STUDIES ON MICRO SPRINKLER FERTIGATION IN GROUNDNUT (Arachis hypogaea L.)
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Date
2015-07-10
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
A field experiment was conducted during Kharif 2014 at ZARS,
University of Agricultural Sciences, Bengaluru to study the effect of micro
sprinkler fertigation on growth, yield, water use efficiency (WUE), nutrient use
efficiency (NUE) and economics of groundnut in red sandy loam soil. The
experiment was laid out in RCBD with nine treatments and replicated thrice.
Micro sprinkler fertigation of WSF at 100 % RDF increased the pod yield
significantly (2882 kg ha-1) over all other treatments. However, it was on par with
micro sprinkler fertigation of WSF at 75 % RDF. Among the micro sprinkler
fertigation treatments significant yield reduction was noticed with micro sprinkler
fertigation of normal fertilizers (NF) at 50 % recommended dose. Micro sprinkler
fertigation of WSF at 100 % RDF recorded significantly higher number of pods
plant-1 (34.2) and WUE (64.9 kg ha-cm-1) compared to surface irrigation. Micro
sprinkler fertigation of WSF at 75 % RDF recorded significantly higher
agronomic nutrient use efficiency (70.3, 22.3 and 44.6 kg kg-1 of N, P and K,
respectively). Micro sprinkler irrigation saved 29.8 % water over surface
irrigation. Micro sprinkler fertigation of NF at 100 % RDF recorded higher B:C
ratio (2.82) followed by micro sprinkler fertigation of NF at 75 % RDF (2.64).
July,
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