Wyniki wyszukiwania

1

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Effect of fertilizer on soil reaction

100%

Skrastina L., Vucans R.

Zeszyty Problemowe Postępów Nauk Rolniczych

|

1998

|

tom 456

The aim of study was to determine the influence of growing fertilizer rates on soil reaction. Soil samples were taken from experimental plots, where different amounts of NPK fertilizers were applied for perennial grasses within 6 years (1986 - 1992). The experimental design was 12 treatments in 4 replications, and established in sod-gleysolic loamy sand. Potential acidification of soil as a result of fertilization was calculated based on CaCO₃ balance and obtained results validated with the analytical tests of topsoil (0 - 20 cm) and subsoil (20 - 40 cm) reaction before and after experiment. Obtained results showed low performance of data obtained by calculation CaCO₃ balance, thereby using only CaCO₃ balance, it is risky to forecast soil acidification. In spite ofthat the used fertilizer rates changed in the widely ranges between treatments (N₀P₀K₀ - N₃₀₀P₁₂₀K₂₄₀), fertilization had not significant influence on soil reaction.

2

The effect of fertilizers on growth and flowering of heterosis cultivars of Cyclamen persicum Mill. from Halios group

100%

Cieciora M., Czuchaj P., Szczepaniak S.

Acta Scientiarum Polonorum. Hortorum Cultus

|

2006

|

tom 05

|

nr 2

The aim of the experiment was to assess the effect of applied fertilizers: Hydrocote + Kristalon, Osmocote + Peters and Polyon + Hortimix on the length of the production period and the quality of two heterosis cultivars of Cyclamen persicum from Halios group during two years of the study late date cultivation. The experiment was conducted in the following cycles: 04.08.2003–12.01.2004 and 29.07.2004–30.12.2004. Plant growth was evaluated on the basis of the following characters: total height, plant diameter, the number of leaves, the weight of the aboveground part and tuber diameter. The following characters were assessed in the evaluation of flowering: earliness of the cultivar, flower development rate and the number of flowers and buds. The experiment was completed when most plants reached commercial value, i.e. after developing five flowers per plant. It was found that slow-release fertilizers did not have a significant effect on the growth and flowering of Cyclamen persicum from Halios group, only the application of fertilizer Osmocote resulted in an increase of plant diameter and weight. A bigger effect was found for the year of cultivation: bigger insolation during cultivation boosts growth. Earliness of flowering was not affected by the year of cultivation, cultivars formed similar numbers of flowers, whereas the rate of flower development depended on both factors and in the year with bigger insolation it was higher and resulted in the formation of a bigger number of flowers.

3

Impacts of organic and organo-mineral fertilizers on total phenolic, flavonoid, anthocyanin and antiradical activity of Okuzgozu (Vitis vinifera L.) grapes

67%

Ozdemir G., Kitir N., Turan M., Ozlu E.

Acta Scientiarum Polonorum. Hortorum Cultus

|

2018

|

tom 17

|

nr 3

A present study was conducted to determine the impacts of organic and organo-mineral fertilizers on total phenolic, flavonoid, anthocyanin and antiradical activities of Okuzgozu (Vitis vinifera L. cv.) grapes. Study treatments included organic fertilizers (green fertilizer (vetch), green fertilizer (barley), green fertilizer (vetch + barley), farmyard manure, bactoguard, lifebac NP, humanica) and organo-mineral fertilizers (bactolife quality organo, bactolife high organo, bactolife high organo, bactolife super organo power). The control treatment did not receive any application. The organic, and organo-mineral fertilizers applications positively influenced the total phenolic, flavonoid and anthocyanin productions, and antiradical activity (DPPH). The maximum total phenolic production was significantly higher under Bactolife Super Organo Power (785.49 µg GAE/mg in pulp) application, followed by those under bactolife high organo 5-5-5 (780.40 µg GAE/mg in pulp). The total flavonoid production in berry skin (34.26 µg QUE/mg), pulp (137.00 µg QUE/mg) and seed (23.52 µg QUE/mg) were the highest under the bactolife super organo power whereas the antiradical activities (DPPH) of berry pulp and seed were at the maximum level under the bactolife quality organo treatment. Total anthocyanin content of berry skin and pulp of Okuzgozu grape cultivar was the highest under the organic humanica.

4

Eﬀects of inorganic and foliar fertilizers on antioxidant capacity and flower yield of saﬀron (Crocus sativus L.)

