IMPROVEMENT OF YIELD AND SEED QUALITY OF SOYBEAN THROUGH INTEGRATED NUTRIENT MANAGEMENT

Abstract

The experiment was conducted during October 2019 to April 2020 to improve yield and seed quality of soybean through integrated nutrient management. The variety BARI Soybean 5 was used as the test crop. In this experiment, the treatment consisted of fourteen different levels of integrated nutrient management viz. T = no chemical fertilizer, no organic manure (control), T 2 = cow dung (10 t ha -1 ), T = vermi compost (5 t ha -1 ), T 4 = recommended dose of fertilizer (RDF) ( Urea 50 kg ha 3 -1 1 ,TSP 150 kg ha , MoP 100 kg ha -1 , Gypsum 80 kg ha -1 , Boron 8 kg ha -1 ) T = trichoderma compost (2 t ha -1 ), T 6 = biochar (10 t ha -1 ), T 7 = cowdung (10 t ha -1 5 ) +50% RDF,T = cowdung(10 t ha -1 ) + 75% RDF, T 9 = vermi compost (5 t ha -1 ) + 50% RDF, T 10 8 = vermi compost (5 t ha -1 ) + 75% RDF, T 11 = trichoderma compost (2 t ha -1 ) + 50% RDF, T = trichoderma compost (2 t ha -1 ) + 75% RDF, T 13 = biochar (10 t ha -1 )+ 50% RDF, T = biochar (10 t ha -1 ) + 75% RDF. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. Different levels of integrated nutrient management showed statistically significant variation on all parameters of soybean. The tallest plant (37.3, 50.67, 52.53 and 52.93 cm at 30, 50, 70 days after sowing and at harvest, respectively) was recorded from Biochar( 10 t ha -1 )+50%RDF. The maximum number of leaves plant -1 , pod length (cm), number of pods plant -1 12 14 , number of seeds pod -1 and thousand seed weight (g) as well as the highest seed yield (1333 kg ha ), stover yield(181 kg ha -1 ), biological yield (1513 kg ha -1 ), was observed from Biochar( 10 t ha -1 )+ 50% RDF. On the other hand, the lowest seed yield (639 kg ha ) was observed from T 0 (control) treatment. The highest harvest index was recorded from T

(biochar 10 t ha -1 ) treatment . The highest germination 94.33% was obtained in T

(Biochar 10 t ha -1 + 50% RDF) treatment.. The highest germination index, coefficient of velocity, energy of emergence, shoot length, root length, vigour index, viability was recorded in T 13 (Biochar 10 t ha -1 + 50% RDF) treatment.. Therefore Biochar(10 t ha ) + 50% RDF may be possible to use in reducing inorganic fertilizer which will increase seed quality with lower production cost without significant yield reduction of soybean.