Morfogênese de aveia preta submetida a doses de nitrogênio com adubação orgânica

Abstract

Organic compounds are an alternative to reduce the use of chemical fertilizers in the fertilization of pastures in southern Brazil. Therefore, we studied the morphogenetic and structural characteristics of black oat (Avena strigosa) Cv IPR 61 under nitrogen levels come from poultry litter. The experiment was conducted in the experimental area of UTFPR Campus Dois Vizinhos .Using the design of randomized blocks with five treatments being; 0; 50; 100; 150 and 200 kg N ha-1, corresponding respectively to 0; 2.2; 4.4; 6.6 and 8.8 t ha-1 chicken litter with plots set in 4 m², three repetitions of the area, and split plot (three periods throughout the production cycle oats). Seeding had oat density 80 kg ha-1 with a spacing of 17 cm between rows, the application in the litter was given immediately after sowing, after 90 days of composting. The oat was cut 10 cm above the ground where one of the portions was 30 cm, the next day the cutting tillers were scored ten randomly in each plot, with the aid of colored thread. Thus originated the variables, number of green leaves, growing, mature and senescent, appearance rate and leaf senescence, phyllochron, longevity and growth leaf / stem. The count of the sheets was performed twice a week, until the food reaches the cutoff point once again. The TApF was similar between N doses, with no significant interaction between doses and periods, the same trend was observed for the phyllochron not being influenced by poultry litter doses.