WALNUT CULTIVARS WITH PERSPECTIVES FOR ECOLOGICAL CULTURE IN ROMANIA
DOI:
https://doi.org/10.51258/RJH.2021.11Keywords:
organic culture, Juglans regia, cultivar testing, crop, nut treesAbstract
The objectives of the present study were to analyze the behavior of 11 Romanian walnut cultivars and one French cultivar (‘Franquette’) in North East of Oltenia, under conventional and during conversion to organic nut production. During conventional growing, the highest mean yields were recorded for ‘Jupânești’ (2.88 t/ha), ‘Valcor’ (2.77 t/ha), ‘Verisval’ (2.58 t/ha), 'Unival' (2.55 t/ha) and in the case of organic production the highest yields were observed for ‘Jupânești’ (3.5 t/ha), ‘Valcor’ (2.95 t/ha), ‘Unival’ (2.67 t/ha), ‘Verisval’ (2.62 t/ha), ‘Valrex’ (2.56 t/ha) and ‘Redval’ (2.54 t/ha). Nuts of these cultivars were subject to measurements regarding fruit size index, index of roundness, nut weight, kernel weight and kernel ratio. The nuts of each cultivar were divided according to class sizes for the international markets. Cultivars with more than 80% of nuts larger than 32 mm were: ‘Valcris’, ‘Sibișel 44’, ‘Valcor’, ‘Germisara’ and ‘Franquette’. The walnut cultivars were evaluated depending on the attack of walnut blight (Xanthomonas arboricola pv. juglandis) and anthracnosis (Gnomonia leptostyla) on leaves and fruits. Walnut blight and anthracnosis attacks were observed on ‘Sibișel 44’, ‘Germisara’, 'Velnița' and ‘Franquette’, while the least affected proved to be: ‘Valcor’, ‘Valcris’, ‘Unival’, ‘Jupânești’ and ‘Verisval’. As consequence, the following walnut cultivars have perspectives to be used for the ecological culture in Romania: ‘Valcor’, ‘Jupânești’, ‘Valrex’, ‘Verisval’, ‘Unival’, ‘Redval’, ‘Velnița’, ‘Timval’, ‘Germisara’, ‘Valcris’ and ‘Franquette’.
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Achim, Gh., Baciu, A., Botu, I., Botu, M., Cosmulescu, S., Glăman, Gh., and Godeanu, I. (2018). Walnut culture. Ed. Alma, Craiova.
Aleta, N., Vilanova, A., Tomas, E., and Guardia, M. (2014). Fruit resistance in seven commercial walnut cultivars. Acta Hort., 1050; 389-393.
Aslamarz, AA., Vahdati, K., Raheni, M., and Hassani, D. (2010). Cold - hardiness evolution of Persian walnut by terminal analysis and freezing technique. Acta Hort, 861; 269-272.
Botu, I., Botu, M. and Achim, G. (2001). Cultura nucului în exploataţii nucicole moderne. Editura Phoenix, Braşov.
Botu, M. (1998). Nut crops situation in Romania. FAO Nucis Newsletter 7; 23-24.
Botu, M., and Achim, Gh., (2014). Following Walnut Footprints in Romania; 327-335. In: Avanzato, D., McGranahan, G.H., Vahdati, K., Botu, M., Iannamico, L., Van Assche, J. Eds (2014). Following Walnut Footprints (Juglans regia L.) Cultivation and Culture, Folklore and History, Traditions and Uses. International Society for Horticultural Science (ISHS) and the International Nut and ried Fruit Council (INC). Scripta Horticulturae No. 17.
Botu, M., Alabedallat, Y.F.J., Bucura, F., Geană, E.I., and Vladu, M. (2019). The productive capacity and quality of several walnut cultivars (Juglans regia L.) Grown in North Oltenia, Romania. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 47(3); 574-579.
Botu, M., Botu, I., Achim, G., Stancu, A., and Alabedallat, Y.F.J. (2017). Evaluation of differentiation between Romanian walnut cultivars and those with lateral bearing from warmer areas. Annals of the Academy of Romanian Scientists Series on Agriculture, Silviculture and Veterinary Medicine Sciences. Volume 6, Number 2; 5-14.
Botu M., and Tudor, M. (2005). Comportarea unor soiuri de nuc în procesele de creștere și fructificare în zona subcarpatică a Olteniei. Ses. Șt. Referate ICDP Pitești - ASAS București.
Botu, M., Tudor, M., Botu, I., Cosmulescu, S., and Papachatzis, A. (2010). Evaluation of Walnut Cultivars in the Conditions of the Oltenia’s Hill Area Regarding Functioning Potential. Analele Univ. din Craiova., Vol. XV (XLXI). Ed. Universitaria – Craiova; 94-103
Burke, M.J., Gusta, L.V., Quamme, H.A., Weiser, C.J. and Li, P.H. (1976). Freezing and injury in plants. Annual Review of Plant Physiology, 27: 507-528.
Charrier G., Poirier M., Bonhomme M., Lacointe A., and Améglio T. 2013. Frost Hardiness in Walnut Trees (Juglans regia L.): How to link physiology and modelling? Tree Physiol; 33 (11): 1229-1241. DOI:10.1093/treephys/tpt090.
DeBuse, C. (2009). Managing walnuts for cold temperatures. Farmer Progress, USA. https://www.farmprogress.com/tree-nuts/managing-walnuts-cold-temperatures
Gandev, S. (2013). Winter hardiness of reproductive organs of the walnut cultivar. Bulgarian Journal of Agricultural Science, 19 (No 5), 1068-1070
Giura S, Botu M., Vulpe M, Vîjan L.E., Mitrea R. (2019). Evolution of the polyphenols, flavonoids, and tannins content in walnut leaves and green walnut husk during growing season. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 47(4), 1264-1271.
Grimo, E. (1979). Carpathian (Persian) walnuts. In: Jaynes RA (Ed). Nut tree culture in North America. Northern Nut Growers Association, Hamden, Connecticut, pp 74-83.
Onofri, A. (2007). Routine statistical analyses of field experiments by using an Excel extension. Proceeding’s 6th National Conference Italian Biometric Society: “La statistica nelle scienze della vita e dell’ambiente”, Pisa, (2007): 93–96.
Rubel, F., and Kottek, M. (2010). Observed and projected climate shifts 1901-2100 depicted by world maps of the Köppen-Geiger climate classification. Meteorol. Z., 19, 135-141. DOI 10.1127/0941-2948/2010/0430
DSAASTAT ver. 1.514 (2015) www.casaonofri.it/repository/DSAASTAT.xls
FAO Stat Database Web Page (2021). https://www.fao.org/faostat/en
FIBL Statistics Web Page (2021). https://statistics.fibl.org/
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