Evaluation of three commercial herbaceous legumes, with and without poultry manure addition, for the early protection of burnt soils
Castro Padín, Arturo | González Prieto, Serafín Jesús | Carballas, Tarsy
Organic amendments combined with gramineous sowing are effective for early protection of burnt soils (BS), but insufficient to restore the pre-fire soil N status, leading to interest for their use combined with N2 fixer legumes. Usefulness of poultry manure (PM; 2 Mg ha-1) and legumes sowing (Lotus corniculatus, Lupinus polyphyllus and Trifolium repens) for early protection of BS was compared with that of PM + Lolium perenne and these four species without PM in a 3-month pot experiment, which also included a control unburnt soil (US). In US, shoots and roots biomass increased as follows: Trifolium . Lotus<<Lolium < Lupinus. Compared with those from US, plants from BS were smaller and weaker in three species (Lupinus, Lolium and Trifolium); the reverse was true for the four species in BS+PM, showing the benefits of PM addition. In all treatments, plant N uptake, which prevents soil-N losses, increased as follows: Trifolium . Lotus < Lupinus < Lolium. The lack of nodules suggested that no legume fixed atmospheric-N2.
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