Rice varietal growth and productivity from different cycles at two sowing dates during winter season in Los Palacios, Pinar del Río

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Published: Jul 9, 2012
Keywords:
Oryza sativa, rice, biomass, crop yield, growthPalabras

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L. A. Maqueira
Estación Experimental del Arroz Los Palacios, Pinar del Río

Abstract

This work was carried out in the areas from LosPalacios Rice Research Station of INCA, Pinar del Río, usingINCA LP-5 and Reforma as short-cycle varieties, besides INCALP-2 and J-104 as mid-cycle ones, during the dry season ofJanuary 2004 and February 2005, on an Ironstone Nodular GleyHydromorphic soil, with the objective of evaluating thebehavior of rice varietal growth and productivity. A directseeding technology was employed with a pattern of 120 kg.ha-1.Agrotechnical activities followed rice crop technicalinstructions. A randomized block design with four replicationsand 25-m2 experimental plots was used. Dry matter of the aerialpart of plants (g.m-2) was determined in a 25-m2 frame andsamplings were fortnightly performed 25 days after germinationuntil harvest. The absolute growth rate and leaf area indexwere calculated, besides determining agricultural yields andits main components; all data were processed by means of asingle Anova through Duncan´s multiple range test (p<0.05).Considering the results, it should be highlighted thatagricultural yield was higher in short-cycle varieties than inthe mid-cycle ones, with higher leaf area index values in thosevarieties. Radiation availability during the reproductive phaseat the sowing date of February 2005 was a limiting factor forthe varieties to reach top dry matter production and so toachieve higher yields. The best results of INCA LP-5 andReforma could be related to varietal genetic characteristics,which are recommended for the breeding programs to searchfor new more productive cultivars.

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How to Cite
Maqueira, L. A. (2012). Rice varietal growth and productivity from different cycles at two sowing dates during winter season in Los Palacios, Pinar del Río. Cultivos Tropicales, 31(4), 87–92. Retrieved from https://ediciones.inca.edu.cu/index.php/ediciones/article/view/87
Issue
Vol. 31 No. 4 (2010)
Section
Original Article

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