Study was conducted in experimental farm of Junagadh Agricultural University, Gujarat India to find out the effect of foliar application of 1.0 per cent, 1.5 per cent or 2.0 per cent urea and zinc sulfate with concentration of 0.2, 04 and 0.6 per cent on guava crop, respectively, just before blooming significantly improved shoot growth, leaf number, area and weight. The best results were obtained with treatments of 1.0 and 1.5 per cent foliar spray of urea. In case of flowering, fruit set and fruit retention was better in treated plants with fertilizer. The size of fruits and yield per tree increased with increasing urea concentration and the significant variation in number of flowers per shoot was observed while non significant effect was observed under interaction effect of urea and zinc. The highest fruit weight and maximum fruit girth was registered with 0.6 per cent zinc. Thus, it is proved that 1.5 per cent urea solution and 0.6 per cent zinc sulphate were effective for the augmentation of growth and flowering attributes of guava.How to cite this paper : Parmar, J.M., Karetha, K.M. and Rathod, P.J. (2014). Effect of foliar spray of urea and zinc on growth and flowering attributes of guava (Psidium guajava) cv. BHAVNAGAR RED. Adv. Res. J. Crop Improv., 5 (2) : 140-143.
A field experiment was conducted during 2012-2013 to study the effect of foliar application of Zn and Urea on guava fruits to see the biochemical changes in guava fruits and found that the TSS, was significantly increased (11.85 O Brix) with treatment U 2 (1.5% urea). Acidity was significantly affected by Zn and urea treatments. It was noted that foliar spray of urea decreased the acidity. The minimum acidity of 0.48 per cent was observed where 1.5 per cent urea was sprayed. The ascorbic acid was significantly increased (220.79 mg/100ml) and the pectin content was also significantly affected by various levels of urea. Significantly the highest pectin content (0.67%) was observed with treatment U 2 (1.5% urea). The reducing sugar was significantly increased with urea @ 1.5% and same treatments recorded significantly the maximum non-reducing sugar (4.66%). The total sugar was significantly increased (7.03%) with treatment U 2 (1.5% urea). Over all result showed that foliar spray of urea and zinc sulfate can altered the biochemical parameters such as TSS, acidity, reducing sugar, pectin content, ascorbic acid , non-reducing sugar and total sugar in guava fruits.
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