scholarly journals (59) An Examination of Irrigation Volumes and Controlled-release Fertilizer Application Methods and Rates to Reduce Nursery Container Leachate and Fertilizer Use

HortScience ◽  
2005 ◽  
Vol 40 (4) ◽  
pp. 997B-997
Author(s):  
Peter Purvis ◽  
Calvin Chong ◽  
Glen Lumis
Keyword(s):  
Electrical Conductivity ◽  
Controlled Release ◽  
Fertilizer Application ◽  
Peat Moss ◽  
Regression Curve ◽  
Controlled Release Fertilizer ◽  
Fertilizer Use ◽  
Sphagnum Peat Moss ◽  
Physocarpus Opulifolius ◽  
Application Methods

Plug-rooted liners of common ninebark [Physocarpus opulifolius (L.) Maxim.] were grown in 6-L nursery containers filled with 73% composted pine bark, 22% sphagnum peat moss, and 5% pea gravel (by volume). Plants were fertilized with Polyon (Nutryon) 17–5–12 (17N–2P–5K) 6-month controlled-release fertilizer at various rates (2.5, 4.5, 6.5, and 8.5 kg·m-3) pre-incorporated, topdressed, or dibbled (placed under the liner at potting). Plants were trickle-irrigated daily with low (0.4-L), middle (0.8-L), or high (2.0-L) volumes of water to maintain leaching fractions of <0.15, 0.25–0.35, or >0.60, respectively. Regression analysis indicated that growth of ninebark increased from 30 to 109 g/plant with increasing rates of incorporated fertilizer (mean over irrigation volumes), from 27 to 71 g/plant with topdress and from 59 to 103 g/plant with dibble. Electrical conductivity (EC, mean over five dates) of the leachate throughout the season was highest with dibble (0.85 dS·m-3), intermediate with incorporated (0.81 dS·m-3), and least with topdressed (0.76 dS·m-3). With low irrigation volumes, growth of ninebark increased from 42 to 81 g/plant with increasing rates of fertilizer (mean over methods), and from 39 to 105 g/plant with middle or high volumes (common regression curve). With low irrigation volumes, leachate EC increased from 0.74 to 0.94 dS·m-3 with increasing rates of fertilizer, and from 0.75 to 0.81 dS·m-3 with middle or high volumes.

scholarly journals 503 PB 219 RECYCLING SOLUTIONS AND METHOD OF FERTILIZATION INFLUENCE GROWTH OF HYBRID GERANIUM

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 503e-503
Author(s):  
Patricia R. Knight ◽  
D. Joseph Eakes ◽  
Charles H. Gilliam ◽  
Harry G. Ponder
Keyword(s):  
Controlled Release ◽  
Water Soluble ◽  
Plant Quality ◽  
Pine Bark ◽  
Peat Moss ◽  
Production Medium ◽  
Controlled Release Fertilizer ◽  
Soluble Fertilizer ◽  
Receiving Water

Seed geranium (Pelargonium × hortorum Bailey `Scarlet Elite') were grown in subirrigation troughs in 10-cm pots from 25 June to 3 August 1993. Production medium was a 1 pine bark:3 peat moss:1 perlite (v:v:v) mixture. Plants were irrigated using fresh or recycled solutions and fertilized using Peter's Geranium Special 15N-6.5P-12.5K or Osmocote 14N-6.1P-11.6K. Controlled release fertilizer produced greater shoot dry weights and foliar color ratings than plants receiving water soluble fertilizer. Plants receiving a controlled release fertilizer had lower shoot N concentrations than plants receiving water soluble fertilizer. Recycled irrigation solutions reduced plant quality regardless of method of fertilization.

scholarly journals The Potential of Thiosulfinates in as Bioinhibitor for Controlled Release Fertilizer Application

2013 ◽  
Vol 4 (1) ◽  
pp. 274-274
Author(s):  
Nur Kamila Ramli ◽  
Nurlidia Mansor ◽  
Sity Juaeiriah Samsudin ◽  
Zahid Majeed
Keyword(s):  
Controlled Release ◽  
Fertilizer Application ◽  
Controlled Release Fertilizer

scholarly journals GERANIUM PRODUCTION AS INFLUENCED BY THREE METHODS OF IRRIGATION USING A CONTROLLED RELEASE FERTILIZER

