Desempenho agronômico do milho (Zea mays L.) sob influência de bioestimulantes Trichoderma harzianum.

Abstract

Corn is one of the main cereals produced in the world, acting as a base for human and animal food, in addition to being used in various industrial items. The use of biological products is growing daily in order to mitigate the environmental impacts of agrochemicals. Biostimulants, composed of organic substances, promote the vigorous development of plants, contributing to more ecological production. In view of the above, the objective of this work was to evaluate the development of the BRS 2022 corn cultivar due to the application of biostimulants and Trichoderma harzianum, cultivated in the semi-arid region of Paraíba. The experiment was conducted from March to June 2024, in the experimental area of LAFISA, linked to CDSA/UFCG, campus of Sumé – PB, located in the micro-region of Cariri Oeste. For the application of biostimulants and T. harzianum, two foliar applications were made via spraying between vegetative stages five (V5) and seven (V7) of the plants, where between the first and second application of biostimulants and T. harzianum occurred 10 days, establishing a dosage of 10 ml of each product, which would later be diluted separately in 5 liters of water, making a total of four (4) treatments and four (4) repetitions. 64 corn plants were added, divided into 16 plots, analyzing 4 plants from the central line of each plot. The commercial biostimulants used were Biozyme® and Booster® and the fungus Trichoderma harzianum, produced at LAFISA/CDSA. The variables analyzed were plant height (cm), stem diameter (cm), number of leaves and leaf area (cm²). The experimental design used in the research was a randomized block design (DBC). The data were subjected to variance assessment and the results obtained were subjected to three (3) evaluations and the Tukey mean test at 5% probability, using the Sisvar® statistical program. The results demonstrated that the use of the commercial biostimulant Booster® from the fungus Trichoderma harzianum is effective in increasing the height and leaf area of corn plants, with 180 cm and 177 cm for plant height and 600 cm² and 612 cm² for leaf area, respectively.