Nutrientes (K, P, Ca, Na, Mg e Fe) em sedimentos (solos aluviais) e cultivares (feijão e milho) de praias e barrancos de rios de água branca: a bacia do purus no estado do Acre, Brasil

Abstract

The present research highlights the macronutrient abundance in the sediments of beaches and cliffs and cultivates in the river Purus and flowing, southwest of Amazon. The concentrations found in leaves and bean seeds and corn leaves reflect the mineralogical and chemical nature of those rich sediments in K 2 O and Na 2 O, which are formed by smectite, illite and K-feldspar. The factors of transfer of the elements in the corn leaves and bean (Ca>K>Na) and bean seeds (Na>K>Ca) demonstrate that the nutrient needs of the cultivate were found appropriately in the sediments (soils) of the beaches and cliffs.

Natural nodulation of cowpea plants in lowland soil in south-western Amazonia

“…In the state of Acre, farmers use lowland areas along muddy rivers, such as beaches and ravines, for the cultivation of short cycle crops, especially beans and maize (MARTINS;COSTA, 2009). According to Mattar et al (2016), the "beach growing Scientia Naturalis, Rio Branco, v. 3, n. 5, p. 2030Branco, v. 3, n. 5, p. -2035Branco, v. 3, n. 5, p. , 2021Branco, v. 3, n. 5, p. p. 2031 system" is predominantly used in traditional agriculture and has the potential to be classified as organic.…”