Reduction of Nutrient Run-Off by the Use of Coated Slow-Release Fertilizers on Two Container-Grown Nursery Crops

Diara, C.; Incrocci, Luca; Incrocci, Giorgio; Carmassi, Giulia; Pardossi, Alberto; Cozzi, Pier Giorgio; Fibbi, F.; Marzialetti, P.; Clemens, Ronald

doi:10.17660/actahortic.2014.1034.9

Cited by 4 publications

(3 citation statements)

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“…In containerized crop production, fertilizing with controlled-release fertilizer (CRF) instead of aqueous or soluble granular forms is among the most widely employed BMPs for fertilizer management by growers in Virginia (Mack et al, 2017) and Alabama (Fain et al, 2000). Relative to other fertilization methods used in nursery crop production, CRFs have been shown to promote higher phosphorus use efficiency (PUE; percent of fertilizer P taken up by plants; Naik et al, 2017) and decrease P leaching from containers (Broschat, 1995;Diara et al, 2014) and subsequent P runoff from a given production area (Sharma and Bolques, 2007).…”

Section: Introductionmentioning

confidence: 99%

Growth response of Hydrangea macrophylla and Ilex crenata cultivars to low-phosphorus controlled-release fertilizers

Shreckhise

Owen

Niemiera

2019

Scientia Horticulturae

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In containerized nursery-crop production, conventional phosphorus (P) fertilization amounts are reported to be in excess of plant needs which has resulted in poor P use efficiency (PUE) and subsequent P leaching from containers. Phosphorus leaching can be reduced and PUE improved without affecting plant growth by reducing P fertilization. The objective of this study was to identify the lowest controlled-release fertilizer (CRF)-P content and subsequent pour-through-extracted substrate pore-water P (PWP) concentration that produces maximal shoot growth of two common container-grown nursery crop species, Hydrangea macrophylla 'PIIHM-II' (hydrangea) and Ilex crenata 'Helleri' (holly), in a pine bark substrate. Hydrangea and holly liners were potted into 3.8-L containers containing a pine bark substrate and grown simultaneously in two different Virginia ecoregions, Middle Atlantic Coastal Plain (MACP) and Ridge and Valley (RV). Plants were fertilized with one of five CRF formulations, each containing equal nitrogen (N) and potassium (K) and 0.4%, 0.9%, 1.3%, 1.7% or 2.6% (control) P to supply containers with 0.1, 0.2, 0.3, 0.4 or 0.6 g P, respectively. In both ecoregions, hydrangea shoot dry weight (SDW) and growth index [i.e., (widest width + perpendicular width + height) ÷ 3, GI] values were maximal in plants fertilized with 0.3 to 0.4 g P or the control. The lowest CRF-P rate needed for maximal SDW and GI of holly was 0.2 g P at the RV site and 0.4 g P at the MACP site. Mean PWP concentrations that corresponded with highest SDW were as low as 0.8 and 1.2 mg L −1 for hydrangea and holly, respectively. Results from this research suggest hydrangea requires approximately half the P rate supplied by recommended rates of conventional CRFs. Since the growth response of holly to CRF-P rate at the MACP site was inconsistent with results observed at the RV site and findings in scientific literature, further research is needed to determine the minimum required CRF-P rate for this taxon.

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Section: Introductionmentioning

confidence: 99%

Growth response of Hydrangea macrophylla and Ilex crenata cultivars to low-phosphorus controlled-release fertilizers

Shreckhise

Owen

Niemiera

2019

Scientia Horticulturae

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“…Pine bark-based substrates have little ability to sorb fertilizer P, thus enabling P to readily leach from containers during irrigation (Marconi and Nelson, 1984;Paradelo et al, 2017;Yeager and Wright, 1982). The best management practice (Bilderback et al, 2013a) of using polymer-or resin-coated controlled-release fertilizers (CRFs) is, in part, used to reduce P leaching and runoff relative to the use of soluble fertilizers (Broschat, 1995;Diara et al, 2014). According to survey studies, CRFs have been widely adopted by the nursery industry in the United States (Dennis et al, 2010;Fain et al, 2000;Mack et al, 2017).…”

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Dolomite and Micronutrient Fertilizer Affect Phosphorus Fate When Growing Crape Myrtle in Pine Bark

