خط مشی دسترسیدرباره ماپشتیبانی آنلاین
ثبت نامثبت نام
راهنماراهنما
فارسی
ورودورود
صفحه اصلیصفحه اصلی
جستجوی مدارک
تمام متن
منابع دیجیتالی
رکورد قبلیرکورد بعدی
Document Type:Latin Dissertation
Language of Document:English
Record Number:54490
Doc. No:TL24444
Call number:‭MR30616‬
Main Entry:Kimberley D. Schneider
Title & Author:Phosphate rock solubilization by Aspergillus niger : Investigating citric acid production and mineral dissolutionKimberley D. Schneider
College:University of Guelph (Canada)
Date:2007
Degree:M.Sc.
student score:2007
Page No:193
Abstract:Phosphorus deficiencies are limiting crop production in agricultural soils worldwide. Locally available sources of phosphate rock (PR) are being recognized for their potential role in soil fertility improvement. For applications of PR to be effective, the phosphorus must be made plant-available. Modification with acid-producing microorganisms has the potential to increase the agronomic effectivenss of PR. For this thesis, four strains of Aspergillus niger were screened for phosphate solubilization and acid production. Response surface methodology was used to optimize medium conditions for citric acid production. Lastly, PR solubilization from additions of PR to an A. niger ATCC 9142 culture medium at cultivation onset, was compared with additions of PR to the acid-containing culture supernatant. The two treatments were found to solubilize equivalent PR, with solution P values ranging from 219-382 mg/l. Future research is necessary to optimize this process and to investigate the effects of such phosphorus mobilization on plant growth.
Subject:Earth sciences; Biogeochemistry; 0425:Biogeochemistry
Added Entry:University of Guelph (Canada)