Effect of foliar spray of urea and zinc on growth and flowering attributes of guava (Psidium guajava) cv. BHAVNAGAR RED

Abstract

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.

Effect of Foliar Sprays of Nitrogen, Potassium and Zinc on Flowering and Yield Attributes of Guava cv. Taiwan Pink

“…The highest number of flowers per shoot recorded in plants sprayed with different concentrations of urea might be due to significant increase in number of shoots per plant with floral meristems and ultimately ended with an individual flower. The increase in number of flowers per shoot in present study was in agreement with the results obtained by Parmar et al, (2014) and Giriraj and Kacha (2014) in guava. Number of flowers per shoot was increased with an increase in concentration of urea up to 3.0 % but it decreased with foliar spray of 4 % urea.…”

Enhancement of Yield and Quality of Guava cv. Lucknow-49 by Foliar Application of Nutrients under High-Density Planting System

“…Lucknow -49. Similar results were reported by Parmar et al (2014) in guavaand in banana, water-soluble fertilizers has resulted in early cropping and higher bunch weight (Kavinoet al, 2002).The fruit yield per plant of about 17.67 kg (Table . 1)and the lowest yield per plant of 13.91 kg was registered in control. The number of fruits per plant was found to be higher (80.35) in the plants sprayed with NPK (19:19:19) 1% along with Boron 0.4%.Total soluble solids (10.60 0 Brix), total sugars (6.65 %), reducing sugars (5.15 %) and non-reducing sugars (2.24 %) were also found to be higher in the fruits sprayed with NPK (19:19:19) at 1% along with Zinc sulphate 0.5 % and Boron 0.4% (Fig.…”

Effect of raised bed, mulching and fertigation on productivity and quality of guava (Psidium guajava L.) under high density planting system

“…of water and nutrients, lower leaching losses and more controllable application of nutrients as compared to conventional nutrient and water supply methods (Singh et al, 2017). Increase in guava yield due to foliar spray of zinc sulphate may be due to increase in number of fruits per tree either by improving pollen germination or by helping the growth of pollen tubes, thus facilitating in timely fertilization before stigma loses its receptivity or style becomes non-functional and also helped to increase fruit weight by regulating metabolic activities leading to increased stored food materials in the fruit tissues (Parmar et al, 2014), besides, improving retention of fruits on the tree by increasing the internal auxin levels through zinc mediated biosynthesis of tryptophan. The positive effect of boric acid on guava yield may be attributed that boron has role in cell wall structural integrity, cell expansion and transport of minerals, thereby increasing mobilization of photosynthates from all other parts of the plant towards developing fruits which are extremely active metabolic sink .…”