scholarly journals Preparation and nutrient release kinetics of enriched biochar-based NPK fertilizers and agronomic effectiveness in direct seeded rice

2021 ◽  
Author(s):  
Arkaprava Roy ◽  
Sumit Chaturvedi ◽  
Suhita Pyne ◽  
Shiv Vendra Singh ◽  
Govindaraju Kasivelu
Keyword(s):  
Humic Acid ◽  
Release Kinetics ◽  
Nutrient Release ◽  
Agronomic Effectiveness ◽  
Npk Fertilizers ◽  
Cumulative Release ◽  
Field Response ◽  
Direct Seeded ◽  
Use Efficiency ◽  
Kinetics Of

Abstract In present study, two enriched biochar-based fertilizers were prepared having fertilizer grade of 6-6-4 N-P2O5-K2O by intercalation of NPK fertilizers mixture solution as EB-1 and additional humic acid and seaweed extract as EB-2. In laboratory, batch experiment were done to compare nutrients (NH4+, NO3−, P and K+) release patterns of developed fertilizers along with conventional fertilizers. Enriched biochar fertilizers (EB) demonstrated much slower release pattern of NH4+, P and K+, however NO3− release was similar over conventional fertilizers. The cumulative release of N in EB fertilizers was similar to conventional fertilizer, however significantly less of P and K were released during the period of 72 hrs. The field response study of enriched fertilizers EB-2 revealed 29.5, 11.5 and 22.9% higher apparent use efficiency than conventional fertilizer. The slow nutrients release behaviour of EB fertilizers implies reduced losses and enhanced NUE as reflected by higher apparent recovery of N, P and K.

scholarly journals ​Nutrient Release Pattern of a Fortified Manure Disc and its Implication on Yield of Tomato in Sandy Soils

2021 ◽  
Author(s):  
V. Mini ◽  
G. Suja
Keyword(s):  
Rice Husk ◽  
Nutrient Use Efficiency ◽  
Nutrient Release ◽  
Sandy Soils ◽  
Waste Materials ◽  
Npk Fertilizers ◽  
Organic Manures ◽  
Nutrient Use ◽  
Use Efficiency ◽  
Organic Formulations

Background: Development of fortified organic formulations using various organic sources and fertilizers for soil application will ensure efficient nutrient management in homestead vegetable production systems. Fortified organic formulations will help in preventing nutrient leaching also. Hence, the present study has been undertaken during 2019-20 to develop low cost fortified organic manure discs using various biodegradable agro waste materials and NPK fertilizers and to study its effect on growth and yield of tomato in sandy soils of Kerala. Methods: A fortified manure disc was developed by combining local biodegradable agro waste materials with conventional NPK fertilizers. Organic manures like rice husk ash, cow dung, rice husk, coirpith compost, vermicompost, neem cake and clay were used to develop the manure disc. The combination of organic manures was fortified with fertilizers at various proportions of manure: fertilizer viz., 1:1, 2:1, 0.5:1 and manure alone and used for incubation for a period of two months to study the nutrient release pattern of N, P and K.The 2:1(manure: fertilizer) formulation was selected based on the highest peak of nutrient availability of N, P and K even after 2 months. Effect of fortified manure disc was evaluated by using tomato variety Anagha as test crop in a pot culture experiment. Result: Growth, yield and quality of tomato increased significantly due to the application of fortified manure disc. The highest yield per plant of 0.97 kg was recorded for T8 (50% recommended dose fortified manure disc in 2 splits) and lowest yield was recorded for T9 (Manure alone). The fortified manure disc had a significant influence on nutrient use efficiency also. The highest NUE of 45.5% was recorded in treatment T8 (50% fertilizer fortified discs in 2 splits). Study revealed that fortified manure disc is a promising technology to reduce nutrient leaching and enhancing the nutrient use efficiency in sandy soils. Fifty percentage reduction in the recommended dose of NPK fertilizers were achieved by fortifying the manure disc with fertilizers.Thus the cost of fertilizers and fertilizer load per unit area can be reduced by the application of fortified manure disc which will act as slow release fertilizer.