HortScience ◽  
1994 ◽  
Vol 29 (7) ◽  
pp. 730a-730
Author(s):  
Patricia R. Knight ◽  
D. Joseph Eakes ◽  
Charles H. Gilliam ◽  
Harry G. Ponder
Keyword(s):  
Controlled Release ◽  
Pine Bark ◽  
Peat Moss ◽  
Controlled Release Fertilizer

Seed geraniums (Pelargonium × hortorum Bailey `Scarlet Elite') were grown in 10-cm pots in a 1 pine bark : 3 peat moss : 1 perlite medium from 18 March until 5 May 1993. Plants received Osmocote 14N-6.1P-12.5K and either conventional overhead (CO), drip (DI), or subirrigation (SI). Subirrigation produced greater shoot and root dry weights than CO or DI. Plants grown using DI produced fewer branches than plants grown using CO or SI. Plants receiving SI reached anthesis before plants receiving CO or DI. Method of irrigation had no influence on total root, soil, or leachate N, but SI did increase total shoot N.

scholarly journals Effect of seed coat removal and controlled-release fertilizer application on plant emergence and vegetative growth of two citrus rootstocks

Fruits ◽  
2007 ◽  
Vol 62 (1) ◽  
pp. 13-19 ◽  
Author(s):  
Eduardo Augusto Girardi ◽  
Francisco de Assis Alves Mourão Filho ◽  
Ricardo Alfredo Kluge
Keyword(s):  
Controlled Release ◽  
Seed Coat ◽  
Vegetative Growth ◽  
Fertilizer Application ◽  
Controlled Release Fertilizer ◽  
Plant Emergence

scholarly journals Productivity of soybean crop after fertilization with normal and polymer-coated potassium sources

2019 ◽  
pp. 709-716
Author(s):  
Jéssica Caroline Coppo ◽  
Maria Do Carmo Lana ◽  
Jussara Carla Conti Friedrich ◽  
Alfredo José Alves Neto ◽  
Diego August Fatecha Foiz ◽  
...  
Keyword(s):  
Total Dose ◽  
Fertilizer Application ◽  
Economic Aspects ◽  
Phenological Stage ◽  
Fertilizer Use ◽  
Soybean Crop ◽  
Potassium Sources ◽  
Application Methods ◽  
Red Latosol

The adoption of different fertilizer application methods should consider the operational, agronomic and economic aspects. The objective of this work was to study the fertilization response with potassium in the soybean crop at different times of application and different potassium sources in an Eutroferric Red Latosol. The experiment was carried out in the municipality of Formosa do Oeste-PR. The design was in a randomized block in a factorial scheme (2 × 5) +1, with 2 potassium sources: normal KCl (KCl) and polymer-coated KCl (KCl-polymer), the KCl doses were adjusted to 40 kg ha -1 of K2O, the second factor refers to the splitting of K2O dose in five application times: T1, application of K2O was nine days before sowing, T2 application split up being ½ of the dose nine days before sowing + ½ of the dose of K2O at sowing, T3 application of the total dose of K2O at sowing, T4 ½ of the dose at sowing + ½ at the V3 phenological stage of the crop, T5 application of K2O was total at the V3 stage of the crop. And an additional witness, without K2O application. KCl-polymer was more efficient for application to the haul before sowing the crop. The fertilization with KCl was better when applied at the V3 stage of the crop. Fertilization with KCl-polymer resulted in higher K content in the leaf, higher efficiency of fertilizer use reflecting in higher productivity.

scholarly journals Alternative Substrates and Fertilization Doses in the Production of Pinus cembroides Zucc. in Nursery

Forests ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 71 ◽  
Author(s):  
Rosa Elvira Madrid-Aispuro ◽  
José Ángel Prieto-Ruíz ◽  
Arnulfo Aldrete ◽  
José Ciro Hernández-Díaz ◽  
Christian Wehenkel ◽  
...  
Keyword(s):  
Controlled Release ◽  
Growth Response ◽  
Block Design ◽  
Peat Moss ◽  
Controlled Release Fertilizer ◽  
Pine Sawdust ◽  
Containerized Seedlings ◽  
Randomized Complete Block Design ◽  
Morphological Variables ◽  
The Cost

