Resumo

NARVAEZ-ORTIZ, Willian Alfredo; MORALES-DIAZ, América Berenice; BENAVIDES-MENDOZA, Adalberto  e  REYES-VALDES, Manuel Humberto. Dynamics of soil solution composition in crops from western Mexico. Rev. Mex. Cienc. Agríc [online]. 2015, vol.6, n.spe12, pp.2383-2397. ISSN 2007-0934.

The present study is a preliminary and descriptive approach to the phenomenon of the dynamic behavior of soil solution. The objective was to study the composition of the soil solution over time, to help the understanding of the availability of different ions, as well as their individual and collective behavior through correlation and principal component analysis (PCA). The work consisted in gathering information by repetitive sampling of the solution in different soil types under intensive production areas located in western Mexico (Jalisco and Colima) for five crops (avocado, cranberry, strawberry, papaya and pepper). The soil solution samples were collected every 15 days throughout the phenological cycle for the different crops; the samples were analyzed for nitrates (NO3-), potassium (K+), calcium (Ca2+), sodium (Na+) levels, pH and electrical conductivity (EC). The results of the correlations showed similar patterns with a decreasing behavior among different ions versus time. Loading vectors obtained by PCA showed similarity in their behavior in all crops except strawberry; however the dynamics from the principal component for all crops was similar showing concomitant variation over time with an ascending trend. This result indicates the feasibility to model in multivariate ways the dynamic behavior of the soil solution.

Palavras-chave : principal component; nutrient dynamics; soil solution.