Analysis of K+ release kinetics of biomass ash with different pH

2014 ◽  
Vol 22 (2) ◽  
pp. 171-176
Author(s):  
Kan WANG ◽  
Zifang WANG ◽  
Ming GAO ◽  
Yaohua HUANG ◽  
Xiaofei HAN ◽  
...  
Keyword(s):  
Release Kinetics ◽  
Biomass Ash ◽  
Kinetics Of ◽  
K Release

scholarly journals Design and release kinetics of liposomes containing abiraterone acetate for treatment of prostate cancer

2021 ◽  
Vol 2 ◽  
pp. 100077
Author(s):  
Sudipta Das ◽  
Arnab Samanta ◽  
Shouvik Mondal ◽  
Debatri Roy ◽  
Amit Kumar Nayak
Keyword(s):  
Prostate Cancer ◽  
Release Kinetics ◽  
Abiraterone Acetate ◽  
Kinetics Of

scholarly journals Risk Assessment of Agricultural Plastic Films Based on Release Kinetics of Phthalate Acid Esters

2021 ◽  
Vol 55 (6) ◽  
pp. 3676-3685
Author(s):  
Yu Wang ◽  
Fang Wang ◽  
Leilei Xiang ◽  
Chenggang Gu ◽  
Marc Redmile-Gordon ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Release Kinetics ◽  
Plastic Films ◽  
Kinetics Of ◽  
Acid Esters ◽  
Phthalate Acid Esters

scholarly journals Degradation Kinetics of Humic acid in Aqueous Solution by Ozonation Treatment under Different Parameter Conditions

2020 ◽  
Vol 596 ◽  
pp. 012010
Author(s):  
Zafirah Mahyun ◽  
Noor Fazliani Shoparwe ◽  
Ahmad Zuhairi Abdullah ◽  
Abdul Latif Ahmad ◽  
Mardawani Mohamad ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Humic Acid ◽  
Degradation Kinetics ◽  
Kinetics Of

scholarly journals Halloysite nanotubes filled with salicylic acid and sodium diclofenac: effects of vacuum pumping on loading and release properties

2021 ◽  
Author(s):  
Lorenzo Lisuzzo ◽  
Giuseppe Cavallaro ◽  
Stefana Milioto ◽  
Giuseppe Lazzara
Keyword(s):  
Salicylic Acid ◽  
Release Kinetics ◽  
Halloysite Nanotubes ◽  
Drug Molecules ◽  
Sodium Diclofenac ◽  
Tunable Release ◽  
Feature Based ◽  
Kinetics Of ◽  
Filling Mechanism

AbstractIn this work, we investigated the effects of the vacuum pumping on both the loading efficiencies and the release kinetics of halloysite nanotubes filled with drug molecules dissolved in ethanol. As model drugs, salicylic acid and sodium diclofenac were selected. For comparison, the loading of the drug molecules was conducted on platy kaolinite to explore the key role of the hollow tubular morphology on the filling mechanism of halloysite. The effects of the pressure conditions used in the loading protocol were interpreted and discussed on the basis of the thermodynamic results provided by Knudsen thermogravimetry, which demonstrated the ethanol confinement inside the halloysite cavity. Several techniques (TEM, FTIR spectroscopy, DLS and $$\zeta$$ ζ -potential experiments) were employed to characterize the drug filled nanoclays. Besides, release kinetics of the drugs were studied and interpreted according to the loading mechanism. This work represents a further step for the development of nanotubular carriers with tunable release feature based on the loading protocol and drug localization into the carrier. Graphic abstract The filling efficiency of halloysite nanotubes is enhanced by the reduction of the pressure conditions used in the loading protocol.

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