Rooting substrate and fertilization are key components in the production of containerized seedlings, as they can influence the morphological and physiological characteristics of the plants, which in turn can impact outplanting performance. The objective of the study was to evaluate the effect of four substrates based on mixtures of peat moss (PM), composted bark (CB) and raw pine sawdust (PS), combined with two doses of controlled release fertilizer (CRF) and one non-fertilized control, on the growth of Pinus cembroides Zucc. in the nursery. The treatments were: M1: 50+25+25, M2: 25+25+50, M3: 25+50+25 and M4: 50+50+0 of PM+ CB+ PS (% by volume), respectively. Fertilizer treatments used a controlled release fertilizer (Multicote®): F1: 3 kg m−3 and F2: 6 kg m−3 and a control (WF: with no added fertilizer). The treatments were distributed in a randomized complete block design, with a factorial arrangement of 4 × 3 and six replications. The variables evaluated were: height, seedling diameter, dry biomass, Dickson Quality Index, N, P and K content. Regardless of the substrate, the high fertilizer dose (6 kg m−3) improved most morphological variables. In addition, the high fertilizer dose resulted in foliar N, P and K concentrations within recommended ranges for all substrates. The substrate containing only peat moss and composted bark (M4 + F1 and M4 + F2) had the best growth response. However, the substrate composed of 25% peat moss, 50% composted bark and 25% raw pine sawdust with the high fertilizer dose (M3 + F2) resulted in acceptable seedling growth, and may be preferred if the cost of the substrate is a concern to nursery manager.

Recirculation of nutrients in container nursery production

2000 ◽  
Vol 80 (1) ◽  
pp. 39-45 ◽  
Author(s):  
Peter Purvis ◽  
Calvin Chong ◽  
Glen P. Lumis
Keyword(s):  
Electrical Conductivity ◽  
Controlled Release ◽  
Plant Growth ◽  
Nutrient Status ◽  
Water Soluble ◽  
Woody Ornamentals ◽  
Ph Values ◽  
Nursery Production ◽  
Physocarpus Opulifolius ◽  
Container Nursery

This study evaluated (a) the capacity of a computerized injector to deliver and recirculate nutrients in a container nursery, and (b) plant growth and nutrient status under this regime compared with non-recirculated methods of fertilization, using Dart's Gold ninebark (Physocarpus opulifolius L. 'Dart's Gold') potted in 6-L containers filled with a medium of pine bark, peat, and soil (75, 15, and 10%, by volume). The injector was programmed to deliver NH4-N (24 mg L−1), NO3-N (196 mg L−1), P (54 mg L−1), and K (235 mg L−1) and other nutrients, with or without recirculation. Plants grown with recirculated nutrients were placed on aluminium troughs to collect the leachate, which was pumped back to the injector, recharged [based on a target electrical conductivity (EC) value of 1.85 dS m−1], and returned to the crop. Additional plants were grown on a crushed stone base and fertilized (a) by the computerized injector without recirculation, (b) with water soluble Plant-Prod 20-8-20 (200 mg L−1 N; non-recirculated) delivered through a Dosatron proportioner, or (c) with incorporated, controlled release Nutricote 18-6-8, Type 140 (6.5 kg m−3). NH4-N, NO3-N, P, and K concentrations delivered by the computerized injector (recirculated and non-recirculated; mean over six dates, 3 July to 28 August 1997) were 50, 22, 41, and 39%, respectively, lower than targeted values. Electrical conductivity values were not significantly different from targeted. The pH values (6.2 – 6.4) were higher than targeted (6.0). The amounts of N, P, and K used were reduced by between 57 and 77% with recirculation compared to without. Notwithstanding reduced N, P, and K values, plants grew best with recirculated nutrients and least with non-recirculated liquid 20-8-20. Key words: Fertigation, Harrow Fertigation Manager, recycling, woody ornamentals

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