Growth, nutrient uptake and quality of soybean [Glycine max (L.) Merrill] as influenced by genotypes and seed rates
DOI:
https://doi.org/10.59797/ija.v70.i3.5631Keywords:
Genotypes, Growth attributes, Nutrient uptake, Seed rates, QualityAbstract
A field experiment was conducted to study the effect of genotypes and seed rates on growth, nutrient uptake and quality of soybean during kharif 2023 at Punjab Agricultural University, Ludhiana, Punjab. Twelve treatment combinations comprising three soybean genotypes (NRCSL 3, NRCSL 5 and SL 958) and four seed rates (50.0, 62.5, 75.0 and 87.5 kg/ha) were laid out in a completely randomized block design (CRBD) with four replications. Results revealed that, the soybean genotype SL 958 exhibited highest plant stand, days taken to full flower and maturity, total nutrient uptake (305.0-45.2-135.5 kg N-P-K/ha), protein content (42%) and protein yield (1312 kg/ ha). Genotype NRCSL 5 recorded significantly higher leaf area index, PAR interception, dry matter accumulation and seed thickness, while genotype NRCSL 3 had significantly higher oil content than the other genotypes. Seed rate of 50.0 kg/ha resulted in significantly higher dry matter accumulation (25.17 g/plant), whereas the 87.5 kg/ha seed rate led to significantly higher plant stand, leaf area index (6.6) and PAR interception (94.3%) than the other seed rates. Seed rate had no significant impact on seed thickness, total nutrient uptake or quality parameters (protein content, protein yield, oil content and oil yield). In conclusion, the genotype NRCSL 5 was found promising in terms of growth attributes (leaf area index, PAR interception and dry matter accumulation) and was early in flowering and maturity, while genotype SL 958 showed better nutrient uptake and quality at a moderate seed rate (62.5–75.0 kg/ha).
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