Productive characteristics, nutrition and agronomic efficiency of polymer-coated MAP in lettuce crops

Chagas, Wantuir Filipe Teixeira; Emrich, Eduardo Bucsan; Guelfi, Douglas Ramos; Caputo, André Luiz Carvalho; Faquin, Valdemar

doi:10.5935/1806-6690.20150006

Cited by 12 publications

(10 citation statements)

References 18 publications

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“…These results agree with those of Corrêa et al (2008) in maize crops and Chagas et al (2015) in two lettuce crops, who observed a reduction in phosphorus use efficiency with dosage increases. However, Chagas et al (2015) found increased phosphate efficiency with polymer-coated MAP fertilizer in both lettuce crops, improving residual phosphorus used, but not for onions (Chagas et al, 2016). However, increased nutrient availability and the source used are not the only factors that can alter the efficiency rate.…”

Section: Nutrient Utilization Efficiencysupporting

confidence: 82%

Phosphorus use efficiency in maize as a function of different sources

Pelá¹,

Gonçalves²,

Pereira³

et al. 2017

Aust J Crop Sci

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The objective of this study was to evaluate the initial growth of maize plants and phosphorus use efficiency due to phosphate fertilization with or without polymer coating for controlled nutrient release. The experiment was conducted in a greenhouse. Ten treatments were accomplished under a 5 x 2 factorial scheme, with five doses of phosphorus and two types of monoammonium phosphate (MAP), with and without polymer coating. The experimental design consisted of three maize plants grown in a 5 liter plastic pot. The study was conducted for 30 days when the phosphorus content, dry matter production and nutrient use efficiency were measured in the plant. The data obtained were submitted to analysis of variance by the F-test at 5% probability, the quantitative data were submitted to regression analysis according to the doses, and the qualitative data according to the source by the Tukey test. The plants fertilized with conventional MAP had averages higher than the ones fertilized with polymer-coated MAP at 50, 150 and 200 mg doses of P dm -3 soil. The initial growth of maize plants was higher when they were fertilized with conventional MAP. The efficiency in P use did not increase with the polymer-coated source, but decreased with doses of both sources

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Section: Nutrient Utilization Efficiencysupporting

confidence: 82%

Phosphorus use efficiency in maize as a function of different sources

Pelá¹,

Gonçalves²,

Pereira³

et al. 2017

Aust J Crop Sci

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“…The coating of phosphate fertilizers with anionic polymers with affinity for cations such as aluminum and iron may attenuate the adverse effects of soil P precipitation and increase the efficiency of phosphate fertilization (Chagas et al, 2015;2016a;2016b). Adding both Mg and anionic polymers to the coating may result in increased P uptake and coffee plant growth compared with other phosphate fertilizer technologies, such as resincoated fertilizers, which decrease the rate of P released from the fertilizer granule to the soil (Huett;Gogel, 2000;Du;Zhou, 2006;Broschat;Moore, 2007;Sanders et al, 2012;Adams;Frantz;Bugbee, 2013).…”

Section: Introductionmentioning

confidence: 99%

Monoammonium phosphate coated with polymers and magnesium for coffee plants

et al. 2018

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The coating of phosphate fertilizer granules with polymers and magnesium (Mg) is a technology that can improve phosphorus (P) use efficiency and mitigate problems of low Mg supply in coffee crops. The objective of this work was to evaluate the growth and nutrition characteristics of coffee seedlings and the agronomic efficiency (AE) of monoammonium phosphate (MAP) coated with anionic polymers and Mg in comparison with other phosphate fertilizer technologies. The experiment was carried out in a greenhouse in 20 L pots. Two five-month-old coffee seedlings were transplanted into each pot. The experimental design was completely randomized with three replicates. The following treatments, applied at a dose corresponding to 20 g pot -1 of P 2 O 5 , were carried out: MAP; MAP coated with anionic polymers (Policote Phós ® ); MAP coated with anionic polymers+Mg (Policote Phós_Mg ® ); Top-Phós ® ; and Agrocote ® . A control (without P) was prepared. Plant height; leaf area; dry mass of leaves, stems, and roots; total dry mass; shoot/root ratio; specific leaf weight; P and Mg content in plants and their availability in the soil after cultivation and efficiency indicesof the phosphate fertilization treatment were evaluated. The recovery of applied P and the agronomic efficiency of phosphate fertilizers was found to increase in the following order: MAP = Top-Phós ® = Agrocote ®

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“…Although there are many studies that demonstrate the CSRF water dissolution rate (Bortolin et al, 2012;Lubkowski, 2014;Lubkowski et al, 2015;Ahmad et al, 2015) and agronomic efficiency (Pauly et al, 2002;Figueiredo et al, 2012;Silva et al, 2012;Chagas et al, 2015), little is known about the characteristics of organic polymers that could reduce the negative effects of previous fertilizer P contact time with soil on P availability and the consequent growth response by the plant.…”

Section: Introductionmentioning

confidence: 99%

Organic acid coated-slow-release phosphorus fertilizers improve P availability and maize growth in a tropical soil

Teixeira

Silva

Sousa

et al. 2016

J. Soil Sci. Plant Nutr.

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In this paper, we report the results of studies on the solubility (water solubility trial) and the response by plants (greenhouse pot experiment using Zea mays) for four types of monoammonium phosphate fertilizers (Conventional MAP -MAP 1 , MAP coated with a natural organic acid -MAP 2 , MAP coated with a synthetic organic acid -MAP 3 , and MAP coated with a peat humic organic acid -MAP 4 ) applied at five increasing doses (0, 100, 300, 600 and 1200 mg P dm -3 ) and pre-incubated with the soil for five lengths of time before planting (0, 15, 30 and 60 d). The coating with organic acids reduced the water solubility of the P fertilizers -MAP 4 provided a more gradual release of P over time. In the soil pot experiment, it was found that MAP 1 required the highest dose to reach 90% of dry matter accumulation by the maize plant, followed by the Coated-Slow-Release Fertilizers (CSRF). The agronomic efficiency (AE) of P applied as the CSRF was 3 to 13% greater than that of MAP 1 . In addition, MAP 4 led to higher values of AE (+11%) and apparent P recovery by maize (+41%) in comparison to MAP 1 . The physicochemical properties imposed by the chemical composition of the organic acid coatings generated fertilizers with distinct release rates and improved agronomic efficiencies.

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Productive characteristics, nutrition and agronomic efficiency of polymer-coated MAP in lettuce crops

Cited by 12 publications

References 18 publications

Phosphorus use efficiency in maize as a function of different sources

Phosphorus use efficiency in maize as a function of different sources

Monoammonium phosphate coated with polymers and magnesium for coffee plants

Organic acid coated-slow-release phosphorus fertilizers improve P availability and maize growth in a tropical soil

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