67%

Abou Obaid Y. A., Traykov Zehirov G., Krasimirova Again-Stoyanova N., Ivanova Petrova M., Haddad R. H., Karam F. S., Shaban N. T., Dimova Vassilevska-Ivanova R.

Acta Agrobotanica

|

2022

|

tom 75

|

nr 1

5

The effect of NPK fertilisation on mineral phosphorus fraction content in soil

67%

Acta Agrophysica

|

2017

|

tom 24

|

nr 2

A field experiment, conducted on loess-derived gray-brown podzolic soil, evaluated the effect of different levels of intensive fertilization with nitrogen, phosphorus and potassium on the soil content of mineral phosphorus fractions which are the major but varying source of this nutrient for crop plants. Before the establishment of the experiment, the soil contained 77.2 mg P kg–1, 187 mg K kg–1, 44 mg Mg kg–1, and 1.18% of humus, whereas pHKCl was 4.9. The experiment consisted of twenty seven fertilization treatments – nine nitrogen and potassium fertilization treatment combinations, each in four replicates, were carried out in relation to three increasing levels of phosphorus fertilization. Phosphorus fraction was indicated with the modified Chang-Jackson method. Mineral nitrogen, phosphorus and potassium fertilization after timothy grass harvest significantly affected the easily soluble phosphate fraction content in soil. Phosphorus fertilization caused the highest increase, while this increase was lower in the case of potassium and nitrogen fertilization. Mineral fertilization (with nitrogen, phosphorus, and potassium) used in the experiment caused a significant increase of the content of aluminium phosphate fractions in soil. Evaluating iron phosphate fraction content in soil, it can be concluded that it was the most stable fraction and that mineral fertilization at increasing NPK rates essentially did not have any statistically proven effect on its occurrence. Among the three fertilizer nutrients applied (NPK), phosphorus and potassium fertilization caused a significant increase in calcium phosphate fraction content in soil. The application of nitrogen was not found to have such an effect. Mineral NPK fertilization significantly affected the total mineral phosphorus fraction content in soil. A systematic increase in the total fraction analysed was found primarily under the influence of phosphorus and potassium fertilization. Phosphorus applied as granulated triple superphosphate was primarily transformed in the soil into fractions of iron and aluminium phosphates, to lower extent into calcium phosphate fraction, and – to the lowest extent – into easily soluble phosphates fraction.

6

Influence of varying rates of fertilizers on the performance of cacao (Theobroma cacao) seedlings in the nursery

67%

Famuwagun I. B., Oladitan T. O.

International Letters of Natural Sciences

|

2016

|

tom 58

Effects of application of poultry manure, organo-mineral fertilizer, NPK soil or foliar applied at varying rates on cacao seedlings were studied in the nursery between January-May 2011 and December to April, 2012. Poultry manure at 40, 50 and 60g/plant significantly influenced cacao seedlings height and number of leaves over other treatments. The effect of organo-mineral fertilizer application at 50 and 60g per plant on the number of leaves was also significantly better than NPK soil or foliar applied, starting from 12 weeks after treatment application. The stem girth development under poultry manure at 50 and 60g per plant application had the best performance followed by poultry manure at 40g per plant. There were no significant differences in almost all the treatments at 5 weeks after sowing on seedlings stem girth. NPK has the longest tap root length while poultry manure had the largest average number of lateral roots followed by organo-mineral. The results thereby indicated that the use of poultry manure at 40 to 50g per plant and organomineral fertilizer as sources of nutrients had significant effects on cacao seedling quality.

Ograniczanie wyników

2 Acta Scientiarum Polonorum. Hortorum Cultus

1 Acta Agrobotanica

1 Acta Agrophysica

1 International Letters of Natural Sciences

1 Zeszyty Problemowe Postępów Nauk Rolniczych

1 Abou Obaid Y. A.

1 Cieciora M.

1 Czuchaj P.

1 Dimova Vassilevska-Ivanova R.

1 Famuwagun I. B.

1 Haddad R. H.

1 Ivanova Petrova M.

1 Karam F. S.

1 Kitir N.

1 Krasimirova Again-Stoyanova N.

1 Oladitan T. O.

1 Ozdemir G.

1 Ozlu E.

1 Shaban N. T.

1 Skrastina L.

1 Szczepaniak S.

1 Traykov Zehirov G.

1 Turan M.

1 Vucans R.

1 2022

1 2018

1 2017

1 2016