Dynamic of Water Absorption in Controlled Release Fertilizer and its Relationship with the Release of Nutrient

Trinh, Thanh H.; KuShaari, KuZilati

doi:10.1016/j.proeng.2016.06.444

Cited by 21 publications

(12 citation statements)

References 18 publications

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“…Several authors have examined the favorable effects that increasing the dose of nutrients may have on growth and other desirable plant characteristics, both in the nursery and in the field [34,[62][63][64]. Controlled-release fertilizers minimize the loss of nutrients by leaching, due to their potential to supply nutrients in synchrony with the needs of the plant [65] and in this work the plant responses, expressed in morphological and physiological quality indices, confirmed these effects ( Table 3 and Figure 2).…”

Section: Nutritionmentioning

confidence: 99%

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

Aispuro

Prieto-Ruíz

Aldrete

et al. 2020

Forests

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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.

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Section: Nutritionmentioning

confidence: 99%

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

Aispuro

Prieto-Ruíz

Aldrete

et al. 2020

Forests

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“…To achieve a more sustainable agriculture, controlled release fertilizers (CRFs), compared to conventional fertilizers, contribute to provide nutrients to the crops throughout their cycle with a single application, allowing the release of the agrochemical at a controlled rate and maintaining its concentration within the optimum limits for a certain period of time, reducing toxicity for seeds. CRF improves the absorption of nutrients by crops through a synchronized release, increasing the fertilizer use efficiency and reducing significantly loss of nutrients …”

Section: Introductionmentioning

confidence: 99%

Controlled release on sand bed columns and biodegradability in soil of chitosan: Hydroxypropyl methylcellulose films

Melaj

Daraio

Vázquez

2019

J of Applied Polymer Sci

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The main purpose of this work is to prepare and characterize films based on chitosan (Q) and hydroxypropyl methylcellulose (HPMC) blends to achieve adequate properties to be used as coating of conventional fertilizers to prolong their availability for crops. The films loaded with KNO 3 as model fertilizer were prepared by casting. Release of fertilizer was studied using sand bed columns. To quantify films durability in soil, their areas were measured in function of time. Results showed that chitosan substantially improved the durability of HPMC, lengthening its permanence in soil 900‰. Relative humidity had influence in mechanical properties. Comparing KNO 3 powder and that loaded in the film, the time of residence in the column was much lower for the powder than the second one: 4 and 56 days, respectively. Chitosan-HPMC film would be promising as polymeric coating for controlled release fertilizers taking into account field conditions.

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“…As the coating is stretched, the micro-pore diameters increase, allowing nutrient release (Hauck, 1985). This process is described in detail by Trinh and KuShaari (2016). The release of nutrient from these polymer-coated fertilizers is usually temperature dependant and largely unaffected by wet-dry cycling, pH and soil microbial activity (Christianson, 1988), although the moisture contents of the medium in which the granules are placed and the relatively solubility of the coated nutrients will affect release kinetics (Du et al, 2006).…”

Section: Controlled-release Fertilizersmentioning

confidence: 99%

“…More recently, novel materials such as modified biopolymers, nanocomposites and natural macromolecular materials have been investigated (Irfan et al, 2018, Trinh andKuShaari, 2016) in response to concerns about environmental pollution caused by polymers persisting in the environment (Azeem et al, 2014). Consequently, compounds such as starch (Qiao et al, 2016, Vadjung andSaengsuwan, 2018), lignin (Mulder et al, 2011, Rotondo et al, 2018, cellulose (Costa et al, 2013, Li et al, 2016, chitosan (Araujo et al, 2017, Wu andLiu, 2008) and various other naturally occurring elements (Ma et al, 2013b, Xie et al, 2012 have been investigated…”

Section: Bio-materials Fertilizers With Controlled-release Functionmentioning

confidence: 99%

“…Polymer-coated urea utilizes a controlled-release mechanism in which moisture surrounding the granule moves through microscopic pores in the polymer coat to condense on the soluble nutrient core. This increases the internal osmotic pressure, causing the granule to swell and release urea-N through the stretched pores via diffusion (Hauck, 1985, Jacobs, 2005, Trinh and KuShaari, 2016.…”

Section: Polymer-coated Ureamentioning

confidence: 99%

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The impact of banding urea and enhanced efficiency fertilizers on nitrogen transformations and the implications for nitrogen use efficiency in high-risk environments

Janke¹

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The efficient use of fertilizer-nitrogen (N) is a major global challenge for intensive agricultural systems. A suite of enhanced efficiency fertilizers (EEFs) have been developed in response to poor N use efficiency (NUE) in agriculture, but mechanistic understanding to support their effective utilization is not well developed. In particular, banding N-fertilizer creates a vastly different biochemical environment to broadcast and / or incorporated applications, potentially influencing the efficacy of EEFs. Furthermore, the influence of tropical and subtropical conditions on EEF efficacy is not well characterized. Thus, application of EEFs in cropping systems utilizing banded application and / or in (sub) tropical environments is occurring under conditions for which there is little guidance on effective use strategies. The effects of fertilizer-N from coastal cropping areas (i.e., sugarcane) of northeast Australia on nutrient-sensitive ecosystems of the Great Barrier Reef (GBR) is a prominent example of a high-risk environment in which effective utilization of EEFs may mitigate environmental impacts through improved on-farm NUE.The objective of this PhD research was to take a mechanistic approach to investigating the efficacy of banded EEF's in conditions typical of the (sub) tropical environment of the Australian sugarcane industry. The aim was to develop mechanistic understanding that would underpin agronomic advice supporting the effective utilization of banded EEFs in sugarcane and other high-risk agricultural systems.An initial laboratory incubation (Chapter 3) investigated the fertosphere (soil within ca.1-2.5 cm of the fertilizer band) impacts of various nitrification inhibitors (NIs) and a polymercoated urea (PCU) on urea-N release and hydrolysis, and the subsequent biochemical effects on N cycling, in a range of soils with varying physico-chemicals properties and under conditions typical of a tropical climate. Compared to standard urea, limited benefits from NIs were found within the fertosphere irrespective of soil type, as the hostile conditions associated with rapid hydrolysis of highly concentrated urea-N already had an inhibitory effect on nitrification. Within PCU bands, lower-than-expected concentrations of mineral N and the retention of significant portions of urea-N in granules led to a hypothesis that incomplete release of urea-N from banded PCU granules may be a result of the proximity of neighbouring granules causing diminished concentrations gradients. Batch-style diffusion studies were conducted (Chapters 4 -6) to better explore N distribution and transformation and the biochemical changes induced by banded EEFs beyond the fertosphere. Despite limited movement beyond the fertosphere, it was shown that the urease Financial support

show abstract

Dynamic of Water Absorption in Controlled Release Fertilizer and its Relationship with the Release of Nutrient

Cited by 21 publications

References 18 publications

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

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

Controlled release on sand bed columns and biodegradability in soil of chitosan: Hydroxypropyl methylcellulose films

The impact of banding urea and enhanced efficiency fertilizers on nitrogen transformations and the implications for nitrogen use efficiency in high-risk environments

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