Shreckhise¹,

Owen²,

Eick³

et al. 2020

horts

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Soilless substrates are routinely amended with dolomite and sulfate-based micronutrients to improve fertility, but the effect of these amendments on phosphorous (P) in substrate pore-water during containerized crop production is poorly understood. The objectives of this research were as follows: compare the effects of dolomite and sulfate-based micronutrient amendments on total P (TP), total dissolved P (TDP), orthophosphate P (OP), and particulate P (PP; TP − TDP) concentrations in pour-through extracts; to model saturated solid phases in substrate pore-water using Visual MINTEQ; and to assess the effects of dolomite and micronutrient amendments on growth and subsequent P uptake efficiency (PUE) of Lagerstroemia L. ‘Natchez’ (crape myrtle) potted in pine bark. Containerized crape myrtle were grown in a greenhouse for 93 days in a 100% pine bark substrate containing a polymer-coated 19N–2.6P–10.8K controlled-release fertilizer (CRF) and one of four substrate amendment treatments: no dolomite or micronutrients (control), 2.97 kg·m−3 dolomite (FL); 0.89 kg·m−3 micronutrients (FM); or both dolomite and micronutrients (FLM). Pour-through extracts were collected approximately weekly and fractioned to measure pore-water TP, TDP, and OP and to calculate PP. Particulate P concentrations in pour-through extracts were generally unaffected by amendments. Relative to the control, amending pine bark with FLM reduced water-extractable OP, TDP, and TP concentrations by ≈56%, had no effect on P uptake efficiency, and resulted in 34% higher total dry weight (TDW) of crape myrtle. The FM substrate had effects similar to those of FLM on plant TDW and PUE, and FM reduced pore-water OP, TDP, and TP concentrations by 32% to 36% compared with the control. Crape myrtle grown in FL had 28% lower TDW but pour-through OP, TDP, and TP concentrations were similar to those of the control. Chemical conditions in FLM were favorable for precipitation of manganese hydrogen phosphate (MnHPO4), which may have contributed to lower water-extractable P concentrations in this treatment. This research suggests that amending pine bark substrate with dolomite and a sulfate-based micronutrient fertilizer should be considered a best management practice for nursery crop production.

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“…Phosphorus leaching from containers is exacerbated since container-grown crops are typically irrigated daily while the plants are actively growing. The use of polymer-or resin-coated controlled-release fertilizers (CRFs), a best management practice (Bilderback et al, 2013a) that reduces P leaching relative to soluble fertilizers (Broschat, 1995;Diara et al, 2014), has been widely adopted by the US nursery industry according to survey studies (Dennis et al, 2010;Fain et al, 2000;Mack et al, 2017). However, P uptake efficiency (percent of fertilizer-P absorbed by plants) of container-grown nursery crops remains between 7 and 62% when using CRFs (McGinnis et al, 2009;Owen et al, 2008;Tyler et al, 1996;Warren et al, 1995Warren et al, , 2001.…”

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confidence: 99%

Dolomite and Micronutrient Fertilizer Affect Phosphorus Fate in Pine Bark Substrate used for Containerized Nursery Crop Production

Shreckhise

Owen

Eick

et al. 2019

Soil Science Soc of Amer J

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Dolomite and a micronutrient fertilizer are routinely incorporated into a pine bark-based soilless substrate when producing containerized nursery crops, yet the effect of these amendments on phosphorus (P) is not well understood. The objective of this research was to determine the effect of dolomite and micronutrient fertilizer amendments on P partitioning among four P fractions (i.e., orthophosphate-P [OP], non-orthophosphate dissolved P [nODP], total dissolved P [TDP], and particulate P [PP]) and to model potential P species in leachate of pine bark substrate. Amendment treatments incorporated into bark at experiment initiation included (1) a control (no fertilizer, dolomite, or micronutrient fertilizer), (2) controlled-release fertilizer (CrF), (3) CrF and dolomite, (4) CrF and micronutrient fertilizer, or (5) CrF, dolomite, and micronutrient fertilizer. Phosphorus fractions in leachate of irrigated pine bark columns were determined at eight sampling times over 48 days. Amending pine bark with dolomite and micronutrient fertilizer reduced leachate OP concentrations by 70% when averaged across sampling dates primarily due to retention of OP in the substrate by dolomite. The nODP fraction was unaffected by amendments, and the response of TDP was similar to that of OP. Particulate P was present throughout the study and was strongly correlated particulate Fe and DOC concentrations. Visual MInTEq indicated MnHPO 4 and Ca 5 (PO 4) 3 (OH) were consistently saturated with respect to their solid phase in treatments containing CrF. results of this study suggest amending pine bark with dolomite and micronutrients is a best management practice for reducing P leaching from containerized nurseries.

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Reduction of Nutrient Run-Off by the Use of Coated Slow-Release Fertilizers on Two Container-Grown Nursery Crops

Cited by 4 publications

References 0 publications

Growth response of Hydrangea macrophylla and Ilex crenata cultivars to low-phosphorus controlled-release fertilizers

Growth response of Hydrangea macrophylla and Ilex crenata cultivars to low-phosphorus controlled-release fertilizers

Dolomite and Micronutrient Fertilizer Affect Phosphorus Fate When Growing Crape Myrtle in Pine Bark

Dolomite and Micronutrient Fertilizer Affect Phosphorus Fate in Pine Bark Substrate used for Containerized Nursery Crop Production

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