Studies on the physiology of mango cv. Ratna as influenced by N and K through fertigation.
Sivakumar V., Kumar R. M. V., Soorianathasundaram K.
Author Affiliation: Department of Horticulture, Agricultural Research Station, Bhavanisagar - 638 451, Erode district, Tamil Nadu, India.
Plant Archives 11 : 367-372
Abstract : Studies were conducted during 2005-07 at Faculty of Horticulture TNAU, Coimbatore on the influence of N and K nutrients (as 50, 75 and 100% of recommended dose of fertilizers through fertigation) on the physiology of mango cv Ratna under high density planting. The nutrient 'P' as applied at recommended dose uniformly to all the experimental plots. In addition to the above levels of N and K, one control plot was maintained having 100% of the recommended dose applied through soil. All the treatments were replicated thrice with six trees of eight years age per plot. The results revealed that among the different treatments tried, application of 100% of the recommended dose of nutrients (100:50:100 g N & K per tree per year) through fertigation has resulted in a superior performance by the physiological parameters which contribute for higher yield namely, chlorophyll a, b and total chlorophyll, soluble protein content, total carbohydrate content, C/N ratio, peroxidase activity in leaves and nitrate reductase activity. The same treatment recorded the least values with respect to total phenol content and IAA oxidase activity.