scholarly journals Effects of Phosphorous and Phosphoric Acids on Growth and Phosphorus Concentrations in Container-grown Tropical Ornamental Plants

2006 ◽  
Vol 16 (1) ◽  
pp. 105-108 ◽  
Author(s):  
Timothy K. Broschat
Keyword(s):  
Phosphoric Acid ◽  
Ornamental Plants ◽  
Foliar Spray ◽  
Phosphorous Acid ◽  
Nutrient Content ◽  
Potassium Sulfate ◽  
Coated Urea ◽  
Synergistic Response ◽  
Chinese Hibiscus ◽  
P Sources

Chinese hibiscus (Hibiscus rosa-chinensis), shooting star (Pseuderanthemum laxiflorum), downy jasmine (Jasminum multiflorum), areca palm (Dypsis lutescens), and `Jetty' spathiphyllum (Spathiphyllum) were grown in containers using Osmocote Plus 15-9-12 (15N-3.9P-10K), which provided phosphorus (two experiments), or resin-coated urea plus sulfur-coated potassium sulfate, which provided no phosphorus (one experiment). Plants were treated with water drenches (controls), drenches with metalaxyl fungicide only, drenches with phosphoric acid (PO4-P), drenches with metalaxyl plus phosphorus from phosphoric acid, drenches with PhytoFos 4-28-10 [4N-12.2P-8.3K, a fertilizer containing phosphorous acid (PO3-P), a known fungicidal compound], or a foliar spray with PhytoFos 4-28-10. Plants receiving soil drenches with equivalent amounts of P from PhytoFos 4-28-10, PO4-P, or PO4-P+metalaxyl generally had the greatest shoot and root dry weights and foliar PO4-P concentrations. There were no differences between the control and metalaxyl-treated plants, indicating that root rot diseases were not a factor. Therefore, responses from PhytoFos 4-28-10 were believed to be due to its nutrient content, rather than its fungicidal properties. Foliar-applied PhytoFos 4-29-10 produced plants that were generally similar in size to control plants or those receiving metalaxyl only drenches. Fertilizers containing PO3-P appear to be about as effective as PO4-P sources when applied to the soil, but are relatively ineffective as a P source when applied as a foliar spray. A distinct positive synergistic response for shoot and root dry weights and foliar PO4-P concentrations was observed for the PO4-P+metalaxyl treatment when no P was applied except as a treatment.

scholarly journals Phosphorous Acid and Phosphoric Acid: When all P Sources are not Equal

EDIS ◽  
1969 ◽  
Vol 2005 (4) ◽  
Author(s):  
Asha M. Brunings ◽  
Lawrence E. Datnoff ◽  
Eric H. Simonne
Keyword(s):  
Phosphoric Acid ◽  
Nutritional Value ◽  
Fungicidal Activity ◽  
Phosphorous Acid ◽  
Cooperative Extension Service ◽  
Publication Date ◽  
University Of Florida ◽  
Phosphorus Containing ◽  
Actual Content ◽  
P Sources

While growers are familiar with phosphorus-containing fertilizer, the abundance of terms, apparently similar (such as phosphoric acid and phosphorous acid), may create some confusion on the actual content and efficacy of these products. Some common phosphorus-containing compounds are listed in Table 1. Some claims found in commercial literature and product descriptions refer to phosphorous acid as a “supplemental fertilizer,” while others present it as a fungicide (Table 2). The purpose of this article is to explain what phosphorous acid is and to examine both the fungicidal activity and nutritional value of phosphorous acid. This document is HS1010, one of a series of the Horticultural Sciences Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Publication date: April 2005. HS1010/HS254: Are Phosphorous and Phosphoric Acids Equal Phosphorous Sources for Plant Growth? (ufl.edu)

scholarly journals Çeşitli Biyoaktivatör Uygulamalarının Çarkıfelek ve Guava Bitkilerinin Fidan Gelişimi Üzerine Etkileri

2020 ◽  
Vol 8 (2) ◽  
pp. 421
Author(s):  
Canan Nilay Duran ◽  
Gizem Demirkaplan ◽  
Sevinç Şener
Keyword(s):  
Plant Height ◽  
Growth And Development ◽  
Ornamental Plants ◽  
Nutrient Content ◽  
Psidium Guajava ◽  
Stem Diameter ◽  
Sapling Growth ◽  
Number Of Leaves ◽  
Average Plant ◽  
Average Plant Height

