Abstract
Growing costs of fertilizers and increasing concern about ground water pollution has resulted indiscriminate or excessive soil fertilization problem that may be solved by more efficient fertilizer application technologies. The availability of new promising oriental pear or Japanese pear [Pyrus pyrifolia (Burm) Nakai] cultivar like ‘Patharnakh’, pave an opportunity for extending its cultivation under tarai region of Uttarakhand. Even though the cultivar ‘Patharnakh’ is good for tarai region but the quality is not much good to attract consumer acceptance. An experiment was conducted in 2013 to 2014 to study the effect of foliar spray of micronutrients on Pear. Fifteen year old pear trees were treated with three concentrations (1.0, 1.5 and 2.0%) of calcium and potassium nutrients viz., calcium chloride, calcium nitrate, potassium sulphate and potassium nitrate; and water spray as a control at 30 days intervals starting from fruit set, that is, 20th March 2013, 20th April 2013 and 20th May, 2013. Each treatment was replicated thrice, in which one tree serving as a unit treatment. The experiment was conducted in Factorial Randomized Block Design. The observations were recorded on the basis of biochemical characters viz., total soluble solids, acidity, ascorbic acid contents, total sugars, reducing sugar and non reducing sugar. Fruits treated with potassium nitrate at 1.5% showed the highest total soluble solids (11.72 ºBrix), total sugars (7.62%), reducing sugars (6.10%) and non reducing sugars (1.51%). However, titratable acidity (0.46 %), and ascorbic acid (6.42 mg/100 g) were found maximum with calcium chloride at 2.0% concentration. Therefore on the basis of economic point of view reducing the excessive cost of applied inputs by use of micronutrients can be an alternative to get quality produce. So, these treatments may be recommended for adaptation of Patharnakh pear in tarai region.
Key words: Pear, calcium and potassium spray, fruit quality.
