Nitrogen is a nutrient necessary for many functions of plants, e.g. shoot growth, fruit and flower bud set, and fruit size. In Latvia use of mineral fertilisers is limited by EU Directives and Regulations developed on the basis of the Guidelines of Integrated Production. The aim of the study was to investigate the effect of nitrogen (N) fertiliser on apple growth and production in the conditions of Latvia. The study was performed during 2013 to 2015. In an apple trial, seven cultivars on rootstock B.396 were planted in 2009. There were two fertiliser treatments: without fertilising and N 6 g·m-2. Significant effect of treatment was observed only in cultivar ‘Ligol’. Tree crown in the N treatment was over-dense, shoots too long, yet all cultivars had over-long shoots also in the unfertilised treatment. Effect of nitrogen in regard to amounts of acceptable and unacceptable shoots of the cultivars included in trial was negative. Nitrogen significantly increased the amount of unacceptable shoot types of cultivars ‘Gita’, ‘Rubin’ (Kazakhstan), and ‘Ligol’. Additional nitrogen as fertiliser had no significant effect on growth and yield of cultivars ‘Antei’, ‘White Transparent’ and ‘Konfetnoye.’ The cumulative yield of ‘Kovalenkovskoye’ and ‘Ligol’ was positively affected by nitrogen fertiliser. The most pronounced biennial yielding was observed for cultivar ‘Rubin’. Cultivar ‘Ligol’ had the most active and longer vegetation, especially in the nitrogen fertilisers treatment.
If the inline PDF is not rendering correctly, you can download the PDF file here.
Chen, B. C., Lai, H. Y., Liu, C. W., Sung, Y. (2014). Effects of nitrogen fertilisers on the growth and nitrate content of lettuce (Lactuca sativa L.). Int. J. Environ Res. Public Health, 11 (4), 4427-4440.
Cmelik, Z., Tojnko, S., Unuk, T. (2006). Fruit quality of ‘Fuji’ apple as affected by crop load and rates of nitrogen. Acta Hortic., 721, 147-152.
Ernani, P. R., Rogeri, D. A., Proenca, M. M., Dias, J. (2008). Addition of nitrogen had no effect on yield and quality of apples in a high density orchard carrying a dwarf rootstock. Rev. Bras. Frutic., 30 (4), 1113-1118.
Fallahi, E., Fallahi, B., Neilsen, G. H., Neilsen, D., Peryea, F. J. (2010). Effects of mineral nutrition on fruit quality and nutritional disorders in apples. Acta Hortic., 868, 49-60.
Gastal, F., Lemaire, G. N. (2002). Uptake and distribution in crops: An agronomical and ecophysiological perspective. J. Exp. Bot., 370 (53), 789-799.
Neilsen, G. H., Forge, T. A., Angers, D. A., Neilsen, D., Hogue, E. J. (2014). Suitable orchard floor management strategies in organic apple orchards that augment soil organic matter and maintain tree performance. Plant Soil, 378 (1-2), 325-335.
Neilsen, G. H., Neilsen, D., Guak, S., Forge, T. A. (2015). The effect of deficit irrigation and crop load on leaf and fruit nutrition of fertigated Ambrosia/ M.9 apple. HortScience, 50 (9), 1387-1393.
Sharifi, M., Zebarth, B. J., Burton, D. L., Rodd, V., Grant, C. A. (2011). Long-term effects of semisolid beef manure application to forage grass on soil mineralizable nitrogen. Soil Sci. Soc. Amer. J., 75 (1), 649-658.
Skrivele M., Dimza I., Rubauskis E. (2000). The cropping of nine apple cultivars as influenced by two different rootstocks. Fruit Sci. (Tartu), Nr. 207, 100-103
Surikova, V., Kārkliņš, A., Rubauskis, E., Skrīvele, M., Berlands, V. (2008). Influence of soil management treatment on root systems of apple-trees. In: Sustainable Fruit Growing: from Plant to Product: Proceedings of International Scientific Conference, 28-31 May 2008, Jûrmala. Latvia State Institute of Fruit Growing, Dobele, pp. 227-232.
Tagliavini, M., Scudellazi, D., Marangoni, B., Toselli, M. (1996). Nitrogen fertilisation management in orchards to reconcile productivity and environmental aspects. Fertiliser Res., 43 (1), 93-102.
Tamme, T., Reinik, M., Roasto, M. (2009). Nitrates and nitrites in vegetables: Occurrence and health risks. In: Watson, R. R., Preedy, V. R. (eds.). Bioactive Foods Promoting Health: Fruits and Vegetables. Academic Press, Salt Lake City, pp. 307-321.
Teravest, D., Smith. J. L., Boggs, L. C., Hoagland, L., Granatstein, D., Reganold, J. P. (2010). Influence of orchard floor management and compost application timing on nitrogen partitioning in apple trees. HortSci., 45 (4), 637-642.
Wang, Z. H., Zong, Z. Q., Li, S. X., Chen, B. M. (2002). Nitrate accumulation in vegetables and its residual in vegetable fields. Environ. Sci., 23 (3), 79-83.
Weinbaum, S. A., Johnson, R. S., Dejong, T. M. (1992). Causes and consequences of over fertilisation in orchards. HortTechnol., 2 (1), 112-121.
Wrona, D. (2011). The influence of nitrogen fertilisation on growth, yield and fruit size of ‘Jonagored’ apple trees. Acta Sci. Pol., Hortorum Cultus, 10 (2), 3-10.