Mudas de campim Vetiver em condições de campo para o uso como bioengenharia no controle da erosão na região de Gilbués

Abstract

Erosive processes in populated regions have become a worrying environmental problem in many Brazilian municipalities, as they not only limit the expansion of urbanization, but also result in environmental and social problems. Soil bioengineering is a technique to help in the rehabilitation of degraded soils, being viable and low-cost, in addition to favoring environmental aspects. Vetiver grass (Chrysopogon zizanioides L. Roberty) presents itself as a good alternative in the practice of bioengineering, as it has good survival capacity, due to its deep root system, it does not have fertile seeds, a characteristic that makes it a noninvasive plant and has great soil stabilization capacity. The present study aimed to evaluate and describe the development of vetiver grass seedlings in a Quartzarene Neosol. For this, 327 seedlings were cultivated in a marsh, located in the urban area of the city of Gilbués, PI. At 15 days after implantation (DAT), evaluations of the variables began: percentage of survival; seedling height; number of leaves and stem diameter. Initially, assessments were carried out biweekly and then weekly. From 45 days DAT onwards there was a decrease in seedling survival, height and number of leaves. After 60 DAT, although the survival rate continued to decrease, the height and number of new leaves began to develop positively. In the end, the survival rate was between 2% and 5%. The diameter of vetiver grass seedlings did not increase. Despite the research showing timid development and a low survival rate, it is believed that it is possible to implement vetiver grass in Quartzarenic Neossolo in the municipality of Gilbués, since factors such as fertilization and soil watering may have influenced this result, the work showed advances in the development of transplanted seedlings, thus presenting a possibility of recovering degraded areas