Chemical fertilization programs on promissory rice lines (Oryza sativa L.)

Abstract

This research was carried out at the Technical University of Babahoyo, Agricultural Sciences Faculty, located at 7 ½ Km from the Babahoyo-Montalvo road. The main objectives of the study are: To evaluate the chemical fertilization effect, based on the rice crops’ soil analysis, to identify the highest production genotype, and to analyze the chemical fertilization treatments from the economic point of view. Three treatments (genetic material), such as INIAP 15, GO37647, and GO39845 lines were used, as well as four sub-treatments (fertilization levels) with four repetitions, based on nitrogen (urea), potassium (muriate of potassium) and Zinc (Zinquell). The divided plot design, with three treatments, four sub-treatments, and four repetitions was used. The Duncan's Multiple Range Test, at 5 % probability, was utilized for the comparison of variables’ averages. Based on the results obtained in this study, it can be concluded that for plant height, panicle length, flowering, and crop maturation, high statistical significance was obtained for genetic material; the number of stalks per m², and grains per panicle had a 95% significance, both for genetic material and for fertilization; while the control with no fertilization reached only 2.47 ton /ha. The soil was mainly lacking in nitrogen, and to a lesser extent in K and Zn. In terms of grain quality, the GO39845 with peeled rice surpassed the line by 68%, and the soil chemical analysis was a good tool for crop fertilization.