Passionflower is a member of Passifloraceae family, it can be used as medicinal and ornamental plants in addition to its consumption as fruit in the world. Guava (Psidium guajava L.) fruits, which has a rich nutrient content, are consumed both fresh and processed. Passionfruit and guava plants, which can only be cultivated in temperate southern coasts in our country, have gained commercial importance because of the fruits' export potential, high medical importance and nutrient. This study was carried out to determine the effects of some bioactivator applications on the criteria of sapling growth and development of passionflower and guava plants. The experiment was conducted between 2018-2019 under greenhouse conditions. Saplings obtained from seed germination in Akdeniz University Faculty of Agriculture Research and Experiment Area were used as plant material. 3 different commercial preparations called Messenger, Crop-set and ISR-2000 were used as bioactivators. Plant height (cm), stem diameter (mm) and number of leaves (number / plant) were measured weekly, in order to determine the effect of the applications on the growth and development of saplings. At the end of the study, it was determined that the highest average plant height (10.17 cm), stem diameter (13.53 mm) were obtained in ISR-2000 application. The highest average plant height (11.93 cm), stem diameter (16.44 mm) and number of leaves (9.07 units / plant) were obtained from Messenger application in guava plant. When the results obtained are evaluated, it is recommended that ISR-2000 bioactivator can be applied in passionflower sapling cultivation and Messenger bioactivator can be applied for guava sapling cultivation.

scholarly journals EFFECT OF FOLIAR APPLICATION OF VERMIWASH ON GROWTH AND QUALITY OF BRINJAL

2020 ◽  
Vol 3 (1) ◽  
pp. 31-34
Author(s):  
M. Yasmin ◽  
M.S. Rahman ◽  
M.A. Rahman ◽  
F.S. Shikha ◽  
M.K. Alam
Keyword(s):  
Agricultural Research ◽  
Foliar Application ◽  
Foliar Spray ◽  
Growth Yield ◽  
Nutrient Content ◽  
Growth And Yield ◽  
Control Treatment ◽  
Research Station ◽  
Water Control

The experiment was conducted at Regional Agricultural Research Station (RARS), Jamalpur, Bangladesh during the period of 2019-2020 and 2020-2021 to investigate the effect of vermiwash on growth, yield and quality of brinjal and to find out suitable foliar dose of vermiwash for optimizing the yield of brinjal. There were five treatments comprising T1= Chemical fertilizer (CF) + foliar spray of distilled water (control), T2 = CF + foliar spray of 10% vermiwash, T3 = CF + foliar spray of 20% vermiwash, T4 = CF + foliar spray of 30% vermiwash and T5= CF + foliar spray of 40% vermiwash. Results revealed that, vermiwash treated brinjal plants showed better growth and yield parameters than the control plants. The highest average brinjal fruit yield (29.99 t ha-1) was found in T3 treatment i.e., foliar spray of 20% concentration of vermiwash and the lowest (26.35 t ha-1) came from control. On the other hand, nutritional quality (moisture content, TSS, β carotene and nutrient content) were seen to be higher in vermiwash treated treatment compared to control treatment. The study suggests that, 20% concentration of vermiwash could be used as effective foliar spray for eco-friendly and higher yield of brinjal.

Productivity and Profitability of Fodder Cowpea Cultivars under Various Zinc Management Practices in IGP of India

2021 ◽  
Author(s):  
Manisha . ◽  
Rakesh Kumar ◽  
Hardev Ram ◽  
Rajesh Kumar Meena ◽  
Dinesh Kumar ◽  
...  
Keyword(s):  
Management Practices ◽  
Block Design ◽  
Foliar Spray ◽  
Nutrient Content ◽  
Available N ◽  
Cowpea Cultivars ◽  
Fertility Status ◽  
Net Returns ◽  
Green Fodder ◽  
Fodder Yield

Background: Soils of North-Western Indo-Gangetic plains (IGP) are deficient in zinc content which may lead to lower forage yield of cowpea. Henceforth, the adequate supply of zinc either through soil or foliar spray and selection of suitable cultivar of cowpea could enhance the fodder productivity.Methods: A field experiment was laid out in factorial randomized block design during Kharif season, 2019 to assess the effect of different zinc management practices (control; 10 kg ZnSO4; 20 kg ZnSO4; 0.5% ZnSO4 foliar spray at 20 DAS; 0.5% ZnSO4 foliar spray at 20 and 40 DAS) on productivity and profitability of cowpea cultivars (C-152; MFC-08-14; MFC-09-1) and post-harvest fertility status of soil.Result: Cowpea cv. C-152 showed the highest growth attributes, green fodder yield, nutrient content as well as uptake and net returns. Among different zinc management practices, the application of 20 kg ZnSO4 as basal application or 0.5% ZnSO4 foliar spray at 20 and 40 DAS recorded significantly highest growth, green fodder yield, nutrient content as well as uptake and net returns. Significantly highest soil OC, available N, K and Zn were also noted under these treatments. It is inferred that cowpea cv. C-152 and application of either 20 kg ZnSO4 as basal or 0.5% ZnSO4 as foliar spray at 20 and 40 DAS were found the most productive and profitable approach and sustained the soil fertility status.

