Maneio de salinidade do solo para uma agricultura sustentável no campo experimental da Escola Superior de Desenvolvimento Rural no Distrito de Vilankulo, localidade de Pambarra

Abstract

The present study was developed with the objective of improving soil conditions reducing salinity for crop production on the banks of the Govuro River, in an area where the water table is close to the soil surface ranging from 40 to 90 cm deep. To achieve the research objectives mulching was applied to decrease the evaporation of water in the soil in 4 levels of namely 0 t/ha, 3 t/ha, 6 t/ha and 12 t/ha causalized in 16 plots corresponding to 4 rows and 4 columns of the Latin square arranged parallel to the river side. A line was demarcated with the area covered by natural vegetation next to the experimental to compare the effects between the applied treatments and between columns of the on soil salinity and moisture. Regular and uniform irrigation was applied to the soil, and thereby washing salts from the upper to the lower soil layers. For the diagnosis of the effects of the applied treatments (mulching) six samplings were made, the first before application of the treatments and beginning of irrigation and the others at intervals of 10 to 15 days. of 10 to 15 days. With the results obtained it can be concluded that the efficiency of the desalination depends on the amount of mulching to be adopted. The mulching level of 12 t/ha had greater effects with salinity reduction trends among the mulching levels applied, but there were no there were differences among treatments in the effect of soil moisture at almost all mulching levels, but there were significant mulching, but there were significant differences in effects among columns on moisture maintenance moisture according to their arrangement relative to the river. Salinity and moisture decrease with increasing depth, and salinity tends to increase as one approaches the river. to the river. (TRADUÇAO NOSSA)