Tolerance of cerrado baru tree (Dipteryx alata) submitted to different doses of glyphosate
Palavras-chave:
herbicide, native, integration crop-livestock-forestryResumo
Baru tree (Dipteryx alata Vogel.) is a been an alternative to establish an Integration Crop-Livestock-Forestry Systems (ICLFS), combining native species preservation with sustainable food production. However, the management procedure of herbicides for weed control is one of the major limiting factors to include tree components within ICLFS. Thus, the study evaluated the tolerance of D. alata submitted to different concentrations of glyphosate on the plants, to make the introduction of this forest species in ICLFS. The treatments comprised different doses glyphosate: 0.0 (control); 960; 1920; 2880 and 3840 g a.e ha-1. Shoot height, stem diameter, shoot dry weight, root dry weight and total dry weight, as well as Dickson Quality Index and phytotoxicity were assessed. The phytotoxicity in plants varies according to the applied doses of glyphosate, with progressive yellowing in the leaves up to well-developed necrosis and leaf senescence in the highest doses. All doses tested reduced the biometric and qualitative attributes of D. alata seedlings, demonstrating that no treatment was selective, although the plants are tolerant at dose 960 g a.e ha-1 tested.
Increases in doses of glyphosate do not cause the death of seedlings D. alata that shows a great potential to compose ICLFS.
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