scholarly journals Effect of different fertilization on the growth and nutrition of azalea (Rhododendron L.)

2012 ◽  
Vol 65 (4) ◽  
pp. 123-132 ◽  
Author(s):  
Zenia Michałojć ◽  
Michał Koter
Keyword(s):  
Slow Release ◽  
Nutrient Content ◽  
Magnesium Content ◽  
Shoot Length ◽  
First Year ◽  
Fertilizer Rate ◽  
Slow Release Fertilizer ◽  
Growth And Nutrition ◽  
Growing Medium ◽  
Second Year

A study on azalea (<em>Rhododendron </em>L.), 'Kilian' and 'Persil', was conducted in 2009–2010. Plants were grown in pots in the open air, in a peat substrate with a pH of 4.8. The effect of the following fertilization methods was studied: I – traditional fertilization (single fertilizers were applied in 2 rates); II – a slow-release fertilizer (Hortiform pH); III – combined fertilization (¼ of the rate of nutrients was applied in the form of single fertilizers and ¾ in the form of Hortiform pH). The slow-release fertilizer Hortiform pH and combined fertilization were applied once in each study year when filling the pots with growing medium. Fertilizers were applied at the basic rate (D1) and at a twice higher rate (D2). In the first year of cultivation, the study showed no significant effect of fertilization method on shoot length in both azalea cultivars, whereas in the second year the longest shoots were found after application of the slow-release fertilizer Hortiform pH. In both years of the study, significantly longer shoots were found in the cultivar 'Persil' after application of the lower fertilizer rate (D1) than after application of the higher fertilizer rate (D2). On the other hand, the study showed that the fertilizer rate had no effect on shoot length in 'Kilian'. After application of the higher fertilizer rate, a higher content of nitrogen and potassium as well as a lower content of phosphorus, calcium, and magnesium were determined in the leaves of both cultivars. The study found the following percentages to be the optimal nutrient content in azalea leaves: 1.88 – 2.20% N; 1.0 – 1.7% K; and 0.60% – 1.20% Ca, while the phosphorus content of 0.09 – 0.25% and the magnesium content of 0.14 – 0.25% were shown to be the lower limit for optimal plant nutrition. After the end of the growing season, a low content of all nutrients in the medium was found in both study years, irrespective of the applied fertilizer rate and fertilization method.

scholarly journals EVALUATION OF SLOW RELEASE FERTILIZER ON THE INITIAL DEVELOPMENT AND COFFEE PRODUCTION

2019 ◽  
Vol 14 (4) ◽  
pp. 538
Author(s):  
Kleso Silva Franco Junior ◽  
Julian Silva Carvalho ◽  
Bernardino Cangussu Guimarães ◽  
Camila Karen Reis Barbosa ◽  
Giselle Prado Brigante ◽  
...  
Keyword(s):  
Shoot Growth ◽  
Slow Release ◽  
Block Design ◽  
First Year ◽  
Coffee Production ◽  
Fresh Matter ◽  
Initial Development ◽  
Slow Release Fertilizer ◽  
Randomized Block Design ◽  
Second Year

The objective in this work was to evaluate the efficiency of slow release fertilizer in seedling production, initial development and first coffee production. The research was carried out at Sitio Santa Felicidade, Campestre - MG, Brazil, in a randomized block design with two treatments and ten replicates, totaling 20 experimental plots. Coffee seedlings were produced using Ciclus Substrate (20% N, 22% P2O5 and 5% K2O) and conventional fertilizers 4 kg simple super phosphate (18% P2O5) and 0.25 kg Potassium Chloride (58% K2O). The variables evaluated were size, dry and fresh matter of the shoot and root system, and the seedlings were transplanted to the field and those from Ciclus Substrate received in the first year Ciclus NS (30% N) and in the second year. NK (19-00-19) and conventionally produced with conventional fertilizers (20-00-20 and 25-00-25 respectively), the variables evaluated were: shoot growth, length and number of plagiotropic branch internodes Slow release fertilizer ciclus Substrate has been found to be a viable technology for the production of arabica coffee seedlings, coffee planting NS provides good plant development and coffee producing NK provides good plant growth and higher productivity.

