Produção de cará em função de fontes orgânicas de adubação

Abstract

ADRIANO TAKECHI SUMIOKA 2 RESUMO -Avaliou-se neste trabalho a resposta do cará (Dioscorea alata L.), clone Mimoso, a fontes e doses de adubos orgânicos, em um Latossolo Roxo distroférrico, textura argilosa pesada, situado em Dourados-MS. Utilizou-se o delineamento experimental de blocos casualizados com três repetições. Os tratamentos foram arranjados no esquema fatorial 4 x 3, formados por quatro níveis de adubação orgânica (0, 1, 2 e 3).,em relação às três fontes (composto orgânico, composto enriquecido e cama de frangos). Os níveis 0, 1, 2 e 3 corresponderam a 0, 3, 6 e 9 t.ha -1 de matéria seca para o composto orgânico e a cama de frangos e a 0, 2, 4 e 6 t.ha -1 de composto enriquecido. Pelos resultados da aná-lise estatística, verificou-se que os adubos não aumentaram a produtividade de rizomas, que variou entre 17 e 25 t.ha -1 , porque o solo da área experimental apresentava níveis de fertilidade satisfatórios para as necessidades nutricionais do cará. Contudo, esses adubos aumentaram a produção de rizomas entre 150 e 600 g, que são bem cotados para a comercialização. TERMOS PARA INDEXAÇÃO:Cará, adubação orgânica, nutrição e adubação. YAM PRODUCTION IN FUNCTION OF ORGANIC SOURCES OF MANURINGABSTRACT -In this work was evaluated the response of yam (Dioscorea alata L.), Mimoso clone, to sources and dosis of organic manures. The sowing was established in 1998, november, on a dark clay texture distroferric Eutrustox soil, planted with vegetables in last years. It was utilized a ramdomized block experimental design with three replications. The treatments were arranged in fatorial scheme, formed by four organic manuring levels (0, 1, 2 and 3), in relation to three sources (organic compost, enriched compost and bed of chicken manure). The Levels 0, 1, 2 and 3 were corresponded to 0, 3, 6 and 9 t.ha -1 in dry matter, of organic compost and bed of chicken manure and to 0, 2, 4 and 6 t.ha -1 of enriched compost. The results indicated that manures don't elevated the rizomes yield, which varied from 17 to 25 t.ha -1

Yield and nutrition of tomato using different nutrient sources

“…In the case of low-solubility sources, the availability of nutrients can be enhanced by adding these sources in the composting process of organic waste. According to Rodrigues & Sumioka (2003), Alcantara et al (2000) and Araújo & Almeida (1993), the composting process increases the available forms of nutrients to plants. However, in this study, no difference was found among the treatments in which rock-dust and phosphate were applied alone or together with organic wastes for composting (Table 3).…”

PRODUCTION OF CARÁ-ROXO (Dioscerea trifida L.f.) CULTIVATED UNDER DIFFERENT DOSES OF ORGANIC AND PHOSPHATE FERTILIZATION IN THE MUNICIPALITY OF ITACOATIARA – AM

“…The only variable that showed a difference was the length of tuberous roots (CRT), at the level of 160 kg/ha, which obtained better averages compared to the others, being the treatment that presented the length of tuberous roots to 155.75 mm. It is believed that this result may be directly linked to the plant's efficiency in the use of nutrients, with, in many cases, natural levels of soil fertility being sufficient to result in high productivity responses (RODRIGUES, 2003).…”