An evaluation of urea-rubber matrices as slow-release fertilizers

Hassan, Zahid; Young, Scott D.; Hepburn, C.; Arizal, Ridha

doi:10.1007/bf01116180

Cited by 15 publications

(8 citation statements)

References 10 publications

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“…[59][60][61] For instance, in the case of the urearubber matrix, nitrogen release was observed to be increased with temperature under moist soil conditions. 62 Similarly, faster nitrogen release rates from polymer coated urea and higher nitrogen release plateaus were noticed by M. El-Hout et al (2021) 63 during times of the year when higher temperatures and precipitation amounts prevailed. The nitrogen release pattern has been positively correlated with soil temperature and soil moisture in several studies; however temperature has been found to be the major controlling factor.…”

Section: Physicochemical Analysis Of Soilmentioning

confidence: 68%

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Synthesis and characterization of a novel slow-release nanourea/chitosan nanocomposite and its effect on Vigna radiata L.

Sharma

Kumar

Singh

2022

Environ. Sci.: Nano

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Section: Physicochemical Analysis Of Soilmentioning

confidence: 68%

“…63,64 The release pattern of nitrogen in a specified period of time is also controlled by the nature, composition and thickness of the coating material. 61–63…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of a novel slow-release nanourea/chitosan nanocomposite and its effect on Vigna radiata L.

Sharma

Kumar

Singh

2022

Environ. Sci.: Nano

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“…Insufficient soil moisture can be buffered by coating seeds with a water absorbing substance. Seed coating technology has a variety of applications, such as delivering nutrients [ 14 , 15 ], peroxides to provide oxygen, hormones to improve growth [ 16 ] or hydro-absorbers to improve water supply [ 17 , 18 ]. Geohumus and Stockosorb are two commercially available hydro-absorbers able to store an amount of water several times their weight.…”

Section: Introductionmentioning

confidence: 99%

Seed Coating with Hydro-Absorbers as Potential Mitigation of Early Season Drought in Sorghum (Sorghum bicolor L. Moench)

Gorim

Asch

2017

Biology

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Climate change poses a threat to sorghum production systems by shifting the onset of the rainy season to a later date, increasing the risk of crop failure during crop establishment. The effects of drought on sorghum during seedling establishment have not been determined. Coating seeds with a water absorbing substance offers a way to buffer the seed against insufficient moisture in the surrounding soil. Seeds of two different sorghum varieties were coated with one of two commercially available hydro-absorbers: Stokosorb® and Geohumus®. These hydro-absorbers have the capacity to store water several times their own weight. The aim of this study was to compare the effects of the cited hydro-absorbers on early seedling growth of two sorghum landraces under different levels of soil water deficit. Seedlings were grown for 12 days under three water availability levels (Field capacity (FC), 50% of FC, and 25% of FC). The seedlings under water limited treatments were subsequently re-watered. Biomass, root length, plant height, leaf area, and leaf extension rate were monitored in two-day intervals for 24 days. Coating strongly affected seedling growth both under fully watered and water deficit conditions. Sorghum varieties differed in their responses to both soil water deficit and coating materials. In general, Stockosorb improved seedling performance under water limited conditions particularly by promoting root growth, whereas Geohumus did not.

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“…Seed coats may contain specific substances such as nutrients (Silcock and Smith 1982, Scott et al. 1987, Hassan et al. 1990) and peroxides to provide oxygen, or hormones (Powell and Matthew 1988).…”

Section: Introductionmentioning

confidence: 99%

Effects of Composition and Share of Seed Coatings on the Mobilization Efficiency of Cereal Seeds During Germination

Gorim

Asch

2011

J Agronomy Crop Science

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Cereal production systems are increasingly threatened by suboptimal water supply or intermittent drought spells early in the planting season. Seed coated with hydrophilic materials or hydro‐absorbers that increase the amount of water available for germination and seedling development is a promising approach to improving stand establishment under changing conditions. Barley, rye and wheat grains with combinations of hydro‐absorber, humic acid and Biplantol® in different shares of the total seed mass were germinated in plates at 25 °C on moist filter paper. Germination rates, resource partitioning and mobilization efficiency were assessed and compared with those of uncoated seeds. Results show a strong influence of coat thickness and composition on the germination rate and the efficiency of mobilization of carbohydrates stored in the endosperm. In general, coating significantly reduced germination rate and total germination as compared to uncoated seeds in all cereals tested. Differences in coating thickness had a distinct effect on germination rate for most combinations of coatings and species. Germination rates increased with increasing coat size. This effect was most pronounced for coatings containing hydro‐absorbers and least pronounced for coatings containing humic acid or Biplantol®. Coating generally increased the amount of carbohydrates partitioned to the roots, and thick coating increased the efficiency of grain reserve mobilization compared with the uncoated seeds. Differences between species and the implications for coating‐related changes in germination metabolism are discussed.

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An evaluation of urea-rubber matrices as slow-release fertilizers

Cited by 15 publications

References 10 publications

Synthesis and characterization of a novel slow-release nanourea/chitosan nanocomposite and its effect on Vigna radiata L.

Synthesis and characterization of a novel slow-release nanourea/chitosan nanocomposite and its effect on Vigna radiata L.

Seed Coating with Hydro-Absorbers as Potential Mitigation of Early Season Drought in Sorghum (Sorghum bicolor L. Moench)

Effects of Composition and Share of Seed Coatings on the Mobilization Efficiency of Cereal Seeds During Germination

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