Int.J.Curr.Microbiol.App.Sci (2017) 6(8): 3475-3480 3475 Original Research Article https://doi.org/10.20546/ijcmas.2017.608.416 Effect of Foliar Sprays of Nitrogen, Potassium and Zinc on Flowering and Yield Attributes of Guava cv. Taiwan Pink G.N. Kiran Kumar * , V. Sudha Vani, A.V.D. Dorajee Rao, P. Subbaramamma and R.V. Sujatha Department of Fruit science, College of Horticulture, Venkataramannagudem, Y. S. R. Horticultural University, Andhra Pradesh, India *Corresponding author ABSTRACT Introduction Guava (Psidium guajava L.) belongs to the family Myrtaceae, popularly known as „Apple of the Tropics‟ is one of the widely grown fruits of India. It is the fourth most important fruit crop in both area and production after mango, banana and citrus. Presently, it is widely grown all over the tropics and sub- tropics upto 1500 meters above mean sea level. It is originated in Tropical America and presently Mexico, Peru, Brazil, India, Thailand, USA (Hawaii), Philippines, China, Indonesia, Cuba, Java, Venezuela and Bangladesh are the leading commercial producers of guava. Guava has gained considerable prominence on account of its high nutritive and medicinal values and also aroma and flavour. It is a rich source of vitamin C, pectin, moderately good source of iron, calcium and a fair source of phosphorus, besides very rich sources of dietary fiber. In India, guava is cultivated in an area of about 2.68 lakh ha with a production of 36.67 lakh tonnes and productivity of 13.7 MT/ha (NHB, 2015). Application of fertilizers through soil are needed in higher quantities because some amount of fertilizers are lost through leaching International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 6 Number 8 (2017) pp. 3475-3480 Journal homepage: http://www.ijcmas.com The present investigation entitled “Effect of foliar sprays of nitrogen, potassium and zinc on flowering and yield attributes of guava cv. Taiwan Pink” was carried out at Farmer‟s field at Manchili village near Athili with the support of Department of Post-Harvest Technology at College of Horticulture, Dr. Y.S.R. Horticultural University, Venkataramannagudem, West Godavari District of Andhra Pradesh during 2016-2017. The experiment was laid out in randomized block design with three replication and ten treatments. The results revealed that foliar spray of plant nutrients improved yield parameters over the control. The highest number of flowers per shoot (7.20), fruit set percentage (74.88%), number of fruits per shoot (3.82), fruit yield (16.20 kg/tree), fruit retention (71.16%) and the lowest fruit drop percentage (28.84%) and highest fruit weight (293.33 g), fruit volume (266.66 cm 3 ), fruit length (8.40 cm) and fruit girth (8.67 cm) were recorded in plants sprayed with nitrogen in the form of urea @ 3% followed by plants sprayed with nitrogen in the form of urea @ 4%. Keywords Guava, Taiwan Pink, Urea, Potassium sulphate, Zinc Sulphate. Accepted: 27 June 2017 Available Online: 10 August 2017 Article Info