EVALUATION OF LIGNITE AND POULTRY MANURE BASED HUMIN ON SOIL PROPERTIES AND CROP PRODUCTIVITY
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Date
2019-12-27
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
A green house study was carried out to evaluate the lignite (LH) and poultry
manure (PMH) based humin on soil properties and crop productivity in three different
soils (acid, neutral and alkali soil) with baby corn as test crop during 2018. A field
experiment was also conducted in acid soil consisting of ten treatments replicated thrice
in a RCBD with maize as main crop and cowpea as residue crop at KVK, Hadonahalli,
Bengaluru Rural district during 2018-19. The per cent recovery of humin was higher
from poultry manure (86.70%) than lignite manure (64.52%).The PMH recorded higher
nutrient content than the lignite humin. In green house study, the performance of both
humins was better in acid soil compared to neutral and alkali soils. At 60 days after
sowing, significantly higher fresh and dry biomass of baby corn (53.94 and 42.90 g plant-
1, respectively) were recorded with T2 (FYM @10 t ha-1) which was followed at par with
T7 (PMH @2.5 t ha-1 +FYM @7.5 t ha-1), T3 (LH @2.5 t ha-1 +FYM @7.5 t ha-1) and T8
(PMH @5 t ha-1 +FYM @5 t ha-1). In all treatments 100% RDF was commonly applied
except control plot. In field experiment, significantly higher maize kernel (8070 kg ha-1),
stover (9948 kg ha-1) and nutrient uptake was recorded with T2 and it was followed at par
with T7, T3 and T8. Similar effect was recorded in cowpea residue crop. There was
significant increase in available nutrient status in post harvest soils. Hence, it can be
concluded that humin manures of poultry manure and lignite can be effectively utilized as
alternative source of organic manure to the tune of 5 and 2.5 t ha-1, respectively without
any detrimental effect on crop productivity and also on soil health especially for acid and
neutral soils.