Study was conducted to find out the effect of various levels (100, 150, 200, 250,300 mg/plant/week) of nitrogen on growth parameters in terms of qualitative and quantitative traits of rose var. Top Secret. Plant growth in general increased with increase in nitrogen levels. Among various levels of nitrogen application, 300 mg nitrogen per plant per week significantly increased all vegetative growth parameters and showed maximum plant height (117.45 cm), leaf area (98.91 cm2 ) and a number of leaves (62.50). Further, flowering parameters like stalk length (83.53cm), bud diameter (2.45cm), bud length (2.55 cm), number of flowers per plant (7.30) as well as per square meter (53.05) were also significantly maximum in plants given nitrogen @ 300 mg per plant per week. Leaf N (2.94 %), P (0.19%), K (1.87%) and chlorophyll content in leaves (4.41mg/g) was also higher with 300 mg N per plant per week. Vase life (10 days) and anthocyanin content in petal tissue (2.09 mg/g) were found the maximum in plants given nitrogen @ 250 mg per plant per week, which was at par with the treatment of nitrogen @ 300 mg per plant per week. Nitrogen should be applied at the rate of 300 mg/plant/week under protected cultivation as the optimum dose for good plant growth and qualitative flower production in rose var. Top Secret under protected cultivation.
Nitrogen, Poly house, Rose var, Vegetative growth parameters
Ashok, A. and Rengasamy P. (2000). Effect of N fertigation different levels and sources on the growth of cut rose cv. â€œFirst Redâ€ under green house conditions. South Indian Hort., 48: 139-141.
Bernier,G.Havelange, A.Houssa, C.Petitjean, A. and Lejeune, P. (1993). Physiological signals that induce flowering. The Plant Cell, 5: 1147-1155.
Bhattacharjee, S. K. and Damke, M. M. (1995). Response of Super Star rose to nitrogen, phosphorus and potash fertilization. Indian J. Hort., 51 (2): 207-213.
Bijmol, GandSingh, A. (2003). Effect of spacing and nitrogen on gladiolus. J. Ornam. Horti., 6 (1): 73-75.
Bongue-Bartelsman, M.and Phillips, D. A. (1995). Nitrogen stress regulates gene expression of enzymes in the flavonoid biosynthetic pathway of tomato. Plant Physiol. Biochem.,33: 539-546.
CBI market intelligence. (2015). Trade statistics cut flowers and foliage. pp.2-8.
Cabrera, R. I. 2004. Evaluating yield and quality of roses with respect to nitrogen fertilization and leaf nitrogen status. XXV International Horticultural Congress, ISHS Acta Horticulturae. 511: 157-170.
Chaudhary, S.S.(2007). Effect of nitrogen and phosphorus application on plant growth and bulb production in tuberose. Haryana J. Hort.Sci.,36(1and2): 82-85.
Chaudhary, U. C.Singh, A, Ahlawat, T. R. and Palagani, N. (2016). Influence of nitrogen on growth parameters and leaf nutrient composition of rose cv. Samurai under protected conditions. The Bioscan11(3): 1377-1380.
Gerherdt (2007). Operation Manual of Dumatherna N Analyzer Gerherdt, Germany.
Halevy, A. H.and Mayak, S. (1974). Improvement of cut flower quality opening and longevity by pre-shipment treatments. Acta Horti., 43: 335-347.
Harper, J. E.and Paulsen, G. M. (1969). Nitrogen Assimilation and Protein Synthesis in Wheat Seedlings as affected by Mineral nutrition. I. macronutrients Plant Physiol., 69-75.
Jackson, M. L.(1967). Soil Chemical Analysis. Asia publishing House, Bombay.
Katiyar, R. S., Balak, R.and Singh, C. P. (1999). Effect of N and P on growth and flower production in rose on sodic soils. Indian J. Hort., 56 (1): 86-87.
Lees, D. H. and Francis, F. J. (1972). Standardization of pigment analyses in cranberries. Hortscience,7(1):83-84
Lovatt, C. J.,Zheng, Y. and Hake, K. D. (1988). Anew look at the Kraus-Kraybill hypothesis and flowering in citrus. Proc. 6th Int. Citrus Congress.,1: 475â€“483.
Macadam, J. W., Nelson, C. J. and Volenec, J. J (1989). Effects of nitrogen on mesophyll cell division and epidermal cell elongation in tall fescue leaf blades. Plant Physiol., 89: 549-556.
Panse, V. G. and Sukhatme, P. V.(1985). â€œStatistical Method for Agricultural Workersâ€ ICAR, New Delhi.
Politycka, B. and Golcz, A. (2004). Content of chloroplast pigments and anthocyanins in the leaves of Ocimum basilicum L. depending on nitrogen doses. Folia Hort. Ann., 16/1: 23-29.
Qusim, M.,Ahmed, I. and Ahmed, T. (2008). Optimizing fertigation frequency for rose (Rosa hybrida L.) Pak.J.Bot., 40(2): 533-545.
Rani, N.,Kumar, R. and Dhatt, K. K. (2005). Effect of nitrogen levels and growing media on growth, flowering and bulb production of Lilium cultivars J. Ornam. Hort., 8(1): 36-40.
Singh, K. P. (2000). Response of graded levels of nitrogen in tuberose (Polinathes tuberosa L.) cv. Single. Adv. Plant Sci., 13(1): 283-285.
Sunitha, H. M. (2006). Effect of plant population, nutrition, pinching and growth regulators on plant growth, seed yield and quality of African marigold (Tagetes erecta L.). M. Sc. (Hort.) Thesis, Univ. Agric. Sci., Dharwad, India.
Tatte, S., Singh, A. and Ahlawat, T. R. (2016). Effect of polyamines and natural growth substances on the growth and flowering of Rose (Rosa hybrida) cv. Samurai under protected conditions, Journal of Applied and Natural Sciences, 8(3) : 1317-1320
Thanapornpoonpong, S., earasilp, S.,Pawelzik, E. andGorinstein, S. (2008). Influence of various nitrogen applications on protein and amino acid profiles of amaranth and quinoa. J. Agric. Food Chem., 56:11464â€“11470.
Tucker, M. (2004). Primary Nutrients and Plant Growth. - In: Essential Plant Nutrients (SCRIBD, Ed.). North Carolina Department of Agriculture.
Uma, S and Gowda, J. V. N. (1987). Studies on the effect of pruning, nutrients and their interaction on growth and flowering of rose cv. Super Star. Mysore J. Agril. Sci., 21 (4): 446-455.
Wellburn, A. R. (1994). The special determinations of chlorophyll a and b as well as total carotenoides using various solvents with spectrophotometers of different resolution, J Plant Physio., 144: 307- 313.
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