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- Title
Quantos dias após a desfolha deve-se adubar com nitrogênio o capim BRS Ipyporã?
- Authors
Avelino CABRAL, Carlos Eduardo; Gimenes MOTA, Lucas; Delguingaro GOMES, Lucas; Guimarães da SILVA, Paulo Henrique; Domingues DUARTE, Camila Fernandes; Avelino CABRAL, Carla Heloisa
- Abstract
Fertilizing with nitrogen at the right time is very important to avoid losses, as these nutrient increases forage mass and grass growth rates. The objective was to identify the best time after defoliation to fertilize nitrogen in BRS Ipyporã grass (a hybrid of Bachiaria brizantha and Brachiaria ruziziensis). The experiment was carried out in a greenhouse at the Federal University of Rondonópolis in a completely randomized design, with four moments of nitrogen fertilization: 0, 3, 6, and 9 days after defoliation. Experimental units consisted of pots with a capacity of 5.0 dm³ and the soil used was clayey Oxisol. Two evaluations were carried out, which consisted of measuring the number of leaves, tillers and forage harvesting when the forage reached the handling height of 30 cm. In the roots, nitrogen, soluble carbohydrates and starch levels were measured. The fertilization time of BRS Ipyporã grass influenced only the mass of dead material, so by increasing the fertilization interval, there was a decrease in this variable. Thus, it is likely that fertilization carried out close to defoliation accelerates plant development, which anticipates senescence. In roots, statistically, no changes were observed in the contents of soluble carbohydrates and starch. As starch content was not altered, it can be inferred that grass did not suffer stress due to the fertilization times or could recover from the stress that occurred soon after defoliation. Thus, BRS Ipyporã grass can be fertilized with nitrogen up to 9 days after defoliation. This flexibility regarding the timing of fertilization is associated with the nitrogen content in the roots, which was sufficient to maintain the BRS Ipyporã grass for up to nine days after defoliation without nitrogen fertilization.
- Publication
Nativa, 2023, Vol 11, Issue 4, p448
- ISSN
2318-7670
- Publication type
Article
- DOI
10.31413/nat.v11i4.15107