scholarly journals Properties of Coated Controlled Release Diammonium Phosphate Fertilizers Prepared with the Use of Bio‐based Amino Oil

2020 ◽  
Vol 97 (7) ◽  
pp. 751-763 ◽  
Author(s):  
Asma Sofyane ◽  
Mohammed Lahcini ◽  
Abdellatif El Meziane ◽  
Mehdi Khouloud ◽  
Abdelmalek Dahchour ◽  
...  
Keyword(s):  
Controlled Release ◽  
Diammonium Phosphate ◽  
Phosphate Fertilizers

Development and Testing of Improved Efficiency Boron-Enriched Diammonium Phosphate Fertilizers

2021 ◽  
Author(s):  
Tayyaba Samreen ◽  
Fien Degryse ◽  
Roslyn Baird ◽  
Rodrigo Coqui da Silva ◽  
Zahir Ahmad Zahir ◽  
...  
Keyword(s):  
Diammonium Phosphate ◽  
Phosphate Fertilizers

Controlled release of phosphorus fertilizers by small, frequent additions in water solution

1998 ◽  
Vol 78 (2) ◽  
pp. 317-320 ◽  
Author(s):  
M. Nyborg ◽  
E. D. Solberg ◽  
D. G. Pauly
Keyword(s):  
Controlled Release ◽  
Key Words ◽  
Water Solution ◽  
P Uptake ◽  
Ammonium Polyphosphate ◽  
Diammonium Phosphate ◽  
Monoammonium Phosphate ◽  
Full Dose ◽  
Key Words Barley ◽  
Phosphorus Fertilizers

Controlled release of P was investigated with barley plants grown on two soils. Phosphorus fertilizers (monoammonium phosphate [MAP], diammonium phosphate [DAP] and ammonium polyphosphate [APP]) were dissolved in water and were applied full dose at sowing; 1/22 dose every 2nd day and 1/4 dose each 11th day. Uptake of fertilizer P in barley was much greater when the P was applied every 2nd and 11th day compared to only the day of sowing. Key words: Barley, diammonium phosphate, monoammonium phosphate, P uptake, P yield, release of P

The effect of method of application and presence of sulphate on phosphate fixation from three phosphate fertilizers applied to a krasnozem soil

1980 ◽  
Vol 20 (105) ◽  
pp. 486 ◽  
Author(s):  
RL Aitken ◽  
JD Hughes
Keyword(s):  
Dry Matter ◽  
Phosphorus Uptake ◽  
Diammonium Phosphate ◽  
Dry Matter Yield ◽  
Phosphate Fertilizers ◽  
Tomato Plants ◽  
Monocalcium Phosphate ◽  
Diffusion Rates ◽  
Phosphate Fixation ◽  
P Fertilizers

Fixation of phosphate from monocalcium, monoammonium and diammonium phosphate in a krasnozem soil was investigated in two glasshouse trials. The extent of fixation was assessed from the dry matter yield and phosphorus uptake of tomato plants. Less phosphate was fixed from monocalcium phosphate than from the ammonium phosphates, which was attributed to the higher diffusion rates of the latter and to the precipitation of dicalcium phosphate at the site of monocalcium phosphate placement. Banding of sub-optimal quantities of phosphorus increased yields, although the results suggest that banding only temporarily reduces fixation of the ammonium phosphates. Sulphate significantly increased the uptake of phosphorus when added with each of the three P fertilizers. The effect was greater when the fertilizer was banded than when mixed with the soil.