Slow Release NPK Fertilizer Preparation from Natural Resources

2019 ◽  
Vol 948 ◽  
pp. 43-48 ◽  
Author(s):  
Windia Hanifah ◽  
Chandra Wahyu Purnomo ◽  
Suryo Purwono
Keyword(s):  
Slow Release ◽  
Nutrient Content ◽  
Release Profile ◽  
Chicken Manure ◽  
Equal Weight ◽  
Nutrient Sources ◽  
Slow Release Fertilizer ◽  
N Source ◽  
Npk Fertilizer ◽  
Release Method

Preparation of Natural multi-nutrient Slow Release Fertilizer (NSRF) aims to reduce the environmental burden from some waste and increase the efficiency of fertilizer in releasing nutrient content. In this study,slow-release fertilizer was prepared from all natural components from waste which aredried chicken manure (N source), struvite (P source), and palm empty fruit bunch ash (K source). The equal weight of the three main nutrient sources was used with the addition of starch powder as the binder by 10%, 15% and 20% of the total nutrient mixture. The mixture of all nutrient with binder was granulated using pan granulator. Dried NSRF granule was tested using sand bed release method to observe the release profile of the contained nutrient. Based on the results of a 30-day leaching study, it was found that increasing concentration of binder will reduce the release of the nutrient from NSRF granules.

scholarly journals Effect of slow release fertilizers on container-grown woody plants

2008 ◽  
Vol 34 (No. 1) ◽  
pp. 35-41 ◽  
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&minus;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&minus;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.

scholarly journals Biosolid Residues as Soilless Media for Growing Wildflower Sod

2001 ◽  
Vol 11 (2) ◽  
pp. 194-199
Author(s):  
Bruce R. Roberts ◽  
Henry F. Decker ◽  
Kenneth J. Bagstad ◽  
Kathleen A. Peterson
Keyword(s):  
Slow Release ◽  
Dry Weight ◽  
Echinacea Purpurea ◽  
Single Application ◽  
Slow Release Fertilizer ◽  
Coreopsis Tinctoria ◽  
Purple Coneflower ◽  
Shoot Ratio ◽  
Growing Medium ◽  
Cosmos Bipinnatus

Two biosolid-containing waste media [sewage sludge compost and incinerated biosolids (flume sand)] were tested individually, together, and in combination with a commercial growing medium for growing wildflower sod in greenhouse trials over a 3-year period. A medium composed of flume sand and Metromix (7:3 weight/weight) in 7.5 {XtimesX} 10.5 {XtimesX} 2-inch deep (19 {XtimesX} 27 {XtimesX} 5-cm) plastic trays seeded at 20 oz/1000ft2 (6.1 g·m-2) with cosmos (Cosmos bipinnatus), cornflower (Centaurea cyannis), plains coreopsis (Coreopsis tinctoria), white yarrow (Achillea millefolium) and purple coneflower (Echinacea purpurea) produced a suitable wildflower sod in 10 to 12 weeks. A single application of slow release fertilizer (Osmocote 14-14-14, 14N-4.2P-11.6K) applied as a top dressing had no significant effect on sod development; however, a 4-mil [0.004-inch (0.10-mm)] polyethylene barrier placed in the base of each container resulted in increased dry weight accumulation and a higher root to shoot ratio relative to sod grown without plastic.

scholarly journals Comparison of phosphate fertilisers in a grazed hill country pasture

1990 ◽  
pp. 97-100 ◽  
Author(s):  
A.D. Mackay
Keyword(s):  
Phosphate Rock ◽  
Slow Release ◽  
First Year ◽  
Pasture Production ◽  
Hill Country ◽  
Grazed Pasture ◽  
Reactive Phosphate Rock ◽  
Small Plot ◽  
Second Year

