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Effect of microsymbionts on forest tree seedlings under different moisture regimes and salinity levels

KrishiKosh

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Title Effect of microsymbionts on forest tree seedlings under different moisture regimes and salinity levels
 
Creator Shedage, Swati Mahipati
 
Contributor Patil, N.S.
 
Subject vegetative propagation, planting, irrigation, application methods, biological development, research methods, drying, nutrients, biological phenomena, byproducts
 
Description Greenhouse experiment was conducted to find out suitable Microsymbionts inoculation to reduce the effect of salt and water stress at seedling stages of Teak and Eucalyptus. Investigation carried out in green house of ASPEE College of Horticulture and Fore str y, Navsari Agricultural University, Navsari (Gujarat) during 2011 - 2012 and 2012 - 2013 in two trials. The experiment was laid out
in Completely Randomized Design with Factorial Concept (FCRD) with thirty six treatment ombinations and three replications each inboth the species .
One month old seedlings of Eucalyptus and stump of Teak planted in p olythene bags filled with soil having different salinity levels. The bulk surface soil samples having neutral value i.e (< 4
ECe) collected from the Instructional Farm ASPEE College of Horticulture and Forestr y, Navsari Agricultural University and high salinity level soils i. e 4 - 8 ECe and 8 - 12 ECe were collected from the
Danti farm of Navsari Agricultural University, Navsari and was processed to pass through 2 mm sieve. After planting the seedlings were exposed to three levels of water stress regimes as watering the seedlings at 2, 4 and 6 days interval. The observations on survival and growth (recorded at 4 months interval), biomass (at the end of the experiment), nutrient status of different parts of seedling (at the end of the experiment) and availability of soil nutrients (initial and final) were recor ded during the course of investigation under study f or two years.
In case of Teak significantly higher survival percent, growth parameters (shoot length, number of leaves, leaf area, collar diameter) root colonization, biomass (shoot and root fresh and dry weight), nutrient content (N, P, K, S, Ca, Mg, Na, Fe, Zn, Mn, Cu ) and chlorophyll content in different plant parts (leaves stem and roots) and some of the soil chemical properties (pH, ECe and O.C), physical properties (water stable aggregates wit h 1 mm) and available nutrients (N, P, K, S, Ca, Mg, Na, Fe, Zn, Mn and Cu) were recorded in treatment where triple combination o f Microsymbionts
(M 3 ) ( Azotobacter +Azo spirillum + VAM) was inoculated under normal salinity (S 1 ) and regular watering (W 1 ) condition. Whereas in case of Eucalyptus all the growth parameters, biomass and some macronutrients in seedlings (N, P and K) recorded significantly higher in dual inoculation of zospirillum +VAM (M 2 ) under normal soil (S ) with regular watering (W ) treatment. Whereas other nutrients (Ca, Mg, Na and micronutrients) chlorophyll content, root colonization, survival percent and soil available nutrients were recorded higher in triple inoculation with normal soil salinity and
normal watering treatments.
Besides this primar y results other facts observed during the experiment was that all the Microsymbionts inoculated treatment performed better even under the highly saline (S 2 and S
3 ) and water stress (W 2 and W 3 ) condition especially triple inoculated treatment . Among the two species under investigation Teak was observed to be less tolerant to salinity and water stress compar e to Eucalyptus.
 
Date 2016-05-20T07:39:03Z
2016-05-20T07:39:03Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/66146
 
Language en
 
Format application/pdf
 
Publisher NAU