter wheat (Vizija, Takovčanka, Kg 56 S, Kruna, Aleksandra and Planeta). Studied grain yield (t ha-1), weight of 1000 grains (g) and test weight (kg hl-1). Estimates were statistically significant differences for grain yield between varieties and years. Cultivars Vizija, Kg 56 S, Takovčanka and the Kruna have conducted surveys have shown a high degree of adaptability conditions of production of wheat and had a satisfactory yield in the examined vegetation seasons.U mikroogledima tokom dve godine (2009/10.-2010/11.), ispitivano je šest sorti ozime pšenice (Vizija, Takovčanka, Kg 56 S, Kruna, Aleksandra i Planeta). Istraživan je prinos zrna (t ha-1), masa 1000 zrna (gr) i hektolitarska masa (kg hl-1). Procenjene su statistički signifikantne razlike za prinos zrna između sorti i godina. Sorte Vizija, Kg 56 S, Takovčanka i Kruna su u sprovedenim ispitivanjima pokazale visok stepen adaptabilnosti uslovima proizvodnje pšenice i imale su zadovoljavajući prinos u ispitivanim godinama