EVALUATION OF QUALITY AND PERFORMANCE OF LIQUID AND CARRIER BASED BIOFERTILIZERS
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Date
2014
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ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD
Abstract
The experiment was conducted during 2013-14 at college farm, Department of
Agricultural Microbiology and Bioenergy, and Department of Soil Science & Agricultural
Chemistry, College of Agriculture, Rajendranagar, ANGRAU, Hyderabad.
Different carrier and liquid based biofertilizers were brought from different firms
for evaluation of their quality. In case of carrier based biofertilizers, population of
beneficial bacteria, pH, consistency, moisture content, level of contaminants were
estimated. In case of liquid biofertilizers, population of beneficial bacteria, pH, presence of
contaminants were estimated. The shelf life and purity of liquid biofertilizers were tested
using suitable media for viable count. Microbial population of beneficial bacteria was
monitored in liquid and carrier based biofertilizers at monthly intervals.
Liquid based biofertilizers were having more shelf life than carrier based
biofertilizers. Microbial count in LBF was constant over a long period than CBF. In CBF,
the microbial count was decreasing at a fast rate. Quality parameters of LBF are good and
constant for 8 months as per the experiment. In CBF, the quality was too low and the
moisture content is too high.
The field experiment was conducted following randomized block design with 11
treatments and three replications. Treatments consisted of T1: 100 % RDF, T2: 75 % RDF
+ carrier based biofertilizers (seed treatment), T3: 75 % RDF + carrier based biofertilizers
(soil application), T4: 75 % RDF + carrier based biofertilizers (soil application + FYM), T5:
75 % RDF + liquid based biofertilizers (seed treatment), T6: 75 % RDF + liquid based
biofertilizers (soil application), T7: 75 % RDF + liquid based biofertilizers (soil application
+ FYM), T8: carrier based biofertilizers (seed treatment at sowing and soil application after
6 weeks), T9: carrier based biofertilizers (soil application at sowing and after 6 weeks), T10:
liquid based biofertilizers (soil application at sowing and after 6 weeks), T11: liquid based
biofertilizers (seed treatment at sowing and soil application after 6 weeks). The growth
parameters viz., plant height, root length, nodule no. plant-1, nodule dry weight (g plant-1),
dry matter accumulation (g plant-1), were recorded at different crop growth stages. Likewise
observation on yield attributes viz., number of seeds pod-1, weight of 100 seeds, seed yield
were taken at harvest and nutrient uptake was estimated at harvest stage. Also available soil
nitrogen, phosphorus and potassium and microbial population were recorded at initial,
flowering and harvest stage.
Application of carrier and liquid based biofertilizers in soybean showed best result
for the treatment T7 (75 % RDF + Liquid based biofertilizers soil application with FYM).
The treatment recorded maximum yield, number of seed per pod-1 and 100 seed weight than
all other treatments. Treatment receiving only liquid based biofertilizers and carrier based
biofertilizers with FYM was on par with the treatment T7.
Highest nitrogen, phosphorus and potassium uptake and higher available nitrogen,
phosphorus, potassium in the soil were observed in the treatment receiving 75 % RDF +
Liquid based biofertilizers soil application with FYM which was significantly higher than
the treatments of only seed treatment or only soil application. At harvest, treatment T7 (75
% RDF + Liquid based biofertilizers soil application with FYM) recorded significantly
higher bacterial, fungal, actinomycetes, Rhizobium and Pseudomonas population as
compared to the other treatments. The significantly lowest bacterial, fungal, actinomycetes,
Rhizobium and Pseudomonas population was found in the treatment T1 (100 % RDF).
Description
Keywords
QUALITY, PERFORMANCE, LIQUID, CARRIER, BIOFERTILIZERS