Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810050375
Authors: Cheke, Ashwin Sakharam
Advisor: Patil, V. D.
Title: Studies on rhizosphere hybridization and nutrient dynamics in sweet orange
Publisher: Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani
Language: en
Type: Thesis
Pages: 223
Agrotags: null
Keywords: Rhizosphere, Hybridization, Nutrient, Sweet orange, Potassium
Abstract: The research entitled “Studies on rhizosphere hybridization and nutrient dynamics in sweet orange” was conducted during the year 2013-14 and 2014-15 in three phases. In the first phase, representative soil samples from rhizosphere of sacred Ficus species (Ficus racemosa L. i.e Umber tree. Ficus benghalensis L. i.e. Banyan tree and Ficus religiose L. i.e. Pipal tree) and non rhizosphere soil samples were collected and pot culture experiment was carried out to test the germination of sweet orange seeds. In the second phase, pot culture experiment was carried out with nine set of treatments (Ti Non rhizosphere soil (Non sweet orange growing orchard) (NRS), Tj Non rhizosphere soil from sweet orange orchard (NRSW), T3 Ficus religiose L.(Pipal tree) rhizosphere soil (PRS), T4 Ficus benghalensis L.(Banyan tree) rhizosphere soil (BRS), T5 Ficus racemosa L.(Umber tree) rhizosphere soil (URS), Tg Ficus religiosa L. (Pipal tree) rhizosphere soil + Sweet orange rhizosphere soil (PRS + SRS), T7 Ficus benghalensis L.(Banyan tree) rhizosphere soil + Sweet orange rhizosphere soil (BRS +SRS), Tg Ficus racemosa L.(Umber tree) rhizosphere soil + Sweet orange rhizosphere soil (URS + SRS), T9 Sweet orange rhizosphere soil (SRS)) replicated thrice to study the effect of rhizosphere soil hybridization on growth of sweet orange, soil properties, nutrient dynamics, enzymes activity, microbial diversity and microbial population. Similarly the bacterial strains /species were isolated from umber rhizosphere soil to know the microbial diversity of sacred Ficus species rhizosphere soil. In the third phase, field experiment was laid out at Zari Ta. & Dist Parbhani on important satellite treatments emerged out from pot culture experiment ie.Ti NPK + Control, T2 NPK + Pipal rhizosphere soil (PRS), T3 NPK + Banyan rhizosphere soil (BRS), T4 NPK + Umber rhizosphere soil (URS), T5 NPK + Consortia, Tg Without NPK + Consortia, T7 NPK + Dose of Azotobacter + FSB + Trichoderma. A field experiment was conducted in randomized block design with four replications, to study the effect of developed value added consortium on fruit yield and fruit quality of sweet orange. The results revealed that growth media comprising Ficus species rhizosphere soil resulted in improved seed germination and plant growth. Amongst the three species germination percentage of seeds of sweet orange was highest in Umber rhizosphere soil followed by Banyan rhizosphere soil and Pipal rhizosphere soil as compared to non- rhizosphere soil. The growth of sweet orange seedlings was improved in all the rhizosphere and rhizosphere hybridized soils over non rhizosphere and, Sweet orange rhizosphere soil. Amongst all sacred Ficus tree species Ficus racemosa L. rhizosphere soil was best followed by Banyan rhizosphere soil and Pipal rhizosphere soil. Sacred species rhizosphere soil was slightly acidic to neutral in pH, highest content of organic carbon and lowest level of lime. Further the Umber rhizosphere soil recorded maximum content of available N, P, K, S and micronutrients and of microbial population viz. Bacteria, Fungi and Actinomycetes. Eight different bacterial species were isolated from umber rhizosphere soil. These bacterial species were unique in its functions and found to have pronounce and excellent impact on soil health parameters. Which in turn reflected in the vigorous growth and rejuvenation of wilted sweet orange trees. However from non rhizosphere soil only 3 bacterial strains were isolated. Ficus racemosa L. Ficus religiosa L. and Ficus henghalensis L. were hybridized together in equal proportion and incubated for development of beneficial microbes consortia. The developed Ficus species rhizosphere soil consortia with RD of NPK showed excellent and significant impact on soil quality parameters, nutrient availability and enhanced the fruit yield and quality of fruit. It can be concluded that the Consortia developed by hybridization of Ficus racemosa L.(Umber) rhizosphere soil + Ficus henghalensis L.(Banyan) rhizosphere soil + Ficus religiosa L. (Pipal) rhizosphere soil proved its superiority in improving soil quality, increasing sweet orange yield, improvement in fruit quality and rejuvenation of wilted / semi wilted sweet orange fruit trees”. Amongst the three sacred Ficus species Ficus racemosa L. rhizosphere soil found to be superior in soil quality parameters and its application recorded significant improvement in soil properties and growth and yield parameters of sweet orange Citrus sinensis L Osbeck., followed by Ficus henghalensis L. and Ficus religiosa L. rhizosphere soil. Head, SSAC
Subject: Soil Science and Agriculture Chemistry
Theme: Agriculture
These Type: Ph.D
Issue Date: 2016-06-10
Appears in Collections:Thesis

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