Response of organic sources of nutrients in blackgram
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Date
2022-08-24
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palampur
Abstract
A field experiment was conducted at Model Organic Farm, Department of
Organic Agriculture and Natural Farming, CSK Himachal Pradesh Krishi
Vishvavidyalaya during the Kharif season of 2021, to evaluate the effect of organic
sources of nutrient on growth and yield of blackgram. The experiment was laid out in
randomized block design comprising of eight treatments [T1 − Bijamrita + Jiwamrita
(5%, 10%, 10%, and 10%, respectively at time of sowing, 21, 42 & 63 DAS) +
Mulching (10 t/ha), T2 – Bijamrita + Ghanajiwamrita (250 kg/ha) + Mulching (10
t/ha), T3 − Bijamrita + Jiwamrita (5%, 10%, 10%, and 10%, respectively at time of
sowing, 21, 42 & 63 DAS) + Ghanajiwamrita (250 kg/ha) + Mulching (10 t/ha), T4 −
Farm yard manure (10 t/ha), T5 − Farm yard manure (10 t/ha) + Ghanajiwamrita
(250 kg/ha), T6 − Biofertilizers (Rhizobium + PSB) + Farm yard manure (10 t/ha) +
Vermiwash at 15, 30 & 45 DAS (1:10), T7 − Biofertilizers (Rhizobium + PSB) +
Vermicompost (7.5 t/ha) + Vermiwash at 15, 30 & 45 DAS (1:10), T8 − Absolute
control]. Experimental site was silty clay loam in texture and acidic in reaction.
Available nitrogen, phosphorus and potassium content were medium. The highest
values of plant height, dry matter accumulation, unit area efficiency, absolute growth
rate, yield attributes, seed yield, gross and net returns were recorded in T7
(Biofertilizers + Vermicompost + Vermiwash) whereas the highest benefit cost ratio
was recorded in T6 (Biofertilizers + Farm yard manure + Vermiwash). The lowest
values of the above said parameters were noted in T8 (absolute control) except net
returns and benefit cost ratio which were the lowest in T1 (Bijamrita + Jiwamrita +
Mulching). T7 (biofertilizers + vermicompost + vermiwash) proved to be the best
treatment while T6 (Biofertilizers + FYM + Vermiwash) and T5 (FYM +
Ghanajiwamrita) proved to be the second and third best treatment in enhancing
productivity and profitability of blackgram, respectively.