Jorge-Mustonen, P.S. and Oelbermann, M. and Kass, D.C.L.
(2013)
Production of Phaseolus vulgaris L. Genotypes with
Tithonia diversifolia (Hemsl.) Gray and
Cajanus cajan (L.) Millsp.
Agronomy, 3.
pp. 232-247.
Abstract
Adding mulch biomass prior to crop seeding may improve production of tropical
soil. We evaluated the response of four bean (Phaseolus vulgaris L.) genotypes to the
addition of mulch biomass from Tithonia diversifolia (Hemsl.) Gray and Cajanus cajan L.
Millsp. The addition of mulch did not result in significant differences (p < 0.05) in soil
characteristics when compared to a control (no mulch addition) except for soil potassium
(K), which was significantly greater (p < 0.05) in the T. diversifolia mulch biomass
treatment. Bean yield and shoot biomass were significantly greater (p < 0.05) in the mulch
biomass treatments compared to the control (no biomass added). In these treatments,
Phosphorus (P)-efficient bean genotypes had a significantly greater (p < 0.05) yield and
shoot biomass. Bean shoot nutrient concentrations were significantly different (p < 0.05)
between mulch biomass treatments and between bean genotypes (P, K and magnesium
(Mg) only). Phosphorus utilization and uptake efficiencies were significantly different
(p < 0.05) between mulch biomass treatments and between bean genotypes. Bean root
biomass was not significantly different (p < 0.05) between mulch biomass treatments, but
was significantly different (p < 0.05) between bean genotypes. The number of root nodules
was significantly greater (p < 0.05) in the T. diversifolia mulch biomass treatment and was
significantly different between bean genotypes.
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