A grazing trial evaluated the agronomic effectiveness of 3 different types of phosphate (P) fertilisers. The same fertilisers were also evaluated in a small-plot mowing trial located within the grazing trial. In the grazing trial, which covered 35 ha of summer moist hill country, the partially acidulated phosphate rock (PAPR) and reactive phosphate rock (RPR) were as effective as superphosphate in stimulating legume and pasture production in the first year. In the second year the two slow-release materials continued to perform as well as SSP. In contrast in the mowing trial, superphosphate was more effective than RPR in the first year. This trial technique clearly underestimates the initial effectiveness of PAPR and RPR in grazed hill country. The traditional small-plot mowing trial technique, and the role of PAPR and RPR fertilisers in hill country, both need re-evaluation. Keywords hill country, superphosphate, slow release fertilisers, mowing trials, grazed pasture

scholarly journals Chicken manure as soil amendment: Effect on yield and foliar nutrient content of tanier, and on chemical properties of the soil.

1969 ◽  
Vol 95 (3-4) ◽  
pp. 211-221
Author(s):  
Agenol González-Vélez
Keyword(s):  
Organic Matter ◽  
Chemical Properties ◽  
Nutrient Content ◽  
Low Fertility ◽  
Chicken Manure ◽  
First Year ◽  
Manure Application ◽  
Foliar Nutrient ◽  
Second Year ◽  
Effect On Yield

During two consecutive years, chicken manure effects on yield and foliar nutrient content of tanier, and on chemical properties of the soil were evaluated. Treatments were 0, 25 and 50 t/ha of chicken manure incorporated into the soil prior to planting the first year. No significant differences in yield were found among the chicken manure treatments. This lack of differences was attributed to the high coefficient of variation found in the experiment. Nevertheless, with the application of 25 t/ha we observed a 17% and 122% increase in yield on the first and second year of the experiment, respectively, compared to yield in the check treatment. This increase in yield could be related to the ample benefit of applied organic matter, especially in low fertility soil. Only foliar nitrogen content showed a significant increase with the chicken manure application in both years, whereas potassium content increased with manure application during the second year. The application of chicken manure caused an increase of organic matter, electric conductivity and N, P, K and Mg content in the soil during the first year.

scholarly journals Selecting the Optimum Slow-release Fertilizer Rate for Five Cultivars of Tissue-cultured Hosta

1998 ◽  
Vol 8 (2) ◽  
pp. 203-206 ◽  
Author(s):  
Wendy Britton ◽  
E.J. Holcomb ◽  
David J. Beattie
Keyword(s):  
Slow Release ◽  
Optimum Growth ◽  
Fertilizer Rate ◽  
Nutrient Analysis ◽  
Slow Release Fertilizer ◽  
Foliar Nutrient ◽  
Slow Release Fertilizers

Four rates of two slow-release fertilizers were tested for optimum growth of five hosta cultivars: Hosta sieboldiana `Elegans', Hosta plantaginea `Aphrodite', Hosta `Jade Scepter', Hosta `Hadspen Blue', and Hosta `Francee'. Tissue-cultured hostas from 2.5-cm plugs were planted in 6-inch (15-cm) pots filled with a commercial soilless medium, and the slow-release fertilizer was dibbled into the medium at 0, 3, 6, or 12 g/pot. The plants were maintained for 4 months. Root and shoot fresh and dry weights were recorded at the end of the experiment. In addition, foliar nutrient analysis was conducted on `Aphrodite', `Francee', and `Jade Sceptor'. Overall, hostas grew best when the medium was amended with 3 g of either Osmocote 14N-6P-11.5K or Sierrablen 17N-6P-12K slow-release fertilizer.