Preparation and flame retardancy of epoxy resin phosphoric acid modified poly-acrylate resin

2019 ◽  
Vol 48 (3) ◽  
pp. 197-201
Author(s):  
Buqin Xu ◽  
Guilong Xu ◽  
Hui Qiao ◽  
Yun Liang ◽  
Jin Yang ◽  
...  
Keyword(s):  
Free Radical ◽  
Phosphoric Acid ◽  
Flame Retardant ◽  
Epoxy Resin ◽  
Radical Polymerization ◽  
Flame Retardancy ◽  
Phosphorous Acid ◽  
Free Radical Polymerization ◽  
Flame Resistance ◽  
Content Type

Purpose The flammability of poly-acrylate (PA) resin is a major disadvantage in applications that require flame resistance. It has been reported that a flame-retardant PA resin could be prepared by covalent incorporate phosphorous containing monomer with vinyl group via free radical polymerization, and the prepared modified PA resin is expected to exhibit better flame resistance than those by an additive approach. However, the phosphorus-containing monomers reported previously are made from expensive or toxic materials, and the production procedure is tedious and under harsh reaction conditions, which are not feasible for industrial application. Therefore, the purpose of this paper is the preparation of flame-retardant PA resin modified by epoxy resin phosphorous acid (EPPA) and the study of its flame retardancy. Design/methodology/approach EPPA is first prepared by epoxy resin E-51 and phosphorous acid and then used to prepare phosphorous containing PA resin by free radical polymerization. The flame retardancy of the prepared EPPA-modified PA (EPPA-PA) resin is studied. Findings The results show that EPPA can graft onto the PA polymer chain by free radical polymerization, the flame retardancy of the EPPA-PA resin increases as the EPPA content increasing. The flame retardancy of EPPA-PA resin prepared reaches 27.8% and can pass the V-0 rating in the UL-94 test when EPPA content is 30.0%. SEM and EDS results indicate that phosphorous element in the EPPA-PA resin shows a condensed-phase flame retardant effect. Research limitations/implications The grafting degree of EPPA cannot be accurately tested. Practical implications It is expected that the large-scale production of this epoxy resin phosphoric acid modified PA resin will enable practical industrial applications. Originality/value This method for synthesis of epoxy resin phosphoric acid modified PA resin is newfrangled.

scholarly journals The Synthesis of Organophosphorus Compounds from Phosphine and Alcohols in the Presence of Quinones and Redox Polymers on their Basis

2012 ◽  
Vol 14 (3) ◽  
pp. 191 ◽  
Author(s):  
B.A. Mukhitdinova ◽  
E.E. Ergozhin ◽  
G.S. Polimbetova ◽  
A.K. Borangazieva
Keyword(s):  
Phosphoric Acid ◽  
Organophosphorus Compounds ◽  
Synergetic Effect ◽  
Phosphorous Acid ◽  
Molecular Iodine ◽  
Aliphatic Alcohols ◽  
Redox Polymers ◽  
Oxidation Reduction ◽  
Organic Solutions ◽  
First Time

<p>This article presents the synthesis of phosphoric acid esters from phosphoric hydrogen РН3 and aliphatic alcohols. The process is based on the oxidation of phosphine by quinones and redox polymers on the basis of mono- and disubstituted quinoid derivatives of monoethanolamine vinyl ether. Molecular iodine is used as a catalyst. Two-, three-, four- and multicomp onent systems are studied in order to determine optimal conditions of the oxidation of phosphine quinones and repoxpolymers on their basis. The rate and selectivity of reaction were monitored by the absorption of РН<sub>3</sub>. As alcohols used aliphatic alcohols: BuOH, PrOH, EtOH, MeOH. Organophosphorus compounds were analyzed by a chromatographic method. It was established that alcohol solutions of individual components of reactionary system (quinones, redox ionites or iodine) are characterized by a low activity in relation to phosphine. Organophosphorus compounds are formed in insignificant quantities. In the mixed alcohol<br /> solution of benzoquinone takes place PH<sub>3</sub> oxidation forming trialkylphosphates. Conversion of phosphine constitutes 80-100%. Increasing the concentration of reagents of catalytic system has a positive effect on the process as a whole. Similar patterns were obtained when redox monomers and polymers on the base of quinones in the presence of iodine were used as oxidants. Esters of phosphoric acid – dialkylphosphites and esters of phosphorous acid – trialkylphosphates were identified as organophosphorus compounds. By selecting a redox agent in a zone of the catalysis it is possible to direct process in the desirable direction. The most activity in the oxidation of phosphine by iodine-alcohol solutions of quinoid monomers and polymers, is exhibited by 2-[N-(2-vinyloxy) ethyl]amino-NQ and polymer on their basis. Results of our experiments and literature data on oxidation-reduction processes with participation of iodine and quinones in organic solutions allowed to propose the separate oxidation-reduction mechanism of formation of organophosphorus compounds. In investigated multicomponent systems, the synergetic effect is manifested which is reached at the expense of distribution of oxidation-reduction functions among iodine, quinones and its derivatives. In this report, for the first time, it is established reactionary ability of quinones and redox ionites on their basis in an oxidizing alkoxylation of phosphine to valuable esters of acids of phosphorus. Reaction can be used for purification of exhaust and technological gases from phosphine and its utilization.</p>

