ORGANIC RESERVES, AEREAL PART:ROOT AND C:N RATIO AND ELIMINATION OF THE APICAL MERISTEM IN XARAÉS – GRASS UNDER NITROGEN AND POTASSIUM DOSIS
DOI:
https://doi.org/10.5216/cab.v8i3.1714Keywords:
Forragem, adubaçãoAbstract
The capacity of recovery of plants after takes away the leaves, depends amongst other factors, of the organic reserves and the remaining foliar area. It was objectified with this study, to quantify meaning of non-structural total carbohydrates (Tnc) and of total n, in the roots, base of stem and crown, to determine the relation has broken ae-rial/root and c/n and elimination of meristema apical in the Xaraés Grass (Brachiaria brizantha cv. Xaraés), submitted the rates of nitrogen and potassium. The experiment was lead in a greenhouse. The experimental treatments have consisted on a 4X3 combination. The nitrogen rates were 0; 75; 150 and 225 mg dm-3, whereas potassium rates were 0; 50 and 100 mg dm-3. Effect (P<0,05) of the rates of nitrogen in the increase of meaning of total n and the production of DM of the base of stem and root and reduction of Tnc meaning was observed, in the same ones, being the roots the storage organ. It had interaction (P<0.05) for the doses of n x K in relation c/n for all the organs reducing with the increase of the rates of the nutrients and rise in meaning of total n in the crown with the increase of the doses. The relation has broken aerial/root and elimination of meristema apical did not suffer effect (P>0.05) from no nutrient.
KEY-WORDS: Brachiaria brizantha, crown, total n, total nonstructural carbohydrates, roots, stem base.
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