Content of nutrients in the aerial parts and nutritional efficiency in <i>Mimosa caesalpiniifolia</i> Benth.

Abstract

The objective of this work was to know the content of mineral nutrients in components of the aerial part of trees of Mimosa caesalpiniifolia Benth. and to evaluate the efficiency of this species in the use of these nutrients. The research was developed in the Experimental Station of Itambé, PE, pertaining to IPA. Two populations of sabiá were studied and two representative trees, of each one of the six classes constituted from the diameter at breast height (DBH) of the trees, were cut for determination of the concentration, content and coefficient of biological use of nutrients (N, P, K, Ca, Mg e S). The experimental design was completely randomized, with three repetitions, in factorial arrangement 2 x 6, corresponding to the two populations and six  classes of DBH. The ligneous components accumulates more nutrient than leaves. Independent of the component of the plant, the nitrogen was the most accumulated nutrient, however, presented minor use efficiency. The efficiency of use of the nutrients in the plant presents the following sequence: P > S > Mg > K > Ca > N.