Seed production performance of different soybean (Glycine max L.) varieties under varying row spacing
2019
Gauna, G.B.
A study was conducted at the BPI-LBNCRDC [Bureau of Plant Industry -Los Baños National Crop Research and Development Center], Los Baños, Laguna [Philippines] to compare different grain soybean (Glycine max L.) varieties on their agronomic and seed production performance under different row spacing and to identify which among the varieties have average adaptability in terms of seed yield to row spacing. BPI Sy4 and NSIC SY9 were planted at row spacing of 30, 45, and 60 cm. The quantitative traits used to evaluate the grain soybean varieties include days to 50% flowering, plant height, number of pods per plant, number of seeds per pod, pod length, number of secondary branches, leaf area index, seed weight, and seed yield. Results of the study revealed the following: NSIC Sy9 produced flowers early and taller in height as compared to BPI Sy4. Longer pods were exhibited by BPI Sy4 at a row spacing of 45 cm. There were no significant effect of varieties and row spacing on the number of branches, seeds/pod and 1,000 seed weight. The variety NSIC Sy9 produced more pods per plant than BPU Sy4. At 30 cm row spacing, both BPI Sy4 and NSIC Sy9 have statistically significant leaf area indices. With closer row spacing (30 cm), the highest grain yield was obtained from both BPI Sy4 and NSIC Sy9.
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