Influences of Soil Texture and Temperature on the Regeneration of the Brazilian Savannah in the Ecological Station of Jataí - Luiz Antônio / SP-Brazil

Abstract

Several works highlight the importance of the Brazilian Savannas (Cerrado) as a global biodiversity hotspot. It is among the 27 critical biodiversity areas of the planet and is in continuous threat, mainly due to the indiscriminate use and occupation of its lands, mainly by the agricultural sector. In view of this, important public policies are created with the purpose of promoting the conservation, recovery and sustainable management of this biome. However, these objectives run counter to the lack of technical studies, making it difficult to properly target funds and actions. Thus, in order to provide subsidies to these, the present work aimed to measure diurnal oscillations of soil temperature and its relationships with vegetation regeneration. The study is exploratory, based on a bibliographical and experimental survey, from soil samples collection, laboratory analyzes and field temperature measurements. The activities were developed in two points inside the Ecological Station of Jataí - SP / Brazil. The results allowed to verify greater diurnal temperature variations in the first 20cm of the soil characterized by lower clay content. These data can indicate impacts on the seed dormancy and the development of roots of small seedlings, hindering the regeneration process. Thus, the information presented can contribute to the development of public policies to recover this type of vegetation.