Decomposition dynamics and nutrient release by pigeon pea genotypes under alley cropping

Authors

  • Gustavo Porto Salmi
  • Alexandre Porto Salmi
  • Antônio Carlos de Souza Abboud

DOI:

https://doi.org/10.1590/S1678-3921.pab2006.v41.7191

Keywords:

Cajanus cajan, green manuring, biomass, nitrogen, phosphorus, potassium

Abstract

The objective of this research was to evaluate the aerial biomass, N, P and K contents, and the dynamics of decomposition and mineralization, in six genotypes of pigeon pea, grown as hedgerows in an alley cropping system. Dry biomass production averaged 5.9 Mg ha-1; N content ranged from 188.3 to 261.3 kg ha-1; P content, from 7.2 to 9.4 kg ha-1 and K content, from 29.3 to 45.5 kg ha-1. No differences between genotypes were found. Decay curves indicated a rate of 75% of the biomass still remaining 30 days after deposition. Also, approximately 60% of N, and 65% of P and K, of the remaining biomass, were released to soil. No effects of pigeon pea genotypes were found in decomposition or mineralization rates.

Published

2006-04-01

How to Cite

Salmi, G. P., Salmi, A. P., & Abboud, A. C. de S. (2006). Decomposition dynamics and nutrient release by pigeon pea genotypes under alley cropping. Pesquisa Agropecuaria Brasileira, 41(4), 673–678. https://doi.org/10.1590/S1678-3921.pab2006.v41.7191

Issue

Section

SOIL SCIENCE