Impact of planting geometry and nutrient management on growth and quality of yard long bean (Vigna unguiculata ssp. sesquipedalis)
DOI:
https://doi.org/10.48165/jefa.2026.21.1.27Keywords:
Biofertilizer, inorganic fertilizer, organic fertilizer, spacing, yard long bean.Abstract
The present study was conducted at the Experimental Farm of the Department of Horticulture at Assam Agricultural University, Jorhat during the 2022-23 period to assess the impact of different nutrient sources, which included organic and inorganic fertilizers as well as biofertilizers, on the growth and quality of yard long bean (Vigna unguiculata ssp. sesquipedalis) variety Red Ribbon. The experiment was designed in Factorial Randomized Block Design, incorporating treatments spacings S1 = 60 cm × 45 cm, and S2 = 60 cm × 30 cm, with nutrient doses T0 = Control, T1 = 15:35:20 kg NPK ha-1 + 4 t FYM ha-1; T2 = 15:35:20 kg NPK ha-1 + 2 t Vermicompost ha-1 + Biofertilizer (Rhizobium + PSB); T3 = 25:50:30 kg NPK ha-1 + 4 t FYM ha–1; and T4 = 25:50:30 kg NPK ha-1 + 2 t Vermicompost ha-1 + Biofertilizer (Rhizobium + PSB), all replicated three times. Regarding the growth parameters, the highest vine length (198.39 cm), number of branches (21.76), number of leaves per plant (87.00), number of nodes per plant (62.60), internodal length (14.66 cm), days to 50 per cent flowering initiation (35.49 days), number of days from flowering to harvesting (7.75 days), days to first picking (43.89 days), harvest duration (40.43 days), and quality parameters such as carbohydrate content (7.99%), protein content (2.97 g 100g-1), and ascorbic acid (9.37 mg 100g-1) were observed in the treatment 25:50:30 kg NPK ha-1 + 2 t Vermicompost ha-1 + Biofertilizer (Rhizobium + PSB), followed by 25:50:30 kg NPK ha-1 + 4 t FYM ha-1 maintaining spacing 60 cm x 45 cm.
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