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Este trabalho objetivou avaliar características fisiológicas, morfológicas e a produção de inflorescências em cultura de Calendula officinalis em função do fornecimento de cama-de-frango de corte semidecomposta. O experimento conduzido em Latossolo Vermelho distroférrico contou com quatro tratamentos, a testemunha, cama incorporada, cama em cobertura e cama em cobertura (50%) mais incorporada (50%) na dose 20 t ha-1. Empregou-se o delineamento experimental de blocos casualizados em parcelas subdivididas, com seis repetições. Os valores de matéria fresca e seca dos capítulos florais decresceram com o tempo de cultivo. As formas de fornecimento da cama-de-frango não interferiram na síntese de clorofila (44,812 µg cm-2), no metabolismo fotossintético (20,938 µmol m-2 s-1) e na transpiração das plantas (6,750 Mmol m-2 s-1), com valores mais elevados aos 112 dias após o transplantio. A maior produção total de capítulos foi observada sob cultivo com cama-de-frango 50% incorporada e 50% em cobertura (1361,16 kg ha-1) e a menor no tratamento testemunha (939,28 kg ha-1). This study aimed to evaluate physiological and morphological characteristics of inflorescences in culture of Calendula officinalis according to the supply of semi-decomposed poultry manure. The experiment was conducted in dystrophic Red Latosol and included four treatments: control, incorporate litter, cover litter and cover (50%) incorporated (50%) litter at the level 20 t ha-1. The randomized split-plot block design was adopted, with six replicates. The values of fresh and dry matter of capitula decreased with the cultivation time. The forms of chicken manure supply did not interfere with chlorophyll synthesis (44.812 µg cm²) and photosynthetic metabolism (20.938 µmol m-2 s-1) and plant transpiration (6.750 Mmol m-2 s-1), with the highest values at 112 days after transplanting. At 126 days after transplanting, the highest production of capitula (16.0 capitula plant -1) was verified for the treatment cover (50%) incorporated (50%) litter, with the highest diameter (46 to 50mm) incorporated. The highest total production of capitula was observed for cultivation with 50% incorporated and 50% cover poultry manure (1362.16 kg ha-1) and the lowest production was noted for the control treatment (939.28 ha-1)

Formas de aplicação de cama-de-frango no crescimento e produção de capítulos florais de Calendula officinalis L.