Crop rotation: partial substitution of nitrogenous fertilizers and yield increment in rice crop

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Published: Jul 4, 2013
Keywords:
crop rotation, nitrogenous fertilization, rice, Oryza sativa, crop yield

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R. Morejón
Estación Experimental de Arroz �??Los Palacios�?�, Instituto Nacional de Ciencias Agrícolas

Abstract

With the objective of studying the effect of crop rotation (rice-sorghum-rice, rice-soybean-rice, rice-sunflowerrice and rice-rice-rice) and nitrogenous fertilizer (0, 68, 102 and 136 kg.ha-1) interaction on the partial substitution of nitrogen demands in rice crop, as well as on its yield, a yield experiment was carried out on a Ferruginous nodular Gley Hydromorphic soil from «Los Palacios» Rice Research Station of Pinar del Río for four years. Results have shown that by rice rotation with sorghum and soybean without nitrogenous fertilizers, equivalent yields to the application of 135 kg.ha-1 N in monoculture were achieved for four years. The highest rice yields were obtained in those areas with sorghum and soybean rotation and the application of 68 kg.ha-1 N, saving 68 kg.ha-1 N, which represents 50 % of the necessary nitrogenous fertilization to this crop. The successive rice seedings showed a high response to growing doses of nitrogenous fertilizer (? 136 kg.ha-1), attaining yields of just 4.2 t.ha-1, as well as its gradual decrease of the order of 1 t.ha-1 compared to the areas with crop rotation after the four tested years. Sorghum and soybean rotation in rice constitutes a nutritional alternative to the partial substitution of chemical nitrogenous fertilizers (50 %) and to achieve high yields (5.15 and 5.29 t.ha-1, respectively).

Article Details

How to Cite
Morejón, R. (2013). Crop rotation: partial substitution of nitrogenous fertilizers and yield increment in rice crop. Cultivos Tropicales, 21(2), 65–72. Retrieved from https://ediciones.inca.edu.cu/index.php/ediciones/article/view/743
Issue
Vol. 21 No. 2 (2000)
Section
Original Article

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