Longevities and nitrogen, phosphorus, and potassium release patterns of polymer‐coated controlled‐release fertilizers at 30°C and 40°C

Huett, DO; Gogel, Beverley J.

doi:10.1080/00103620009370490

Cited by 66 publications

(70 citation statements)

References 19 publications

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“…However, by this G-CRF, both temperature and soil moisture were main factors to affect nutrient release rate which would affect dispersion of fertilizer granules, effective cross section area of ion diffusion, and other physical/chemical processes in soil. In fact, by the CRFs in which a physical barrier controls the release easily affected by both soil moisture and temperature, such results have been tested in some studies and indicated that the nutrient releases rates of CRFs increased with improvement of the soil moisture and temperature [29][30][31][32]. In this experiment, the G-CRF showed obviously delaying release effects when soil moisture and temperature were below 45% (w/w) and 35 ∘ C, respectively.…”

Section: Discussionmentioning

confidence: 99%

Nutrients Release from a Novel Gel-Based Slow/Controlled Release Fertilizer

Ding

Zhang

et al. 2016

Applied and Environmental Soil Science

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A novel gel-based slow/controlled release fertilizer (G-CRF) was developed, which was produced by combining various natural, seminatural, and/or synthetic organic macromolecule materials and natural inorganic mineral with conventional NPK fertilizers. Its nutrient release characteristics were studied to compare with conventional fertilizers through the soil column leaching method. The influences of soil factors, including temperature, pH, water, and nutrient contents in the G-CRF on nutrient release, were also investigated through soil-water incubation method. These results indicated that the G-CRF had better effect on controlling release of N, P, and K nutrients, and the effect was more efficient when soil-water content was lower than 45% (w/w), temperature was below 35 ∘ C, and soil pH was in the range from weak acid to neutral. In addition, considering the effect of controlling nutrient release and cost of the materials in the G-CRF, it is recommended that the most feasible NPK nutrient contents in the G-CRF ranged from 30 to 35%.

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Section: Discussionmentioning

confidence: 99%

Nutrients Release from a Novel Gel-Based Slow/Controlled Release Fertilizer

Ding

Zhang

et al. 2016

Applied and Environmental Soil Science

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“…Since the diffusion of water into the membrane and the nutrient release is temperature dependent, as temperature increases, nutrient release of the controlled-release fertilisers also increases too (Huett and Gogel 2000;Haase et al 2007;Du et al 2008). The prolonged release period beyond the labelled rates usually found has been attributed to the fact that the release pattern of the polymer-coated fertilisers is determined in a water-leach test at constant temperature, typically 21-25°C (Haase et al 2007), conditions that are quite different to that found in the field.…”

Section: Agronomic Performances Of Fertilisersmentioning

confidence: 99%

Nitrogen-use efficiency and economic efficiency of slow-release N fertilisers applied to irrigated turfs in a Mediterranean environment

Arrobas

Parada

Magalhães³

et al. 2010

Nutr Cycl Agroecosyst

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The effect of three fertilisers that delay the bioavailability of nitrogen (N) in the soil was compared with ammonium nitrate and a zero N control in two irrigated turfs in NE Portugal. The fertilisers used were: Floranid permanent 16-7-15 (slow-release, IBDU/Isodur fertiliser); Basacote plus 9M 16-8-12 (controlled-release fertiliser, copolymer ethylene acrylic); Nitroteck 20-8-10 (stabilized fertiliser, dicyandiamide as nitrification inhibitor ? coating with polyterpene) and Nitrolusal (ammonium nitrate, 20.5% N), applied all at a rate of 120 kg N ha -1 . Nitrolusal was split into two fractions of 60 kg N ha -1 . Phosphorus (P) and potassium (K) rates were balanced among treatments by using superphosphate (18% P 2 O 5 ) and potassium chloride (60% K 2 O). The turf dry matter (DM) yield and N concentration in dry material were determined from several cuts of biomass throughout the growing season. Based on DM yield, N concentration in dry material and fertilisation costs, indices of N use efficiency and economic efficiency were estimated. Soil nitrate levels were monitored by using anion exchange membranes inserted directly into the soil. Basacote gave significantly lower DM yields than the other fertilised treatments. The apparent N recovery of Basacote was also the lowest. The results showed that Basacote released less N than that required for an adequate plant growth in the beginning of the growing season, hampered the flush of spring growth. Furthermore, the release period of this Basacote formulation, in the environmental conditions of these experiments, seemed to be longer than the length of the growing season. Nitroteck and Floranid yielded similar or even higher DM and apparent N recovery values than did Nitrolusal. The indices of economic efficiency ordered the fertilisers as Nitroteck [ Nitrolusal [ Floranid [ Basacote or Nitrolusal [ Nitroteck [ Floranid [ Basacote, if the costs of P and K fertilisers used to balance the P and K rates in the experimental design were, respectively, taken or not taken into account.

