Incidencia de enfermedades en el cultivo de arroz en hidroponía (Oryza sativa L.), tratado con diferentes niveles de fertilización nitrogenada

VIII. SUMMARY The present research work was carried out in the premises of the Faculty of Agricultural Sciences of the Technical University of Babahoyo, located at km. 7.5 of the Babahoyo-Montalvo road. The geographic coordinates (UTM) are X: 668690 E; Y:9801098 N. The zone presents a humid tropical climate, with an average temperature of 24 to 26 ° C, relative humidity 88%, annual precipitation of 1262 mm, a height of 10 msnm and 990 hours of annual average heliophany. Seeds of rice, variety INIAP 14, were used as seed material. The treatments consisted of different levels of nitrogen such as: 200, 250, 300 and 350 ppm; a control treatment without application of the product. The experimental design Randomized with four treatments and 3 repetitions was used, the test of significance used was Tukey at 95% probability. All the necessary agricultural work was done in rice cultivation for its normal development, such as the preparation of the boxes, with nutritious solutions, planting, irrigation, fertilization, weed control, phytosanitary control and harvesting. To estimate the effects of the treatments, the following data were taken: plant height, number of tillers, length and width of the flag leaf and leaf 2 (cm), chlorophyll levels, root length (cm), fresh biomass of the root (g), dry biomass of the root (g), fresh biomass of the aerial part (g), dry biomass of the aerial part (g), evaluation of diseases. For the results obtained it was determined that with high levels of nitrogen there is a higher incidence of diseases since with the highest dose (T4 350 ppm), 3.08 was presented for pyricularia and 2.87 for helmitosporium. In addition, nitrogen deficiency can also have a negative effect on the susceptibility of rice in the presence of diseases. Since the control treatment, without application of nitrogen, presented considerable levels of incidence, with 2.58 for pyricularia, 2.96 for helmitosporium and 2.28 for rhizoctonia.

• Príomhchruthaitheoir: Acosta Orozco, Christopher Rodolfo (author)
• Formáid: bachelorThesis
• Teanga: spa
• Foilsithe / Cruthaithe: 2019
• Ábhair: Niveles de nitrógeno; Enfermedades; Incidencia
• Rochtain ar líne: http://dspace.utb.edu.ec/handle/49000/5646