Influence of fertilization application and growing substrate on container-grown woody ornamentals

Five fertilization systems and seven types of growing substrates were tested with two woody plant species with different nutritional demands (Thuja occidentalis, Pyracantha coccinea) grown in two-litre containers. The experiment was repeated in two vegetative seasons. Application of controlled release fertilizer (CRF) was proved the most reliable; it gave good or at least average results in dependence on used growing substrates. Significant differences between application of CRF and other fertilization systems were with Pyracantha plants. System using slow release fertilizer with additional nitrogen fertilizing also showed good results. Systems based only on liquid feeding were less reliable, with some substrates they showed very good results; with others (peat substrate, peat bark substrates with wood components) they were bad. Similar results were achieved with top dressing of granulated fertilizer. Evaluating the substrates good results were obtained by using mixtures of peat with components with higher content of nutrients – peat bark substrates, peat bark substrates with compost and non-peat mixtures of composted bark, wood fibres and compost. Significant differences between these types of substrates and peat one or peat bark substrate with wood components were both with Thuja plants and especially with Pyracantha plants, which have higher demand for nutrients. The experiments showed that peat based substrates amended with alternative components or non-peat substrates can bring better results than the peat ones.

Download Full-text

Effect of slow release fertilizers on container-grown woody plants

Horticultural Science ◽

10.17221/1844-hortsci ◽

2008 ◽

Vol 34 (No. 1) ◽

pp. 35-41 ◽

Cited By ~ 2

Author(s):

F. Šrámek ◽

M. Dubský

Keyword(s):

Nitrogen Fertilizer ◽

Woody Plants ◽

Slow Release ◽

First Year ◽

Nutrient Source ◽

Thuja Occidentalis ◽

Slow Release Fertilizers ◽

Second Year ◽

Soluble Fertilizer ◽

Pyracantha Coccinea

Slow-Release Fertilizers (SRF) Silvamix Forte and Silvagen were tested in two-year experiments with container-grown woody plants (<i>Pyracantha coccinea</i>, <i>Thuja occidentalis</i>). Several fertilizing systems were compared: preplant application of SRF into substrate as the sole nutrient source for a two-year period, preplant application of SRF and soluble fertilizer (PG Mix), and preplant application of SRF and soluble fertilizer together with additional fertilizing by solution of nitrogen fertilizer during both growing periods. A system with controlled-release fertilizer (CRF) Osmocote 5−6 was chosen as a control variant; it was incorporated into substrate before planting in the first year and top-dressed in the second year. CRF Plantacote 6M (mixed into substrate before planting and top-dressed in the second year) and Osmocote 16−18 applied only before planting were tested, too. The experiments showed that SRF Silvamix Forte and Silvagen give results comparable with CFR provided that they were incorporated together with soluble ferti-lizer dose and plants were fertilized by solution of nitrogen fertilizer during both growing periods.

Download Full-text

The Effect of Varying Speed Release of Nutrients from Fertilizers on Growth-production Process of Turf

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis ◽

10.11118/actaun201664020441 ◽

2016 ◽

Vol 64 (2) ◽

pp. 441-447

Author(s):

Peter Hric ◽

Ján Jančovič ◽

Peter Kovár ◽

Ľuboš Vozár

Keyword(s):

Controlled Release ◽

Potassium Salt ◽

Slow Release ◽

Slovak Republic ◽

Control Treatment ◽

Daily Production ◽

Slow Release Fertilizer ◽

Dry Conditions ◽

Growth Production ◽

The Individual

The aim of this experiment was to compare the influence of fertilizers with different speed of nutrients release on growth–production indicators of turf under non–irrigated conditions. The experiment was carried in warm and dry conditions in area Nitra (Slovak Republic). In the experiment were followed 5 treatments (1. without fertilization, 2. Nitre with dolomite, Superphosphate, Potassium salt, 3. Turf fertilizer Travcerit®, 4. Slow release fertilizer SRF NPK 14–5–14 (+ 4CaO + 4MgO + 7S), 5. Controlled release fertilizer Duslocote® NPK (S) 13–9–18 (+6S)). The highest gain of height reached variant fertilized by fertilizer SRF NPK 14–5–14 (+ 4CaO + 4MgO + 7S). Comparison of the individual treatments for the whole period showed significantly lower average daily gains of height on control treatment compared to fertilizing treatments Nitre with dolomite, Superphosphate, Potassium salt, SRF NPK 14–5–14 (+ 4CaO + 4MgO + 7S) and Duslocote® NPK (S) 13–9–18 (+6S). During the reported period the highest gain of weight reached treatment by application fertilizer Duslocote® NPK (S) 13– 9–18 (+ 6S). Comparison of the individual treatments for the whole period, were found significantly lower average daily production of phytomass on control treatment in comparison with fertilization turfs by Travcerit® and Duslocote® NPK (S) 13–9–18 (+6S).

