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O rabanete e uma planta de ciclo curto e o ambiente exerce grande interferencia na qualidade de suas raizes O efeito residual da adubacao anterior em cultivos subsequente e de suma importância, uma vez que a fertilizacao do solo em uma atividade tao intensa, como a olericultura, aumentaria o custo de producao sempre que fosse implantada uma nova cultura. Este trabalho foi conduzido na fazenda experimental Rafael Fernandes, pertencente a Universidade Federal Rural do Semi-Arido, Mossoro-RN, no periodo de julho a novembro de 2010. Objetivou-se avaliar a adubacao verde com especies espontâneas da caatinga no cultivo do rabanete em sucessao ao cultivo da rucula. O rabanete assim como a rucula foi plantado em parcelas de 1,2 x 1,2 m sendo avaliado o efeito residual das especies espontâneas da caatinga (Jitirana, flor-de-seda e mata-pasto) nas quantidades (0; 6,0; 12,0; 18,0; 24,0 e 30,0 t ha-1). Apos a retirada do primeiro cultivo, semearam-se sementes de rabanete nas parcelas referente aos tratamentos acima citados. O delineamento experimental foi em blocos casualizados com tres repeticoes, no esquema fatorial 6 x 3, sendo seis quantidades de adubos verdes e tres tipos de adubos verdes (jitirana; mata-pasto e flor-de-seda). A cultivar de rabanete plantado foi a Crimson Gigante. As caracteristicas avaliadas do rabanete foram: altura de planta, diâmetro de raiz; numero de folhas; produtividade comercial e raizes mais parte aerea. O efeito residual da quantidade 23 t ha-1 de adubo verde promoveu maior incremento na produtividade comercial e de raizes mais parte aerea, cujos valores maximos foram de 1,5 e 2,26 kg m-2 de canteiro, respectivamente. Green manuring with spontaneous species of the savanna in radish cultivation in succession to rocket Abstract : The radish is a short-cycle plant and the environment has great interference as its roots the residual effect of previous fertilization in subsequent crops is extremely important, since soil fertilization in such an intense activity, such as horticulture, increase the cost of production when a new culture was implanted. This study was conducted at the experimental farm Rafael Fernandes, belonging to the Universidade Federal Rural do Semi-Arido, Mossoro-RN, in the period from July to November 2010. The objective was to evaluate green manures with spontaneous species of the savanna in radish cultivation succession to the cultivation of arugula. Radish as well as the rocket was planted in plots of 1.2 x 1.2 m being evaluated the residual effect of spontaneous species of caatinga (scarlet starglory, fleur-de-silk and kill pasture) in the quantities (0, 6.0 ; 12.0; 18.0; 24.0 and 30.0 t ha-1). After removal of the first crop, seeded radish seeds in the portions regarding the above mentioned treatments. The experimental design was a randomized block design with three replications, in a factorial 3 x 6, six amounts of green manures and three types of green manures (scarlet starglory, kill grass and flower-de-silk). The cultivar planted radish was the Crimson Giant. The evaluated Radish characteristics were: plant height, root diameter; number of sheets; business productivity and more aerial roots. The residual effect of the amount 23 t ha-1 of green manure promoted greater increase in business productivity and more aerial roots that maximum values were 1.5 and 2.26 kg m-2 site, respectively.

Adubação verde com espécies espontâneas da caatinga no cultivo do rabanete em sucessão a rúcula