CAN THE PHYSICOCHEMICAL CHARACTERISTICS OF THE SOIL OF THE COASTAL PLAIN OF THE BRAZILIAN STATE OF RS INTERFERE IN THE NUTRITIONAL VALUE OF PUITA INTA CL RICE?

• DOI: 10.22533/at.ed.84519260425

• Palavras-chave: Atena

• Keywords: Oryza sativa, Coastal Plain, soils, nutrients.

• Abstract:

  Rice (Oryza sativa) is one of the

  most consumed foods in the world, being one

  of the most important grains in global economic

  terms. This research was to evaluate if the

  physicochemical characteristics of the soil in

  rice fields of the Internal and the External

  Coastal Plain of the Brazilian State of RS

  have the potential to modify the nutritional

  value of the rice cultivar PuitaInta CL. This

  study evaluated the nutritional composition,

  the total phenolic compounds content and

  the antioxidant activity of brown and polished

  grains of PuitaInta CL rice from two different

  areas. Samples were collected during two crop

  years.The nutritional content, phenolic content

  and antioxidant content were tested by the

  Mann Whitney method, in which samples are

  compared, obtaining the result that brown rice

  and polished rice have different characteristics,

  depending on the place where it is cultivated (p

  <0.001), and that there is no temporal difference

  (p> 0.05). The 18 physicochemical variables

  were analyzed by principal component analysis

  (PCA), followed by MANOVA. Results from PCA

  showed that the first three axes explain 74.19%.

  The first axis (47, 12%) includes the variables:

  regions, phosphorus, pH, potassium saturation,

  calcium / magnesium ratio, clay and organic

  matter. The second axis (15.79%) includes:

  calcium / potassium ratio and effective electron

  exchange capacity. The third axis includes: (11,

  28%) potassium. The resulting spatial pattern

  shows a significant difference between the soils

  of each region as demonstrated by MANOVA

  (Wilk’s Lambda: 0.008, p <0.0001 and F = 61.6).

• Número de páginas: 15