A field study was undertaken to extrapolate the impact of foliar application of potash and its spray schedule on yield and physical and chemical parameters of sweet orange cv. Jaffa at experimental orchard, Department of Horticulture, CCS Haryana Agricultural University, Hisar. The results revealed that foliar application of KNO? at both the doses (2 and 4%) was found significantly or marginally better than K?SO? (1.5 and 3.0%) and control (water spray) in increasing the juice content. Peel content, peel thickness and rag content was found to be influenced significantly due to different treatments on K and its spray schedule. Minimum rag content (38.11%) was recorded with foliar application of KNO? at the rate of 4% and maximum with control. Ascorbic acid and acidity were found maximum with two foliar applications of KNO? at the rate of 4% in the last week of April and August. Foliar application of KNO? at the rate of 4% was found most effective in increasing yield of sweet orange over control and other K treatments. Spray of K in the last week of April, May and August was found superior in increasing yield closely followed by two sprays in the last week of April and August. The findings signify the importance of K spray in enhancing yield and quality of sweet orange under semi-arid north western conditions of India.
Chemical parameters, Foliar application, Potash, Sweet orange, Yield
AOAC (2000). Official methods of analysis. Association of Analytical Chemists, 15th Ed., Washington, D.C.
Boman, B.J. and Hebb, J.W. (1998). Post bloom and summer foliar K effects on grapefruit size. Proc. Fla. State Hort. Soc.,111:128-135
Calvert, D.V. (1969). Spray applications of potassium nitrate for citrus on calcareous soils. Proc. 1st Intl. Citrus Symposium, 3:1587-1597
Dutta, P., Ahmed, B. and Kundu, S. (2011). Effect of different sources of potassium on yield, quality and leaf mineral content of mango in West Bengal. Better crops-South Asia. pp. 16-18
Gill, P.S., Singh, S.N. and Dhatt, A.S. (2005). Effect of foliar application of K and N fertilizers on fruit quality of kinnow mandarin. Indian J. Hort., 62:282-284
Hamza, A., Bamouh, A., Guilli, M.El. and Bouabid, R. (2012). Response of Clementine citrus var. Cadoux to foliar potassium fertilization; Effects on fruit production and quality. e-ifc No. 31, pp:8-15
Harold, J.E. and George, J.S. (1966). Role of mineral elements with emphasis on the univalent cations. Ann. Pl. Physiol., 11:47-76
Kumar, A.R. and Kumar, N. (2007). Sulphate of potash spray effects on yield, quality and post harvest life of banana. Better crops, 91:22-24
Kundu, P.K. and Biswas, C. (2009). Effect of different treatment combinations of nitrogen and potassium on fruit quality of sweet orange cv. Mosambi. Orrisa J. Hort, 37 (2):52-55
Mengal, K. (1997). Impact of potassium on crop yield and quality with regard to economical and ecological aspect. Proc. Reg. Workshop, Int. Potash. Inst., Izmir, Turkey.
Omaima, M.H. and El-Metwally, I.M. (2007). Efficiency of zinc and potassium sprays alone or in combination with some weed control treatments on weeds growth, yield and fuit quality of Washington Navel orange orchards. J. Applied Sci. Res., 3 (7):613-621
Rattanpal, H.S., Rani, Shobha, Kumar, A. and Dhaliwal, H.S. (2005). Effect of potassium and 2,4-D sprays on-physical parameters of Kinnow fruits. Haryana J.Hortic. Sci., 34 (3-4):222-223
Sangwan, A.K., Rattanpal, H.S., Arora, N.K. and Dalal, R.S. (2008). Effect of foliar application of potassium on fruit yield and quality of Kinnow mandarin. Environ. Ecol., 26 (4C):2315-2318
Sanofer, A.A. (2014). Role of citrus fruits in health. J. Pharm. Sci. & Res., 6(2):121-123
Saxena, M. and Gandhi, C.P. (2014). Indian Horticulture Database, National Horticulture Board, Ministry of Agri. Government of India, India.
Singh, H. and Singh, R. (1981). Effect of nutrient spray on granulation and fruit quality of Dancy tangerine. Scientia Horticulturae, 14:235-244
This work is licensed under Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) © Author (s)