Efeitos de diferentes doses de esterco de gado, no desenvolvimento e no balanço nutricional de mudas do Angico (Anadenanthera macrocarpa) / Effect of different doses of manure of cattle, in the development and the nutritional rocking of changes of the Angico (Anadenanthera macrocarpa)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

The experiment was realized at Biology Experimental Station of Universidade de Brasilia, with the tree species Angico ( Anadenanthera macrocarpa), in a Red Latossolo and manure of cattle. The experimental delineation used was the blocks at random with six repetition and six treatments, in which the percentage of manure used in each treatment was 0% (testify), 10%, 20%, 30%, 40% e 60%. The objective of search was verify the effects of different doses of manure of cattle, in the development and in the nutritional balance of seedling of Angico, through the variables: mass of dry matter, height and the contents of nutrients of leaves. Another objective is subsidize recovering plans, conservation and handle of various biomes where this species occurs. The production of dry matter from the tops of trees, roots and whole plants, and the height of seedling were submitted to the multiple regression. The efficiency in the use of manure of cattle for the composition of substrate with Red Latossolo starts to decrease with the increase of the doses, from the maximum points of 34, 7% e 34,5% for dry mass of the tops and the dry mass of whole plants, respectively. In the dry mass from the roots, the efficiency of fertilization starts to reduce from the dose of 33,9%. For the height of the plant at the forty and a hundred twenty days, there was a significative effect between the treatments, where the efficiency of fertilization starts to reduce from the dose of 36,3% in both ages. The evaluation of nutritional state of angico demonstrated that all the concentration averages of nutrients in the leaves is inside the limits of sufficiency, however, the nutrients that contributed more for the production of dry matter in the seedling of angico were the sulphur and the potassium. The dose of manure of cattle that obtained the higher production of dry matter among the treatments stayed above of seedling reference (13,15g/seedling), was 30%, and the nutrients with higher probability to answer to the fertilization, according to the foliage analysis were: Mn (23,8%) >Cu (19,0%) >Mg (16,7) >Fe (14.3%) >K (9,5) >Ca =B (4,8%) >N = P = Zn (2,4%). The Nutritional Balance Rating (INB) have not presented significative correlation to the productivity

ASSUNTO(S)

produção de mudas anadenanthera macrocarpa substrato anadenanthera macrocarpa dris dris seedling production dry matter ciencias agrarias substrate matéria seca

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