scholarly journals Fertilizer Levels and Medium Affect Foliage Plant Growth in an Ebb and Flow Irrigation System

1992 ◽  
Vol 10 (2) ◽  
pp. 81-86 ◽  
Author(s):  
R.T. Poole ◽  
C.A. Conover
Keyword(s):  
Slow Release ◽  
Irrigation System ◽  
Fertilizer Rate ◽  
Slow Release Fertilizer ◽  
Foliage Plant ◽  
Height Increase ◽  
Soluble Fertilizer ◽  
Fertilizer Rates ◽  
Lower Plant ◽  
Ebb And Flow

Abstract Three species of foliage plants were produced with three media, in an ebb and flow irrigation system (experiments 1 and 3) or with overhead manual irrigation (experiments 2 and 4). Expt. 1 used a constant feed program of 24N-3.5P-13K (24-8-16) soluble fertilizer added to the water supply at rates of 0.21, 0.42, 0.63 or 0.84 g/L. In experiments 2, 3 and 4, plants were fertilized with a constant feed program using the soluble fertilizer at 0.63 g/L or with a 19N-2.6P-10K (19-6-12) slow release fertilizer at rates of 2.5, 5.0 or 7.5 g/15 cm (6 in) pot. Plants produced in a Canadian sphagnum peat:pine bark mix were shorter and received lower plant grades compared to Fafard #4 and Vergro Container Mix. Height increase and plant grade for all plants was greater when fertilizer rate was increased from 0.21 to 0.42 g/L (0.79 to 1.58 g/gal), but height increase and plant grade did not improve much as fertilizer rates rose beyond 0.42 g/L (1.58 g/gal). In expt. 3, increase in height and plant grade for plants treated with 0.63 g/L (2.36 g/gal) soluble fertilizer was similar to height increase and plant grade for plants receiving the 5.0 and 7.5 g/15 cm pot slow release fertilizer.

scholarly journals 103 Optimizing the Propagation of the Ornamental Grass Hakonechloa macra `Aureola'

HortScience ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 459B-459
Author(s):  
Michael P. Harvey ◽  
Mark H. Brand
Keyword(s):  
Leaf Area ◽  
Slow Release ◽  
Early Spring ◽  
Shoot Length ◽  
Average Height ◽  
Temperature Optimum ◽  
Slow Release Fertilizer ◽  
Shoot Number ◽  
Healthy Growth ◽  
Marketable Size

Studies initiated in Spring 1998 analyzed the influence of division size, shade, and temperature on the growth rate of the ornamental grass Hakonechloa macra `Aureola' in nursery-container production. To determine the optimum division size for production, container-grown stock plants were used to make early spring divisions of four sizes (1-2, 4-6, 8-10, and 12-15 buds). Divisions were established in 325-ml pots for 1 month before being transplanted to 3.7-L nursery containers. Plants were grown outdoors and received topdressed 17-6-10 slow-release fertilizer (containing micronutrients) and drip irrigation from June through September. Average leaf area, shoot number and bud count increased linearly as division size increased, but average height remained the same between each treatment. Plants of all division sizes exhibited healthy growth, with 50% of the plants in the 4-6 buds/division treatment growing to marketable size compared to 45%, 35% and 15% in the 8-10, 12-15, and 1-2 buds/division treatments, respectively. Four shade densities (0%, 30%, 50%, and 70%) were tested to determine which promoted optimum growth. As shading increased, average shoot number per plant decreased, average height and shoot length increased and bud count remained the same. To determine the optimum growing temperature for Hakonechloa, divisions were grown in 325-ml pots under four different day/night temperatures (15/10, 21/16, 27/22, and 33/28 °C) for 12 weeks in growth chambers. Plants were fertigated daily with a 5-25-5 liquid fertilizer. Average bud count, leaf area, plant height, plant width, shoot length, and shoot number increased as temperature increased to 27/22 °C, then decreased significantly beyond this temperature optimum.

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