scholarly journals THE EFFECTS OF VINE SPACING, SHOOT DENSITY AND FOLIAR KNO3 ON NUTRIENT CONTENT OF SEYVAL GRAPEVINES

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1147F-1147
Author(s):  
G.A. Cahoon ◽  
D.M. Scurlock ◽  
J. D. Lehman
Keyword(s):  
Foliar Spray ◽  
Nutrient Content ◽  
Shoot Density ◽  
Full Bloom ◽  
Foliar N ◽  
Fruit Maturity ◽  
Factorial Treatments

Factorial treatments of vine spacing, shoot density and foliar applications of KNO3 were imposed on 9-year-old Seyval grapevines during 1989. Rows were spaced 3.05 m apart; vines within the row were spaced 1.2, 1.8 or 2.4 m apart and trained to a bilateral cordon. Shoots were thinned to 10, 20 or 30/m of canopy. A solution containing 6 kg of KNO3/379 liters of water was applied as a foliar spray at 2-week intervals between June 1 and August 1, 1989 (5 applications). Each shoot was thinned to one cluster prior to full bloom. Vines spaced at 1.2, 1.8 and 2.4 m produced an average of 4.2, 5.9 and 7.3 kg/vine, respectively (11.3, 10.6 and 9.8 MT/ha). Cluster weight averaged .22 kg; fruit maturity averaged 19.7°Brix for all treatments. Applications of KNO3 increased foliar N, K, Fe, B, Cu and Na, but decreased P, Ca, Mg, Mn, and Zn. As vine spacing increased the concentration of foliar N, P, K decreased. As shoot density increased N, P, K, B, and Cu decreased, while Ca, Mg, Mn and Na increased. The experiment will be repeated in 1990.

scholarly journals Effects of Fertilization on the Growth and Quality of Container-grown Areca Palm and Chinese Hibiscus during Establishment in the Landscape

2010 ◽  
Vol 20 (2) ◽  
pp. 389-394
Author(s):  
Timothy K. Broschat ◽  
Kimberly Anne Moore
Keyword(s):  
Ornamental Plants ◽  
Plant Size ◽  
N Fertilization ◽  
N Application ◽  
Landscape Plants ◽  
Application Rates ◽  
Affected Plant ◽  
Highly Correlated ◽  
Chinese Hibiscus

The roots of container-grown ornamental plants primarily are concentrated within the original container substrate root ball during the establishment period following transplanting into the landscape. Plants growing in container substrates containing pine bark or peatmoss have higher nitrogen (N) requirements than in most landscape soils due to microbial immobilization of N by these organic components. However, use of high-N fertilizers, such as those used in container production of ornamentals, can cause imbalances with potassium (K) and magnesium (Mg) when used on palms in sandy landscape soils. Areca palm (Dypsis lutescens) and chinese hibiscus (Hibiscus rosa-sinensis ‘President’) that had been growing in containers were transplanted into a landscape soil to determine if high N fertilization during the establishment period could accelerate the rate of establishment without exacerbating K and Mg deficiencies. Although plants of both species had the darkest green color and largest size when continuously fertilized with high N fertilizer, this treatment did induce Mg deficiency in both species. Plant size and color for both species were highly correlated with cumulative N application rates, but also with initial N application rates, suggesting that high N fertilization during the first 6 months affected plant quality at 12 and 24 months after planting, even if high N fertilization was discontinued. However, continued use of a moderate N landscape palm maintenance fertilizer ultimately produced areca palm plants as good as those receiving high N during the establishment period.

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