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| GADELHA, J. C.; XAVIER, F. A. da S.; ESCOBAR, M. E. O.; GILKES, R. J.; OLIVEIRA, T. S. de. |
| Purpose: Determine the decomposition of compost under two levels of shading (total and none) and central pivot and sprinkler irrigation. Methods: Litter boxes were made with a 4mm mesh base, and PVC sides and filled with compost. Boxes were recovered after 0, 2, 4, 6, 8, 10 and 12 months. Amounts of remaining compost and nutrients were measured and decomposition rates and half-life values were calculated. Soil under the litter boxes was analyzed before and after removing boxes, for nutrient contents (N, P, K, Ca, and Mg) and organic carbon. Results: Compost was lost quickly over time. Losses were faster under central pivot than sprinkler irrigation. Total shade caused higher rates of decomposition than without shade. Half-life values varied from 0.12 to... |
| Tipo: Artigo de periódico |
Palavras-chave: Irrigação; Horticultura. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112448 |
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| SACRAMENTO, J. A. A. S. do; ARAÚJO, A. C. de M.; ESCOBAR, M. E. O.; XAVIER, F. A. da S.; CAVALCANTE, A. C. R.; OLIVEIRA, T. S. de. |
| Abstract: In the semiarid region of Brazil, inadequate management of cropping systems and low plant biomass production can contribute to reduce soil carbon (C) and nitrogen (N) stocks; therefore, management systems that preserve C and N must be adopted. This study aimed to evaluate the changes in soil C and N stocks that were promoted by agroforestry (agrosilvopastoral and silvopastoral) and traditional agricultural systems (slash-and-burn clearing and cultivation for two and three years) and to compare these systems with the natural Caatinga vegetation after 13 years of cultivation. The experiment was carried out on a typical Ortic Chromic Luvisol in the municipality of Sobral, Ceará, Brazil. Soil samples were collected (layers 0-6, 6-12, 12-20, 20-40 and... |
| Tipo: Artigo de periódico |
Palavras-chave: Agricultura itinerante; Sistemas agroflorestais; Sequestro de carbono; Manejo conservacionista; Sistema agrossilvipastoril; Agroecologia; Agrosilvopastoral systems.; Agroforestry systems; Manejo do solo; Caatinga; Recurso natural.; Silvopastoral systems; Carbon sequestration; Soil management.. |
| Ano: 2013 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/980525 |
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