Development of polycaprolactone based controlled release fertilizer for mung bean crop

Pulses are a major source of protein, rich in vital elements supplying a substantial part of the calorie and nutrients. To ensure wholesome gram cultivation, nutrients are supplied to the soil for plant uptake. However, excessive release of nutrients leads to several environmental issues like deplet...

Full description

Bibliographic Details
Main Author: Pakalapati, Harshini
Format: Thesis
Language:English
Published: 2019
Subjects:
Online Access:http://eprints.nottingham.ac.uk/57018/
https://eprints.nottingham.ac.uk/57018/1/Harshini%20Pakalapati%20-%2018017644.pdf
id ftunottingham:oai:eprints.nottingham.ac.uk:57018
record_format openpolar
spelling ftunottingham:oai:eprints.nottingham.ac.uk:57018 2023-09-05T13:13:47+02:00 Development of polycaprolactone based controlled release fertilizer for mung bean crop Pakalapati, Harshini 2019-07-28 application/pdf http://eprints.nottingham.ac.uk/57018/ https://eprints.nottingham.ac.uk/57018/1/Harshini%20Pakalapati%20-%2018017644.pdf en eng https://eprints.nottingham.ac.uk/57018/1/Harshini%20Pakalapati%20-%2018017644.pdf Pakalapati, Harshini (2019) Development of polycaprolactone based controlled release fertilizer for mung bean crop. PhD thesis, University of Nottingham. Thesis (University of Nottingham only) NonPeerReviewed 2019 ftunottingham 2023-08-14T17:46:02Z Pulses are a major source of protein, rich in vital elements supplying a substantial part of the calorie and nutrients. To ensure wholesome gram cultivation, nutrients are supplied to the soil for plant uptake. However, excessive release of nutrients leads to several environmental issues like depletion of soil quality, biological imbalance in water bodies and climate change. Thus, proper nutrient management is essential for a healthy crop in terms of both quality and quantity. This can be achieved through control release of nutrients by encapsulating the fertilizers within polymers. Therefore, this work focuses on the supply of essential nutrients to mung bean crop encapsulated within biodegradable polymers. Further, the effect of biochar dozed along with encapsulated system is investigated. In this current research, initially the pot trials were carried out formulating with different levels of biochar and nutrients, results showed improved growth characteristics and crop yield when biochar of 20kg/ha and NPK of 30kg/ha was applied. Later, polycaprolactone (PCL) was synthesised using Candida antarctica lipase B (CALB) as catalyst, using design of experiments (DOE). Optimised parameters are found to be - time - 1hr, RPM - 500 rpm, temperature - 75°C and monomer/solvent ratio to 1:2, therefore successfully implementing D optimal design from DOE for optimisation of process parameters for PCL synthesis. Further, PCL was targeted to develop controlled release fertilizer (CRF) due to its biodegradability and non- toxic nature. Subsequently, two different techniques have been used to prepare control release fertilizers – solvent casting and blending techniques. When analysed with nutrient release properties and their effect on mung bean growth, blending technique is considered to be better. Since blending is easy to handle involving no solvent and potential scalable technique to prepare PCL based CRF blends. Out of the three-concentration used, 25% (i.e. blend with PCL/starch ratio is 5:1) was recorded to be less ... Thesis Antarc* Antarctica The University of Nottingham: Nottingham ePrints
institution Open Polar
collection The University of Nottingham: Nottingham ePrints
op_collection_id ftunottingham
language English
description Pulses are a major source of protein, rich in vital elements supplying a substantial part of the calorie and nutrients. To ensure wholesome gram cultivation, nutrients are supplied to the soil for plant uptake. However, excessive release of nutrients leads to several environmental issues like depletion of soil quality, biological imbalance in water bodies and climate change. Thus, proper nutrient management is essential for a healthy crop in terms of both quality and quantity. This can be achieved through control release of nutrients by encapsulating the fertilizers within polymers. Therefore, this work focuses on the supply of essential nutrients to mung bean crop encapsulated within biodegradable polymers. Further, the effect of biochar dozed along with encapsulated system is investigated. In this current research, initially the pot trials were carried out formulating with different levels of biochar and nutrients, results showed improved growth characteristics and crop yield when biochar of 20kg/ha and NPK of 30kg/ha was applied. Later, polycaprolactone (PCL) was synthesised using Candida antarctica lipase B (CALB) as catalyst, using design of experiments (DOE). Optimised parameters are found to be - time - 1hr, RPM - 500 rpm, temperature - 75°C and monomer/solvent ratio to 1:2, therefore successfully implementing D optimal design from DOE for optimisation of process parameters for PCL synthesis. Further, PCL was targeted to develop controlled release fertilizer (CRF) due to its biodegradability and non- toxic nature. Subsequently, two different techniques have been used to prepare control release fertilizers – solvent casting and blending techniques. When analysed with nutrient release properties and their effect on mung bean growth, blending technique is considered to be better. Since blending is easy to handle involving no solvent and potential scalable technique to prepare PCL based CRF blends. Out of the three-concentration used, 25% (i.e. blend with PCL/starch ratio is 5:1) was recorded to be less ...
format Thesis
author Pakalapati, Harshini
spellingShingle Pakalapati, Harshini
Development of polycaprolactone based controlled release fertilizer for mung bean crop
author_facet Pakalapati, Harshini
author_sort Pakalapati, Harshini
title Development of polycaprolactone based controlled release fertilizer for mung bean crop
title_short Development of polycaprolactone based controlled release fertilizer for mung bean crop
title_full Development of polycaprolactone based controlled release fertilizer for mung bean crop
title_fullStr Development of polycaprolactone based controlled release fertilizer for mung bean crop
title_full_unstemmed Development of polycaprolactone based controlled release fertilizer for mung bean crop
title_sort development of polycaprolactone based controlled release fertilizer for mung bean crop
publishDate 2019
url http://eprints.nottingham.ac.uk/57018/
https://eprints.nottingham.ac.uk/57018/1/Harshini%20Pakalapati%20-%2018017644.pdf
genre Antarc*
Antarctica
genre_facet Antarc*
Antarctica
op_relation https://eprints.nottingham.ac.uk/57018/1/Harshini%20Pakalapati%20-%2018017644.pdf
Pakalapati, Harshini (2019) Development of polycaprolactone based controlled release fertilizer for mung bean crop. PhD thesis, University of Nottingham.
_version_ 1776204943686893568