Enhancing the food production for the growing world population has needed application of highly sustainable and efficient inputs to produce more food per unit of land. Hence, Tamil Nadu Agricultural University (TNAU), Coimbatore, Tamil Nadu has produced Water soluble fertilizers (WSF) in its maiden attempt and it is necessary to optimize on different crops. Small onion is one of the most important vegetables in the Indian diet and it has high demand but low productivity. To enhance crop productivity and quality of small onions, the application of TNAU-WSF was taken up. A field experiment was laid out in a Randomized block design (RBD) incorporating 8 treatments comprising of application of RDF at100% NPK as TNAU WSF, soil test based application of 75%, 100%, 125% NPK ha-1 as TNAU-WSF with soil application of sulphur (S) and foliar spray of TNAU Liquid multi micronutrient (LMM) and without S and TNAU LMM and absolute control. Each treatment was replicated thrice with onion (CO 4). Soil test based application of 125% NPK ha-1 as TNAU-WSF with sulphur (S) and TNAU LMM recorded significantly higher in plant height (54.01 cm), the number of leaves per bulb (8.56), leaf greenness (67.5 SPAD), root length (5.42 cm), polar bulb diameter (4.38 cm), equatorial bulb diameter (2.72 cm) fresh bulb weight (74.21 g), bulb yield (1751 t ha-1) and quality attributes like total soluble solids (TSS) (14.78 °Brix), ascorbic acid content (15.34 mg 100 g-1), pyruvic acid content (2.27 µmol g-1). However, soil test based application of 100% NPK ha-1 as TNAU-WSF was found to be an ideal rate to attain the economic target yield of the onion crop.
Fertigation, TNAU Liquid multi micronutrient (TNAU LMM), Soil test based fertilizer application, TNAU-WSF, Water soluble fertilizers
Agricultural statistics at a glance (2020). Government of India Ministry of Agriculture & Farmers Welfare Department of Agriculture, Cooperation & Farmers Welfare Directorate of Economics and Statistics. Retrieved September 08, 2021, https://eands.dacnet.nic.in/PDF/Agricultural %20Statistics%20at%20a%20Glance%20-%202020%20(English%20version).pdf
Amare, G. (2020). Review on Mineral Nutrition of Onion (Allium cepa L). The Open Biotechnology Journal, 14(1),134-144. http://dx.doi.org/ 10.2174/187407070201401 0134
Anthon, G. E. & Barrett, D. M. (2003). Modified method for the determination of pyruvic acid with dinitrophenylhydrazine in the assessment of onion pungency. Journal of the Science of Food and Agriculture, 83(12), 1210-1213. https://doi.org/10.1002/jsfa.1525
Association of Official Analytical Chemists (1995). Official methods of chemical analysis. Association of Official Analytical Chemists (AOAC) Arlington, Virginia, USA.
Babu, V. A., Thingalmaniyan, K. S. & Natarajan, S. K. (2018). Influence of Drip Fertigation on Yield, Quality parameters and Economics of Aggregatum Onion. Madras Agricultural Journal, 105 (1-3), 1. doi:10.29321/MAJ 2018.000192
Ballabh, K. & Rana, D. K. (2012). Response of micronutrients on qualitative and quantitative parameters of onion (Allium cepa L.). Progressive Horticulture, 44(1), 40-46.
Bharaani, S. C., Kaleeswari, R. K., Amirtham, D., Vasanthi, D. & Thavaprakaash, N. (2020). Promotional effect of water soluble fertilizers on growth and yield of lowland rice. Madras Agricultural Journal, 107(4/6), 198-203.
Bhasker, P., Singh, R. K., Gupta, R. C., Sharma, H. P. & Gupta, P. K. (2018). Effect of drip irrigation on growth and yield of onion (Allium cepa L.). J. Spices and Aromatic Crops, 27(1), 32-37. doi: 10.25081/josac.2018.v2 7.i1.10 12.
Crop production guide – Horticulture (2020). Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu. Retrieved September 15, 2021, https://tnau.ac.in/research/wp-content/uploads/sites/60/2020/02/Agriculture-CPG-2020.pdf
Dingre, S. K. & Pawar, D. D. (2015). Enhancing productivity of onion seed through fertigation scheduling in western Maharashtra. Vegetable Science, 42(2), 15-20.
Gonçalves, F. D. C., Grangeiro, L. C., de Sousa, V. D. F., Santos, J. P. D., Souza, F. I. D. & da Silva, L. R. (2019). Yield and quality of densely cultivated onion cultivars as function of nitrogen fertilization. Revista Brasileira de Engenharia Agrícola e Ambiental, 23, 847-851. https://doi.org/10.1590/1807-1929/agriambi.v23n11p847-851
Hou, W., Shen, J., Xu, W., Khan, M. R., Wang, Y., Zhou, X. & Zhang, Z. (2021). Recommended nitrogen rates and the verification of effect based on leaf SPAD readings of rice. PeerJ, 9, e12107. https://dx.doi.org/10.7717%2Fpeerj.12107
India Meteorological Department (2021). Ministry of Earth Sciences, Government of India. Retrieved January 23, 2021, https://mausam.imd.gov.in/
India Stat (2018). Database management company, New Delhi. Retrieved September 12, 2021, https://www.india stat.com/data/agriculture
Jain, G., Kushwah, S. S., Singh, O. P. & Verma, K. S. (2014). Effect of different doses of nitrogen and sulphur on growth, yield and quality of onion (Allium cepa). Indian J. Agr. Sci, 84(11), 1352-1357.
Kakade, S. U., Bhale, V. M. & Deshmukh, J. P. (2015). Effect of split application of nutrients through fertigation on growth, yield and quality of onion. International Journal of Tropical Agriculture, 33(4 (Part III)), 3279-3283.
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
This work is licensed under Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) © Author (s)