Effect of the sowing date on the growth of hairy vetch (Vicia villosa) as a cover crop influenced the weed biomass and soil chemical properties in a subtropical region

Weeds emerge throughout the year in agricultural fields in subtropical regions. The weed suppression and improved soil fertility resulting from a living mulch of hairy vetch were investigated. Hairy vetch was sown in October and in December 2006. The fallow condition was without the sowing of hairy...

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Bibliographic Details
Published in:Weed biology and management 2009-06, Vol.9 (2), p.129-136
Main Authors: Anugroho, F.(Kagoshima Univ. (Japan)), Kitou, M, Nagumo, F, Kinjo, K, Tokashiki, Y
Format: Article
Language:English
Subjects:
ABSORCION DE SUSTANCIAS NUTRITIVAS
ABSORPTION DE SUBSTANCES NUTRITIVES
BIOMASA
BIOMASS
BIOMASSE
COVER PLANTS
CUBRIMIENTO DEL SUELO
DATE DE SEMIS
EXPERIMENTACION EN CAMPO
EXPERIMENTATION AU CHAMP
FECHA DE SIEMBRA
FIELD EXPERIMENTATION
MULCHING
NUTRIENT UPTAKE
PAILLAGE
PLANTAS DE COBERTURA
PLANTE DE COUVERTURE
PROPIEDADES FISICO - QUIMICAS SUELO
PROPRIETE PHYSICOCHIMIQUE DU SOL
SOIL CHEMICOPHYSICAL PROPERTIES
SOWING DATE
subtropical region
SUBTROPICAL ZONES
VICIA VILLOSA
Vicia villosa Roth
weed
ZONA SUBTROPICAL
ZONE SUBTROPICALE
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Summary:Weeds emerge throughout the year in agricultural fields in subtropical regions. The weed suppression and improved soil fertility resulting from a living mulch of hairy vetch were investigated. Hairy vetch was sown in October and in December 2006. The fallow condition was without the sowing of hairy vetch, with the weeds allowed to grow naturally. The biomass of the top parts (BOT) of hairy vetch increased from February to April and then decreased in May on both sowing dates. The BOT of hairy vetch sown in October was significantly higher in February, March, and April than that sown in December. Hairy vetch sown in October and harvested from February to April varied from 372–403 × 10−3 kg m−2, with weed suppression percentages of 62.8% in comparison with the fallow plots. The fixed C, N, P, and mineral uptake of hairy vetch showed similar patterns to its biomass. The nitrate (NO3‐N) content increased from February to May for the soils in the October and December plots, in contrast to the fallow plots. Moreover, the NO3‐N and available N of the October and December soils sampled from February to May were higher than that of the fallow soils. In subtropical agriculture, hairy vetch should be sown in October in order to achieve a higher biomass for suppressing weeds effectively and improving the soil fertility, mainly N.
ISSN:1444-6162
1445-6664
DOI:10.1111/j.1445-6664.2009.00330.x