Resumo

LOPEZ, Andrés; GOMEZ, Manuel Iván  e  RODRIGUEZ, Luis Ernesto. Effect of edaphic and foliar applications of different doses of zinc on the yield of the Criolla Colombia cultivar. Agron. colomb. [online]. 2014, vol.32, n.1, pp.70-77. ISSN 0120-9965.  https://doi.org/10.15446/agron.colomb.v32n1.38673.

The present study was carried out in a Typic Hapludand soil in the municipality of 'El Rosal' (Colombia) and aimed to compare the yield performance of the cultivar Criolla Colombia under foliar applications of Zn chelate (0, 1, 2 and 3 kg ha^-1) and edaphic applications of granulated Zn sulfated (0, 1, 2 and 3 kg ha^-1). A split-plot, randomized complete block design, with four repetitions per treatment, was employed. In each category, the evaluated variables were: tuber weight and number of tubers. The results revealed that the 3.0 kg ha^-1 edaphic application rendered a quadratic yield behavior with a relative increase of 7.9 t ha^-1 (136%) for the first category tuber weight and 9.5 t ha^-1 (68%) for total weight. In turn, the foliar application of the same dose resulted in a 5.8 t ha^-1 (93%) relative increase and a first category tuber total weight increase of 3.8 t ha^-1 (24%). Under the edaphic and foliar Zn applications, the number of tubers underwent 77 and 86% increases, respectively, with respect to the control. These results show the importance of Zn in photoassimilate accumulation efficiency, structure differentiation and tuber quality in this short-cycle crop.

Palavras-chave : fertilization; diploid potato; micronutrients; tubers; Andean crops.

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