| Journal: | Acta scientiarum. Agronomy |
| Database: | PERIÓDICA |
| System number: | 000323900 |
| ISSN: | 1679-9275 |
| Authors: | Santos, Henrique Pereira dos1 Fontaneli, Renato Serena1 Spera, Silvio Tulio1 Tomm, Gilberto Omar1 |
| Institutions: | 1Empresa Brasileira de Pesquisa Agropecuaria, Centro Nacional de Pesquisa de Trigo, Passo Fundo, Rio Grande do Sul. Brasil |
| Year: | 2009 |
| Season: | Oct-Dic |
| Volumen: | 31 |
| Number: | 4 |
| Pages: | 719-727 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | The objective of this study, which employed a randomized complete block design, with four replicates, was to evaluate, after eight years (1995 to 2003), the soil fertility of a typical dystrophic red latosol (typic hapludox) located in Coxilha, Rio Grande do Sul State, Brazil, in six crop-livestock production systems (ILP): I) wheat/soybean, black oats + common vetch pasture/corn; II) wheat/soybean, black oat + common vetch + ryegrass pasture/corn; III) wheat/soybean, black oat + common vetch pasture/pearl millet pasture; IV) wheat/soybean, black oat + common vetch + ryegrass pasture/pearl millet pasture; V) wheat/soybean, oats/soybean, and black oat + common vetch pasture/pearl millet pasture; and VI) wheat/soybean, oats/soybean, and black oat + common vetch + ryegrass pasture/pearl millet pasture). Soil core samples were also collected in a fragment of subtropical forest adjacent to the experiment. After eight years, acidification in the top soil layer was observed. The exchangeable Mg and K and extractable P were affected by mixed-crop production models. The soil layers of 0-5 and 5-10 cm presented higher values of soil organic matter, P, and K. The reverse occurred with values of pH and exchangeable Al. The levels of soil organic matter, P, K and Ca + Mg decreased with soil depth. The crop systems studied presented higher values of C in the soil than the subtropical forest |
| Portuguese abstract | O objetivo deste estudo foi avaliar a fertilidade do solo no período de oito anos (1995 a 2003), num Latossolo Vermelho distrófico típico, em Coxilha, Estado do Rio Grande do Sul. Empregou-se o delineamento de blocos casualizados com sete tratamentos e quatro repetições, sendo seis sistemas de produção integração lavoura-pecuária (ILP): I) trigo/soja e pastagem de aveia preta + ervilhaca/milho; II) trigo/soja e pastagem de aveia preta + ervilhaca + azevém/milho; III) trigo/soja e pastagem de aveia preta + ervilhaca/pastagem de milheto; IV) trigo/soja e pastagem de aveia preta + ervilhaca + azevém/pastagem de milheto; V) trigo/soja, aveia branca/soja e pastagem de aveia preta + ervilhaca/pastagem de milheto; e VI) trigo/soja, aveia branca/soja e pastagem de aveia preta + ervilhaca + azevém/pastagem de milheto, e um fragmento de floresta subtropical próximo ao experimento. Após oito anos, verificou-se acidificação da camada 0-5 cm. Nas camadas do solo de 0-5 e de 5-10 cm, aumentaram os teores de matéria orgânica, P e K, enquanto os valores de Al e de pH diminuíram. Os teores de matéria orgânica, P, K e Ca + Mg decresceram em profundidade do solo. Os sistemas de manejo estudados proporcionaram maior quantidade de C acumulado no solo do que a floresta subtropical |
| Disciplines: | Agrociencias |
| Keyword: | Fitotecnia, Suelos, Labranza, Fertilidad del suelo, Materia orgánica, Nutrientes minerales |
| Keyword: | Agricultural sciences, Crop husbandry, Soils, Tillage, Soil fertility, Organic matter, Mineral nutrients |
| Full text: | Texto completo (Ver HTML) |
