~ 658 ~ International Journal of Chemical Studies 2018; 6(6): 658-661 P-ISSN: 2349–8528 E-ISSN: 2321–4902 IJCS 2018; 6(6): 658-661 © 2018 IJCS Received: 24-09-2018 Accepted: 25-10-2018 Sangeeta Chandrakar Department of Fruit Science, College of Agriculture, Indira Gandhi Krishi Viswa-Vidyalaya, Krishak Nagar, Raipur, Chhattisgarh, India Prabhakar Singh Department of Fruit Science, College of Agriculture, Indira Gandhi Krishi Viswa-Vidyalaya, Krishak Nagar, Raipur, Chhattisgarh, India Hemant Kumar Panigrahi Department of Fruit Science, College of Agriculture, Indira Gandhi Krishi Viswa-Vidyalaya, Krishak Nagar, Raipur, Chhattisgarh, India Sarita Paikra Department of Fruit Science, College of Agriculture, Indira Gandhi Krishi Viswa-Vidyalaya, Krishak Nagar, Raipur, Chhattisgarh, India Sangeeta Chandrakar Department of Fruit Science, College of Agriculture, Indira Gandhi Krishi Viswa-Vidyalaya, Krishak Nagar, Raipur, Chhattisgarh, India Effect of foliar feeding of calcium and micro- nutrients on quality parameters of strawberry ( Fragaria x ananassa Duch.) cv. Nabila under net tunnel Sangeeta Chandrakar, Prabhakar Singh, Hemant Kumar Panigrahi and Sarita Paikra Abstract The experiment was conducted at Research Farm of Centre of Excellence on Protected Cultivation and Precision Farming under net tunnel, College of Agriculture, IGKV, Raipur (C.G.) to find out the beneficial effect of Ca and micro-nutrients on quality attributing parameters of strawberry cv. Nabila under net tunnel condition with ten treatments and three replications in Completely Randomized Block Design. The treatment consisted ten different concentrations of Ca and micro-nutrients along with recommended dose of fertilizers viz. T0: RDF + Control (water spray), T1: RDF + CaCl2 @ 0.4%, T2: RDF + CaCl2 @ 0.6%, T3: RDF + CaCl2 @ 0.8%, T4: RDF + ZnSO4 @ 0.4%, T5: RDF + ZnSO4 @ 0.6%, T6: RDF + ZnSO4 @ 0.8%, T7: RDF + FeSO4 @ 0.4%, T8: RDF + FeSO4 @ 0.6% and T9: RDF + FeSO4 @ 0.8%. As regards the quality parameters i.e. total soluble solids, TSS: acid ratio, total sugar, reducing sugar, non-reducing sugar and ascorbic acid content were recorded maximum under the treatment RDF + ZnSO4 @ 0.6%, however the minimum acidity (0.42%) was recorded under the same treatment. Keywords: Calcium, micro-nutrients, quality, strawberry etc. Introduction The cultivated strawberry (Fragaria × ananassa Duch.) is octaploid in nature (2n=8x=56). It belongs to the family Rosaceae. Botanically, strawberry fruit is termed as aggregate fruit and the edible part is succulent thalamus. It is mainly propagated through runners which is one year old. Its fruits are mainly consumed as dessert. In addition to fresh consumption, it is specially demanded by the fruit processing units for the preparation of jams, jelly, ice-creams, syrups, quick freezing and canning. It is one of the important fruit crops whose cultivation is having ample scope near the fruit preservation factories as well as big cities. In India the total area of strawberry is 1000 ha with production of 5000 MT (Anonymous, 2016) [1] . In India, Maharashtra is the leading State in production of strawberry fruits. It is also commercially grown in Haryana, Punjab, Uttar Pradesh, Jammu and Kashmir, Uttarakhand and lower hills of Himachal Pradesh. It has been widely adopted as the small fruits having 98% edible portion. Strawberry is a delicious fruit can be taken fresh as table fruit or in processed form. It is good source of vitamin C and Iron. Fruit shape differs depending upon the variety. It may be conical, round and long to conical, conical with constricted base and cylindrical ground. The strawberry fruit contains 89-90% moisture, 0.7-9.2g protein, 8.4-9.2g carbohydrate, 0.5g fat, 59-120 mg vitamins C per 100g of fresh weight of fruit. The fruit of strawberry is good for those people suffering from anemia biliousness and indigestion. Among various soft fruits, strawberry is one of the most nutritious and delicious fruit and can be grown under various climatic conditions. The strawberry fruit contains 0.90 to 1.85% acidity the prominent being mallic and citric acid and 0.55% total sugar. The nutrition status of strawberry plant plays a vital role in determining the quality of fruits since it is a very sensitive plant to nutritional balance (Mohamed et al., 2011) [9] . An optimal fertilization is contributive in obtaining high yield of good quality and high biological value. Both calcium and micro-nutrients are well known to ameliorate quality of fruits. The beneficial effects of Ca on maintaining fruit quality and increasing shelf life are well documented by