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Nitrogen symbiotically fixed by cowpea and gliricidia in traditional and agroforestry systems under semiarid conditions PAB
Martins,Júlio César Rodrigues; Freitas,Ana Dolores Santiago de; Menezes,Rômulo Simões Cezar; Sampaio,Everardo Valadares de Sá Barretto.
The objective of this work was to estimate the amounts of N fixed by cowpea in a traditional system and by cowpea and gliricidia in an agroforestry system in the Brazilian Northeast semiarid. The experiment was carried out in a randomized complete block design, in a split-plot arrangement, with four replicates, in the semiarid region of the state of Paraíba, Brazil. Plots consisted of agroforestry and traditional systems (no trees), and split-plots of the three crops planted between the tree rows in the agroforestry system. To estimate N fixation, plant samples were collected in the fourth growth cycle of the perennial species and in the fourth planting cycle of the annual species. In the agroforestry system with buffel grass and prickly-pear cactus,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gliricidia sepium; Vigna unguiculata; Biological nitrogen fixation; Natural abundance; 15N..
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000200178
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