Preparation, forms and properties of controlled-release phosphate fertilizers

1993 ◽  
Vol 35 (1-2) ◽  
pp. 13-24 ◽  
Author(s):  
N. S. Bolan ◽  
M. J. Hedley ◽  
P. Loganathan
Keyword(s):  
Controlled Release ◽  
Phosphate Fertilizers

scholarly journals Coated Diammonium Phosphate Combined With Humic Acid Improves Soil Phosphorus Availability and Photosynthesis and the Yield of Maize

2021 ◽  
Vol 12 ◽  
Author(s):  
Qi Chen ◽  
Zhaoming Qu ◽  
Zeli Li ◽  
Zixin Zhang ◽  
Guohua Ma ◽  
...  
Keyword(s):  
Humic Acid ◽  
Controlled Release ◽  
Soil Phosphorus ◽  
Physiological Mechanism ◽  
Soil Nutrient ◽  
Nutrient Supply ◽  
Diammonium Phosphate ◽  
Growth And Yield ◽  
P Content ◽  
P Fertilizers

Controlled release phosphorus (P) fertilizers and humic acid (HA) applications are two effective and significant techniques or measures for preventing P loss and enhancing maize development. However, the underlying physiological mechanism of how the controlled release P fertilizers combined with HA affect the maize production and P-use efficiency (PUE) remains unknown. The effects of applying coated diammonium phosphate (CDAP) and HA together on soil nutrient supply intensity, soil phosphatase activity, photosynthesis, endogenous hormone contents, and yield of maize, as well as PUE, were examined in this study. In a pot experiment, two types of P fertilizers—CDAP and diammonium phosphate (DAP)– as well as two HA application rates (0 and 45 kg ha–1) and two P levels (60 and 75 kg P2O5 ha–1) were utilized. Results showed that the key elements that influence the growth and yield of the maize were the availability of P content in soil, plant photosynthesis, and hormone levels. The combination of CDAP and HA had a greater impact on yield and PUE over the course of 2 years than either DAP alone or DAP combined with HA. Besides, using CDAP in combination with HA increased the yield and PUE by 4.2 and 8.4%, respectively, as compared to the application of CDAP alone at 75 kg P2O5 ha–1. From the twelve-leaf to milk stages, the available P content in the soil was increased by an average of 38.6% with the combination of CDAP and HA compared to the application of CDAP alone at 75 kg P2O5 ha–1. In addition, the application of CDAP combined with HA boosted the activities of ATP synthase, as well as the content of cytokinin (CTK), and hence improved the maize photosynthetic rate (Pn). When compared to the application of CDAP alone or DAP combined with HA, the Pn of CDAP + HA treatments was enhanced by 17.9–35.1% at the same P rate. In conclusion, as an environmentally friendly fertilizer, the combined application of CDAP and HA improved the intensity of the soil nutrient supply, regulated photosynthetic capabilities, and increased the yield and PUE, which is important for agricultural production, P resource conservation, and environmental protection.

scholarly journals Valorization of the Phosphate Fertilizers Catalytic Activity in 1-(Benzothiazolylamino) Methyl-2-Naphthol Derivatives Synthesis

2019 ◽  
Vol 14 (2) ◽  
pp. 238 ◽  
Author(s):  
Omar Zimou ◽  
Badr Malek ◽  
Achraf Elhallaoui ◽  
Tourya Ghailane ◽  
Rachida Ghailane ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Reaction Times ◽  
Diammonium Phosphate ◽  
Phosphate Fertilizers ◽  
Catalytic Activities ◽  
High Yields ◽  
Naphthol Derivatives ◽  
Very High

The present work focused on developing a new protocol of the 1-(benzothiazolylamino) methyl-2-naphthol derivatives synthesis by condensation of three compounds, i.e. aromatic 2-naphthol, 2-aminobenzothiazole and aldehyde. Furthermore, this reaction was carried out in the presence of three heterogeneous phosphate catalysts: monoammonium phosphates (MAP), diammonium phosphate (DAP), and trisuperphosphate (TSP). Moreover, this method offered many advantages, such as: very high yields, shorter reaction times, and the catalysts, can be easily recovered and reused without any loss of their catalytic activities.  Copyright ©2019 BCREC Group. All rights reserved 

scholarly journals Influence of Various Phosphate Fertilizers on Yields of Red Spanish Pineapples in Puerto Rico

