Fertilization via soil with boric acid in Dipteryx odorata (Aubl.) Willd. seedlings

Abstract Background and aims: The importance of boron (B) in the growth and development in native tree species are relevant to establish quality indexes for seedlings. The objective of the present study was to evaluate the effect of boron application on the development of Dipteryx odotara seedlings. Methods: The experimental design was a completely randomized design, five treatments with four replications. The treatments consisted of B doses, in the form of boric acid (17% of B), being: 0; 1.0; 10; 20 and 40 mg B kg-1. We evaluated the seedlings were at 60 days after transplanting. Results and Conclusions: The dose 1 mg B kg-1 and absence of application in Dipteryx odotara seedlings provided the highest values ​​of stem diameter, shoot height, root volume and dry mass of shoot, root and total. It also provided better quality indexes for seedlings: shoot height/shoot dry matter, shoot dry mass/root dry mass and Dickson quality index, did not show symptoms of B toxicity in plants. Unlike the other doses that affected the growth and development of Dipteryx odotaraseedlings.