Download Full-text

Sulfur-Modified Coated Slow-Release Fertilizer Based on Castor Oil: Synthesis and a Controlled-Release Model

ACS Sustainable Chemistry & Engineering ◽

10.1021/acssuschemeng.0c06056 ◽

2020 ◽

Vol 8 (49) ◽

pp. 18044-18053

Author(s):

Xiaohan Zhao ◽

Xin Qi ◽

Qianlin Chen ◽

Xianquan Ao ◽

Yu Guo

Keyword(s):

Controlled Release ◽

Castor Oil ◽

Slow Release ◽

Slow Release Fertilizer ◽

Oil Synthesis ◽

Release Model

Download Full-text

Effect of Temperature on the Behavior of Slow Release Fertilizer from ENR-50/RH/Urea Composites

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1021.308 ◽

2021 ◽

Vol 1021 ◽

pp. 308-316

Author(s):

Marwa N Al-Samarrai ◽

Rosniza Hamzah

Keyword(s):

Controlled Release ◽

Slow Release ◽

Coating Material ◽

Effect Of Temperature ◽

The Third ◽

Slow Release Fertilizer ◽

Urea Release ◽

Uv Visible ◽

Release Method ◽

Fast Release

Generally, chemical fertilizer is considered as a one of the most significant materials for increasing food production. However, the fast release of the conventional fertilizer could effect negatively on the plants. Thus, the idea of using controlled release method in the agriculture application has emerged recently due to the efficiency of fertilizers can be improved by the controlled-release method. The objective of this work is to synthesize a new Slow Release Fertilizer from three different materials; the first one is urea, which is the conventional fertilizer, the second one is the rice husk (RH), which represents the carrier material, and the third one is epoxidized natural rubber (ENR-50), which represents the coating material. This work was divided into three series. The first series is the production of RH/Urea beads. RH was treated with alkaline NaOH at 1wt.% according to the weight of RH. The treated RH was then mixed with urea that produced treated RH/urea beads. In the second series, 200 mg of ENR-50 was applied to produce thicknes of coating material for treated RH/urea beads. In the third series, treated RH/urea beads coated with 200 mg of ENR-50 were subjected to the released behavior at different temperature in the water. After that, the prepared samples were characterized using Scanning Electron Microscopy (SEM) and UV-visible spectroscopy. Results suggested that the increasing of temperature has increased the rate of urea release of SRF samples in the water. Furthermore, the SRF sample at 35, 45, and 55 °C showed shorter time of release at 40, 34, and 17 day as compared to 47 day of SRF at room temperature.

Download Full-text

Vegetative Propagation of Woody Ornamentals Through Forcing of Epicormic Shoots

HortScience ◽

10.21273/hortsci.33.3.503c ◽

1998 ◽

Vol 33 (3) ◽

pp. 503c-503

Author(s):

Paul H. Henry ◽

John E. Preece

Keyword(s):

Plant Material ◽

Woody Plant ◽

Clonal Plant ◽

Light Regime ◽

Moisture Regime ◽

Stem Cuttings ◽

Shrub Species ◽

Woody Ornamentals ◽

Ornamental Tree ◽

Environmental Light

A propagation method is being developed that allows softwood shoots to be generated from stem sections of dormant woody plant species. These shoots, forced in the greenhouse during the winter, are subsequently collected and processed as softwood stem cuttings to produce clonal plant material. Many species in the nursery industry can only be propagated using softwood cuttings, and this technique allows propagation of these species to be initiated several months earlier than what is typically possible. Current studies involve expanded screening of ornamental tree and shrub species to determine if commercial production using this technique is feasible. Results demonstrate that many species may be propagated using this method, but that some species are more prolific than others with respect to number of softwood shoots produced. Additional studies are currently in progress to determine the environmental (light regime, moisture regime) and cultural (type of media) conditions that are optimal when producing clonal plant material via this technique.

Download Full-text