Objetivou-se com este trabalho avaliar o teor de clorofila nas folhas, de potássio nos pecÃolos da mamoneira, a
análise fÃsica do solo e os teores de macronutrientes presentes nas folhas da mamoneira cultivada com doses
crescentes de torta de mamona e nÃveis diferentes de densidade do solo. O experimento teve inÃcio no perÃodo de
02 de maio de 2006 e se estendeu até 02 de setembro de 2006, em casa-de-vegetação, sem controle de ambiente,
do Centro Nacional de Pesquisa do Algodão (CNPA/Embrapa), em Campina Grande, Estado da ParaÃba.
Utilizou-se no experimento o delineamento experimental em blocos casualizados, em esquema de análise fatorial
(4 x 4), com 3 repetições, sendo os fatores: quatro graus de densidades do solo (1,4; 1,6; 1,8 e 2,0 kg.dm-3 ) e
quatro doses de torta de mamona (0,0; 2,0; 4,0 e 6,0 t ha -1). As variáveis analisadas no experimento foram o teor
de clorofila nas folhas, de potássio nos pecÃolos da mamoneira, a análise fÃsica do solo e os teores dos
macronutrientes presentes nas folhas dessa oleaginosa. A torta de mamona, importante co-produto da cadeia
produtiva da mamoneira, por ser rica em Nitrogênio e Fibras, respondeu positivamente as variáveis estudadas. A
compactação do solo afetou a absorção de nutrientes nas folhas das plantas.
It was Aimed at with this work to evaluate the chlorophyll tenor in the leaves, of potassium in the pecÃolos of the
castor beans, the physical analysis of the soil and the tenors of the present macronutrientes in the leaves of the
castor beans cultivated with growing doses of castor oil plant pie and degrees different from density of the soil.
The experiment had beginning in the period of May 02, 2006 and he/she extended to September 02, 2006, in
house-of-vegetation, without atmosphere control, of the National Center of Research of the Cotton
(CNPA/Embrapa), in Campina Grande, State of ParaÃba. It was used in the experiment the experimental
delineamento in blocks casualizados, in outline of factorial analysis (4 x 4), with 3 repetitions, being the factors:
four degrees of densities of the soil (1,4; 1,6; 1,8 and 2,0 kg. dm-3) and four doses of castor oil plant pie (0,0;
2,0; 4,0 and 6,0 t has -1). The variables analyzed in the experiment they were the chlorophyll tenor in the leaves,
of potassium in the pecÃolos of the mamoneira, the physical analysis of the soil and the tenors of the present
macronutrientes in the leaves of that oleaginous one. The castor oil plant pie, important co-product of the
productive chain of the castor beans, for being rich in Nitrogen and Fibers, answered the studied variables
positively. The compactação of the soil affected the absorption of nutrients in the leaves of the plants.
