Izvorni znanstveni članak
https://doi.org/10.5513/JCEA01/23.2.3439
Decomposition and nitrogen mineralisation of two wild lupins (Leguminosae) species with potential as green manures
Juan F. ZAMORA NATERA
; Department of Botany and Zoology, University of Guadalajara, 45100, Nextipac, Zapopan, Jalisco, Mexico
Pedro M. GARCÍA LÓPEZ
; Department of Botany and Zoology, University of Guadalajara, 45100, Nextipac, Zapopan, Jalisco, Mexico
Carlos E. AGUILAR JIMENEZ
; Faculty of Agronomic Sciences C-V, Autonomous University of Chiapas, 30470, Villaflores, Chiapas, Mexico
Franklin B. MARTINEZ AGUILAR
; Faculty of Agronomic Sciences C-V, Autonomous University of Chiapas, 30470, Villaflores, Chiapas, Mexico
Héctor VÁZQUEZ SOLÍS
; Faculty of Agronomic Sciences C-V, Autonomous University of Chiapas, 30470, Villaflores, Chiapas, Mexico
Isidro ZAPATA HERNÁNDEZ
orcid.org/0000-0003-1732-7993
; Faculty of Agronomic Sciences C-V, Autonomous University of Chiapas, 30470, Villaflores, Chiapas, Mexico
Sažetak
The amount of biomass produced by various native species of genus Lupinus (L.) growing in Mexico ranges from 2.9- 8.2 Mg/ha of dry matter, which can add up to 200 kg/ha of N to soil as green manure. However, information is scarce on the decomposition and mineralisation this biomass in the soil. The above-ground decomposition and N mineralisation of Lupinus mexicanus Cerv. ex Lag. and Lupinus rotundiflorus M.E. Jones species from Mexico using fine-mesh litter bags was evaluated. Litter bags containing 5 g of above-ground air-dried biomass at the vegetative and flowering stages were buried at a depth of 20 cm. Were dug up every 3 weeks over the course of 4 months, dried and re-weighed to determine the lost mass and total N by the Kjeldahl method. The largest decrease in residue mass occurred during the first 3 weeks of incubation. However, the lost mass was higher in younger green manure (75 days old) than in older plants (85 days old) after 18 weeks of exposure in the field. It was found that 60-75% of the total N in the plant material was released in the first 6 weeks. In L. rotundiflorus green manure, it was found that 79.14% of the initial N in the vegetative stage and 77.6% of N in the flowering stage was released 18 weeks after litter bag installation, whereas L. mexicanus were 74.6% and 74.7%, respectively. It was found that both decomposition and N mineralisation occurred quickly in the green manures evaluated.
Ključne riječi
litter bags; legumes; biomass; soil; nutrient release
Hrčak ID:
279703
URI
Datum izdavanja:
27.6.2022.
Posjeta: 369 *