IIIInoculação e adubação nitrogenada sobre a nodulação e a produtividade de grãos de feijão-caupi ABSTRACT The aim of this research was to evaluate the influence of inoculation and nitrogen fertilization on nodulation and grain yield of cowpea. The experiment was carried out in an experimental area in Parnaíba, PI. The treatments were disposed in a completely randomized block in factorial designof 5 x 2, consisted of five N levels (0, 20, 40, 80 and 160kg ha -1 N) and two microbiological treatments (with and without inoculation). In the treatment with inoculation, an inoculant was used containing
The effect of potassium levels (0, 15, 30, 45 and 60 mg of K/dm3) on dry matter (DM) yield and chemical composition of Panicum maximum cv. Mombaça, was evaluated under greenhouse with natural conditions of light and temperature. Potassium fertilization significantly (P
RESUMO O objetivo deste trabalho foi avaliar a ontogenia da nodulação em duas cultivares de feijão-caupi. O experimento foi conduzido em casa de vegetação utilizando-se as cultivares "BRS-Guariba" e "BRS-Marataoã 10, 20, 30, 40, 50, 60 and 70
The use of microorganisms to improve the availability of nutrients to plants is of great importance to agriculture. This study aimed to evaluate the effect of triple inoculation of cowpea with arbuscular mycorrhizal fungi (AMF), plant growth-promoting bacteria (PGPB) and rhizobia to maximize biological nitrogen fixation (BNF) and promote plant growth. The experiment was conducted in a greenhouse using
Eng. Agron., MS., Doutorando em Agronomia (Produção Vegetal) pelo convênio DINTER entre a UNESP/Jaboticabal-SP e a UFPI/ Teresina-PI. E-mail: fluisga@yahoo.com.br 3 Eng. Agron, Dr., Professor Adjunto do Departamento de Tecnologia da FCAV/UNESP, Jaboticabal. Via de acesso Prof. Paulo Donato Castellane, s/n, 14.884-900, Jaboticabal-SP. E-mail: cazetta@fcav.unesp.br 4 Eng. Agron., MS., Doutoranda em Agronomia (Ciência do Solo), FCAV/UNESP, Jaboticabal-SP. E-mail: teferxa@hotmail.com ADUBAÇÃO FOSFATADA NO MELOEIRO-AMARELO: REFLEXOS NA PRODUÇÃO E QUALIDADE DOS FRUTOS 1 FRANCISCO LUIS GONÇALVES DE ABRÊU 2 , JAIRO OSVALDO CAZETTA 3 , TEREZINHA FERREIRA XAVIER 4 RESUMO -O melão (Cucumis melo L.) é uma das culturas de grande expressão econômica e social para a região Nordeste do Brasil. Apesar disso e dos baixos níveis de fósforo (P) dos solos tropicais, existem poucas pesquisas sobre adubação com P nesta cultura, embora seja frequentemente mencionado que este nutriente tem papel preponderante na produção e qualidade dos frutos. Neste contexto, objetivou-se com este trabalho avaliar o efeito de doses de P (0; 120; 240; 360 e 480 kg ha -1 de P 2 O 5 ), na produção e qualidade do melão-amarelo híbrido Goldex F 1 , nas condições ambientais de Teresina -Piauí. O experimento foi conduzido em um delineamento de blocos ao acaso, com quatro repetições, tendo 40 plantas por parcela. Os frutos foram colhidos aos 75 após o plantio. Foram avaliados os dados médios da produção total, produção de frutos comerciais, massa e número de frutos por planta, comprimento e diâmetro de frutos, espessura da polpa de frutos, sólidos solúveis, acidez titulável e o índice de maturação. A produção total e comercial, assim como a massa e o número de frutos e acidez titulável aumentaram com as doses de P aplicadas até a dose de 278 kg ha PHOSPHORUS FERTILIZATION ON MELON: REFLEXES ON FRUITS PRODUCTION AND QUALITYABSTRACT -The culture of melon (Cucumis melo L.) has a great economic and social expression for the Northeast region of Brazil. Although its importance in the Brazilian agriculture, and the low levels of phosphorus (P) on tropical soils, there are reduced number of researches regarding P fertilization for this culture, even though is frequently mentioned that this nutrient would have preponderant rules on the development, growth and quality of the fruits. Thus, the objective of this study was to evaluate the effect of P doses on the production and quality of yellow cantaloupes, hybrid Goldex F1, growing under Teresina-PI conditions. The experiment was composed by 5 P doses (0, 120, 240, 360 and 480 kg ha -1 of P 2 O 5 ), carried out in four randomized blocks design. The fruits were harvested at 75 days after planting, and evaluated the total production; production of commercial fruits; mass and number of fruits per plant; length and diameter of fruits; pulp thickness, soluble solids, acidity and maturation index. The results indicated that the total and commercial production, mass and number of fruits as well as acidity increas...
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