Influence of nitrogen and potassium on production potential of quinoa (Chenopodium quinoa) in India

SHAIK MOBEENA; N  THAVAPRAKAASH; M  DJANAGUIRAMAN; S  GEETHANJALI; P  GEETHA

doi:10.56093/ijas.v96i5.156723

Authors

SHAIK MOBEENA Regional Agricultural Research Station (Acharya N G Ranga Agricultural University), Tirupati, Andhra Pradesh 517502, India
N THAVAPRAKAASH Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003, India
M DJANAGUIRAMAN Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003, India
S GEETHANJALI Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003, India
P GEETHA Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu 641 003, India

https://doi.org/10.56093/ijas.v96i5.156723

Keywords:

Economics, Growth, Nitrogen, Potassium, Quinoa, Yield

Abstract

A field investigation was made during the late Kharif 2022 and Rabi 2022-23 seasons at the Tamil Nadu Agricultural University, Coimbatore, to explore the best nutrient management strategies for enhancing quinoa (Chenopodium quinoa Willd.) production. The experimental field was arranged in a randomized complete block design with nine treatments, each replicated thrice. The treatments included are T₁ - 75:0 kg N: K₂O/ha, T₂ - 100:0 kg N: K₂O/ha, T₃ - 125:0 kg N: K₂O/ha, T₄ - 150:0 kg N: K₂O/ha, T₅ - 75:50 kg N: K₂O/ha, T₆ - 100:50 kg N: K₂O/ha, T₇ - 125:50 kg N: K₂O/ha, T₈ - 150:50 kg N: K₂O/ha and, were compared with the Control (T₉ - Without N and K₂O fertilizers). A 30 kg/ha of phosphorus (P₂O₅) was commonly applied as basal for all treatments. The results revealed that the application of 150:30:50 kg N: P₂O₅: K₂O/ha (T₈) led to superior growth parameters (plant height, leaf area index, drymatter production and number of branches/plant), yield attributes (number of panicle/plant, panicle length, panicle conversion efficiency, number of grains/panicle and test weight), yield (grain and stalk), and economic parameters (gross returns, net returns and benefit: cost ratio) for quinoa, outperforming other treatments except for 150:30:0 kg N: P₂O₅: K₂O/ha (T₄) during both seasons. The lowest values across all parameters were recorded for the control (T₉). It can be inferred from the investigation that the application of 150:30:50 or 150:30:0 kg N: P₂O₅:K₂O/ha significantly enhanced quinoa's growth, yield and economic parameters compared to lower nutrient doses in India.

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