~ 4838 ~ The Pharma Innovation Journal 2023; 12(6): 4838-4841 ISSN (E): 2277-7695 ISSN (P): 2349-8242 NAAS Rating: 5.23 TPI 2023; 12(6): 4838-4841 © 2023 TPI www.thepharmajournal.com Received: 18-03-2023 Accepted: 22-04-2023 Risham Datt Research Scholar, Department of Agriculture, GSSDGS Khalsa College, Patiala, Punjab, India Harpreet Kaur Assistant Professor, Department of Agriculture, GSSDGS Khalsa College, Patiala, Punjab, India Corresponding Author: Risham Datt Research Scholar, Department of Agriculture, GSSDGS Khalsa College, Patiala, Punjab, India Impact of organic manures and biofertilizers on growth and yield of onion (Allium cepa L.) Risham Datt and Harpreet Kaur Abstract The field experiment with onion crop was carried out at Campus for Research and Advanced Studies, Dhablan, PG Department of Agriculture, G.S.S.D.G.S. Khalsa College, Patiala during Rabi season in 2021-2022. The experiment was laid out in Randomized block design (RBD) comprising of eleven treatments and three replications. In case of different treatments maximum growth parameters such as plant height (53.91 cm), leaf length (49.69 cm), number of leaves plant -1 (8.59), yield parameters such as length of bulb (6.32 cm), neck thickness (2.32 cm), weight of bulb (61.22 g) and bulb yield (q ha -1 ) (383.50) was observed in the treatment T9: FYM (5 t ha -1 ) + Vermicompost (1.25 t ha -1 ) + Poultry manure (1.5 t ha -1 ) + Jeevamrut (5%) + Panchagavya (5%) + Azotobacter (2.5 Kg ha -1 ) + PSB (2.5 kg ha - 1 ) and this treatment was significantly superior over the other treatments. The minimum growth and yield were obtained from the treatment T1 (control). Keywords: Organic manures, biofertilizers, growth and yield Introduction The onion (Allium cepa L.) is a significant commercial bulb crop having chromosome number is 2n=16 and belongs to the Alliaceae family. It is a commercial vegetable grown in India, originally from Central Asia. Onion is regarded as the second most significant vegetable crop produced worldwide, after tomatoes. It is a rapidly expanding, short-lived crop with a variety of uses, like raw vegetables, spices, and medicines. It is one of the most widely grown and necessary vegetable and spice crops, grown for domestic use, export, and processing (Brar et al. 2015) [2] . The average onion includes 11.0 g of carbohydrate, 1.2 g of protein, 0.6 g of fiber, 86.8 g of moisture, and many vitamins, including thiamine (0.08 mg), riboflavin (0.01 mg), vitamin A (0.01 mg), and vitamin C (11 mg). Additionally, it contains a few minerals per 100 g of bulb, including phosphorus (39 mg), calcium (27 mg), sodium (1.0 mg), and potassium (157 mg) (Sharma et al. 2018) [10] . Nowadays liquid organic manures are becoming popular to conflict the adverse effect of chemical fertilizers. They can supply essential nutrients to the crop plant and also provide several growth promoters and bio-control agents to prevent disease and pest infestation. Liquid organic manures can be prepared by using several farm inputs and daily household materials. So, the cost required to prepare these liquid organic manures are very less comparing with the chemical fertilizers and pesticides. In order to maintain sustainability in agriculture liquid organic manures should be adopted in a large extent (Kannaiyan 2000) [6] , Kanwar et al. (2006) [7] . The use of organic manures and biofertilizers increases onion bulb output and enhances storage quality. The availability of Fe, Cu, Zn, and Mn in soil is increased when organic manures and inorganic fertilizers are combined (Ramesh et al. 2017) [9] . Materials and Methods The experiment was conducted during Rabi season 2021-2022 at the Campus for Research and Advanced Studies, Dhablan, G.S.S.D.G.S. Khalsa College, Patiala. The experiment with onion was laid out in Randomized block design (RBD) with eleven treatments and each treatment was replicated three times. The soil of the experimental field was clayey in texture and having pH 7.91, organic carbon 0.71%, available nitrogen 257.62 kg ha -1 , phosphorous 22.78 kg ha -1 and available potassium 102.25 kg ha -1. The nursery raising was done on 3 rd November 2021 and the healthy, disease-free seedlings were transplanted at the spacing of 15 cm × 7.5 cm.