1969 ◽  
Vol 47 (4) ◽  
pp. 242-245
Author(s):  
George Samuels ◽  
Héctor Gandía-Díaz
Keyword(s):  
Puerto Rico ◽  
Rock Phosphate ◽  
Calcium Pyrophosphate ◽  
Total Weight ◽  
Diammonium Phosphate ◽  
Triple Superphosphate ◽  
Phosphate Fertilizers ◽  
Ratoon Crop ◽  
Sandy Clay ◽  
Phosphate Treatment

A Bayamón sandy clay was used to evaluate various phosphate sources for fertilizing Red Spanish pineapples. The phosphate sources utilized were simple superphosphate, triple superphosphate, raw-rock phosphate, ammonium metaphosphate, diammonium phosphate, calcium metaphosphate, dicalcium metaphosphate, potassium calcium pyrophosphate, and potassium metaphosphate. The results on a plant and a ratoon crop indicated that: 1. There were no significant increases in yield of Red Spanish pineapple for any of the phosphate sources used as compared to the no-phosphate treatment. 2. Yields were significantly lowered over the no-phosphate treatment when diammonium phosphate (20-52-0) was used as a source of phosphate. 3. Mean weight, but not total weight of fruit per acre, was significantly reduced over the no-phosphate treatment when potassium metaphosphate (0-47-28) was used as a source of phosphate.

scholarly journals Effects of physicochemical properties of different substrates on characters and yield of maize

2018 ◽  
pp. 851
Author(s):  
Wei Yang
Keyword(s):  
Controlled Release ◽  
Influence Factor ◽  
Organic Fertilizer ◽  
Maize Yield ◽  
Organic Manure ◽  
Potassium Sulfate ◽  
Diammonium Phosphate ◽  
Chicken Manure ◽  
Controlled Release Fertilizer ◽  
Combined Application

A reasonable method was used to analyze the effects of different substrates on the characters and yield of maize, and to improve the quality and yield of maize. The effects of the maize characters and yield of national Fluvo-aquic soil fertility and fertilizer efficiency monitoring base were analyzed from 6 aspects: fertilization and combined application, fertilization and density coupling, controlled release fertilizer (CRF), fertilization level, fertilization depth and proportion, and the amount of organic manure (chicken manure). Data processing is done by using Excel2003 and SPSS17.0 software, and multiple comparisons are made by using Duncan’s new multiple range test method. The experiment of the influence factor of fertilization and combined application shows that the combination of NPK+ organic fertilizer (constant and high) can increase maize character ratio and NPK+ high-amount organic manure can increase maize yield. The experiment of the influence factor of fertilization and density coupling shows that the maize characters reached the optimum under the condition of high fertilizer. The yield of maize is highest when the density is 60000 plants /hm2 and the amount of fertilizer is 10.71kg, 3.57kg and 8.93kg per 667m2. The experiment of the influence factor of controlled release fertilizer shows that the characters of CRF V and CRF VI are the best. The control time of CRF III, CRF V, CRF VI, and CRF IV compound fertilizer is long, which can increase maize yield. The experiment of the influence factor of fertilizer level shows that the best character of maize is achieved by using the controlled release fertilizer of Agricultural University 450 kg/hm2 and two-topdressing 600 kg/hm2. In the process of corn production, the use of A-40 treatment (Volfertile controlled release fertilizer 600kg/hm2) and the one-time application of base fertilizer can increase the yield of maize. The experiment of the influence factor of fertilization depth and proportion show that the best combination is that seed fertilizer 20% urea, 40% diammonium phosphate and potassium sulfate were applied under the surface of 8cm and base fertilizer 40% urea, 60% diammonium phosphate and potassium sulfate were applied under the surface of 16cm. It can improve the character and yield of maize at the same time. The experiment of the influence factor of organic manure (chicken manure) shows that the amount of organic fertilizer (chicken manure) 26923kg per hectare with fertilizing 35kg per plot is the best amount of fertilizer, and the yield of maize increases. The proposed method can comprehensively and accurately analyze the effects of different substrates on the character and yield of maize, which can promote rational fertilization in maize and improve the quality and yield of maize steadily.

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