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“…With intense rain, the nutrients accumulated in the substrate are washed into the environment (Million et al, 2010). Most studies on the use of CRF have been carried out under laboratory conditions and/or without interaction with plants, or in greenhouses, where there is no interference from precipitation (Hershey & Paul, 1982;Niemiera & Leda, 1993;Cabrera, 1997;Huett & Gogel, 2000;Oliet et al, 2004;Merhaut et al, 2006). The variety of results in the literature on the composition Effects of climate and fertilization strategy on nitrogen balance in a potted crop…”

Section: Introductionmentioning

confidence: 99%

Effects of climate and fertilization strategy on nitrogen balance in an outdoor potted crop of Viburnum tinus L.

Narváez

Cáceres

Marfà

2012

Span. j. agric. res.

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Little information is currently available on how fertilization management affects leachate composition and the plant nitrogen (N) uptake of crops under Mediterranean climate. The objectives of this study were to determine the effect of different fertilization strategies and doses on the composition of the leachates and the use of N by plants, to establish a N balance for the different fertilization strategies and doses used and to establish a linear regression model to predict N concentration in leachates from an outdoor potted crop of Viburnum tinus L. 'Eve Price'. Two fertilizations strategies, i.e. continuous fertigation (NS) and incorporated controlled-release fertilizer (CRF), were applied to the crop. The treatments were two NS doses (NSA: 57.4 mg NO 3 --N L -1 and NSB: 43.4 mg NO 3 --N L -1 ) and two CRF doses (CRFC: 5 g L -1 and CRFD: 7 g L -1 ). The NO 3 --N concentration in the leachates from the CRF treatments was high in the first weeks of growing (100-300 mg L -1 ). The efficiency of use of N was greater in the NSA treatment (9.2 g g -1 ). When CRFC was applied there was an increased loss of N by leaching (48 % of the total N). The concentration of N in the leachates for both fertilization strategies was found to be correlated with the variables substrate temperature and precipitation. Therefore, these variables must be considered when determining the dose of fertilizer to be added to a crop, especially when CRF are chosen, to avoid high losses of N by leaching.Additional key words: controlled-release fertilizer; fertigation; Mediterranean climate; nitrate pollution; nitrogen efficiency; woody ornamental. ResumenEfectos del clima y de la estrategia de fertilización en el balance de nitrógeno en un cultivo al exterior en contenedor de Viburnum tinus L.Existe poca información sobre el efecto de la estrategia de fertilización en la composición de los lixiviados y la absorción de nitrógeno (N) por un cultivo en clima mediterráneo. Los objetivos de este estudio fueron determinar el efecto de diferentes estrategias de fertilización y dosis en la composición de los lixiviados y en el uso del N por las plantas, establecer un balance de N basado en la estrategia de fertilización y dosis aplicadas y establecer un modelo lineal para predecir la concentración de N en los lixiviados de un cultivo de Viburnum tinus L. `Eve Price´. Se aplicaron al cultivo fertilizantes mediante fertirrigación continua ( ). Las pérdi-das de N por lixiviación aumentaron significativamente al aplicar el tratamiento CRFC (48% del N total). La concentración de N en los lixiviados de todos los tratamientos se correlacionó con las variables temperatura del sustrato y precipitación, por lo que éstas deben ser consideradas para determinar la dosis de fertilizantes a añadir a un cultivo, especialmente cuando se usan CRF, y así evitar elevadas pérdidas de N por lixiviación.

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Longevities and nitrogen, phosphorus, and potassium release patterns of polymer‐coated controlled‐release fertilizers at 30°C and 40°C

Cited by 66 publications

References 19 publications

Nutrients Release from a Novel Gel-Based Slow/Controlled Release Fertilizer

Nutrients Release from a Novel Gel-Based Slow/Controlled Release Fertilizer

Nitrogen-use efficiency and economic efficiency of slow-release N fertilisers applied to irrigated turfs in a Mediterranean environment

Effects of climate and fertilization strategy on nitrogen balance in an outdoor potted crop of Viburnum tinus L.

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