Influence of Fertilizer and Spacing on Seed Yield and Quality of
Grain Amaranth (Amaranthus hypochondriacus L.) cv. Suvarna
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Author:S. Manikandan, K. Sivasubramaniam and P. Srimathi
p-ISSN:0024-9602, e-ISSN:2582-5321, Vol:97, Issue:apr-jun
DOI: https://doi.org/10.29321/MAJ.10.100356
Abstract
A field experiment was conducted to fix the optimum dose of N, P and K fertilizers and
spacing levels for realizing higher seed yield associated with good quality characters in grain
amaranth cv. Suvarna. The effect of fertilizer at three different schedules viz., NPK @ 30:10:10;
40:20:20 and 50:30:30 kg ha-1 and three different spacing viz., 45 X 10 cm2; 45 X 15 cm2 and 45 X
20 cm2 on plant morphological characters viz., plant height, number of leaves, stem diameter,
number of spikelet spike-1, spike length, spike breadth and seed physiological characters
viz., 100 seed weight, germination, vigour index and protein content were evaluated. The
combined effect of fertilization of NPK and spacing of 45 x 15 cm2 significantly improved the
plant height, spike length and breadth. Though the seed yield per plot was lower by 17.7 per
cent than closer spacing, fore-going yield, grain amaranth could be spaced as 45 x 15 cm2 and
fertilized as 50:30:30 kg ha-1 for higher quality seed yield.
Key words : Grain amaranth, fertilizer, spacing, seed, yield, quality