Características morfogênicas e estruturais da Brachiaria brizantha cv. Marandu submetida a diferentes doses de nitrogênio e freqüências de cortes

Autor:	Domicio do Nascimento Júnior, Adair José Regazzi, Paulo Roberto Mosquim, Daniel de Paula Souza, Emerson Alexandrino, Fernanda Cipriano Rocha
Rok vydání:	2005
Předmět:	Every Two Weeks biology Randomized block design food and beverages chemistry.chemical_element biology.organism_classification Nitrogen Brachiaria Animal science chemistry Agronomy Plant morphology Leaf size Agronomy and Crop Science
Zdroj:	Acta Scientiarum. Agronomy. 27
ISSN:	1807-8621 1679-9275
DOI:	10.4025/actasciagron.v27i1.1902
Popis:	Morphogenic and structural traits of Brachiaria brizantha cv. Marandu submitted to different levels of Nitrogen and frequency harvest. Leaf appearance rate (LAR), leaf elongation rate (LER), average leaf size (ALS) and tillers density (TD) of Brachiaria brizantha cv. Marandu, submitted to different levels of nitrogen - (N) (0, 45, 90, 180 e 360 mg dm -3 ) and frequency harvest (F1 = cuts every 14 days and F2 = cuts in every 28 days) were evaluated, in a randomized block experiment, disposed in pots in a greenhouse. There was no significant effect of the interaction between frequency harvest and the levels of N on LAR. However, it was increased according to the increase of the frequency harvest and to the nitrogen levels. The effect of nitrogen levels was significant on LAR. Only the effect of the interaction between the frequency harvest and the levels of nitrogen on ALS and TD was not significant, being the effect of the frequency harvest negative and the effect of the nitrogen levels positive on ALS. Defoliation in every two weeks was extremely stressor debilitating the plants, which was eased with high supply of nitrogen.
Databáze:	OpenAIRE
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