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( Aritra Roy Choudhury ),( Mak Chanratana ),( Shamim Ahmed ),( Md Abdul Halim ),사동민 ( Tongmin Sa ) 한국환경농학회 2017 한국환경농학회 학술대회집 Vol.2017 No.-
The formulation of plant growth promoting bacteria as a potential bioinoculant to combat against various biotic and abiotic stresses have been shown to be beneficial for both plants and environment. The industrial application and market value of bioinoculants compared to conventional fertilizers are not high. The major limitations are low quality and the lack of applicable formulation for bioinoculants. These bioinoculants need proper carrier materials for delivery into the agricultural lands for their enhanced functionality, survivability and increase in their shelf life during storage. This study was conducted to compare the plant growth promoting effects of immobilized M. oryzae CBMB20 in chitosan and alginate beads on tomato plant under greenhouse conditions. The immobilized M. oryzae CBMB20 in various formulations were c ted in tomato (Solanum lycopersicum) seeds using 1% (w/v) carboxymethyl cellulose as an adhesive. Various physiological properties of plants such as plant length, dry weight of root and shoot, etc were measured after 15 days of transplanting. The survivability of M. oryzae CBMB20 and degradation of carrier material in soil was checked in regular intervals during the growing stage of tomato plant. The application of chitosan immobilized M. oryzae CBMB20 indicated up to 1.3 fold increase in the shoot and root lengths as well as plant dry weight of tomato plant under greenhouse condition compared to other treatments. The chitosan treated tomato seeds showed significant increase in germination percentage and chlorophyll content. Immobilized M. oryzae CBMB20 showed 1.5 fold higher survivability in tomato rhizosphere soil compared to free cells with around 4.35 log CFU g<sup>-1</sup> of soil for chitosan at 21 DAS. The alginate beads got fully degraded whereas there was partial degradation of chitosan beads after 30 days. Chitosan was able to keep a considerable survivability of M. oryzae CBMB20 for over 20 days. These observations confer that chitosan is more suitable carrier material for immobilizing M. oryzae CBMB20. Furthermore, such formulation holds good promise to be utilized with other PGPB strains and crops for potential large scale application in agricultural fields.
Aritra Ganguly,Ramen Kanti De 대한설비공학회 2019 International Journal Of Air-Conditioning and Refr Vol.27 No.2
In this paper, an attempt has been made to propose a multi-commodity cold storage to store a variety of high value perishable commodities round the year. To maintain the favorable micro-climate inside the cold storage space for the selected commodities, a cooling system based on double-effect vapor absorption cycle has been developed. To meet the year-round thermal and electrical load of the proposed cold storage, a solar thermal-PV-based hybrid power system has been designed. A computer program in MATLAB-R2017a has been developed to predict the year-round performance of the proposed system for a complete calendar year for the climatic condition of Kolkata, India (22.57∘N, 88.36∘E). An exergy analysis of the proposed system has also been included in the study. Finally, a life cycle cost analysis of the integrated solar hybrid power system has been performed to estimate its payback period. The study reveals that the mutual generation from 45 numbers of parabolic trough collectors along with 225 numbers of SPV modules is sufficient to meet the year-round energy demand of the proposed cold storage. The study thus reinforces the need and viability of double-effect VAR system-based multi-commodity cold storage powered through solar energy for developing countries like India, where significant amount of agricultural production gets wasted due to inadequate warehousing facilities