Back to Search
Start Over
Nutrient availability and organic matter content as affected by cropping systems and soil management
- Source :
- Ciência Rural, Volume: 33, Issue: 3, Pages: 477-486, Published: JUN 2003, Ciência Rural v.33 n.3 2003, Ciência Rural, Universidade Federal de Santa Maria (UFSM), instacron:UFSM
- Publication Year :
- 2003
- Publisher :
- FapUNIFESP (SciELO), 2003.
-
Abstract
- Sistemas de cultivo e de manejo de solo podem alterar as propriedades químicas do solo. Após oito anos (1985 a 1993), a fertilidade do solo foi avaliada, num Latossolo Vermelho Distrófico típico, em Passo Fundo, RS, em quatro sistemas de manejo do solo: 1) semeadura direta (SD); 2) cultivo mínimo (CM); 3) preparo convencional do solo com arado e grade de discos (PCD); e 4) preparo convencional do solo com arado de aivecas e grade de discos (PCA), e em três sistemas de cultivo: sistema I (trigo/soja), sistema II (trigo/soja e ervilhaca/milho) e sistema III (trigo/soja, ervilhaca/milho e aveia branca/soja). O delineamento experimental foi em blocos completos ao acaso, com parcelas subdivididas, e três repetições. A parcela principal (4 x 90m) foi constituída pelos sistemas de manejo do solo e a subparcelas (4 x 10m), pelos sistemas de cultivo. Os valores de pH, Al, Ca + Mg trocáveis, matéria orgânica (MO), P extraível e K disponível diferiram entre os sistemas de manejo e de cultivo do solo. Os teores de MO, P e K, na camada 0-5cm, foram mais elevados nos sistemas conservacionistas (CM e SD) em relação àqueles observados nos preparos convencionais do solo (PCD e PCA). Os valores de MO, P e K foram mais elevados na camada 0-5 cm, quando comparada com a observada de 15 a 20cm de profundidade, em todos os sistemas de manejo e cultivo do solo. Cropping systems and soil managment can change soil chemical properties. Soil fertility characteriscs were assessed after eight years (1985 to 1993) on a typical dystrophic red latosol located in Passo Fundo, State of Rio Grande do Sul, Brazil. Four soil management systems - 1) no-tillage, 2) minimum tillage, 3) conventional tillage using a disk plow plus disk harrow, and 4) conventional tillage using a moldboard plow plus disk harrow - and three cropping systems [I (wheat/soybean), II (wheat/soybean and common vetch/corn), and III (wheat/soybean, common vetch/corn and white oat/soybean)] were evaluated. A randomized complete block design, with split-plots and three replicates, was used. The main field plots (4 x 90m) were formed by soil management systems, while the subplots (4 x 10m) consisted of crop systems. The pH and concentration of exchangeable Al, exchangeable Ca + Mg, soil organic matter, extractable P, and exchangeable K were affected by soil management and cropping systems. Higher contents of soil organic matter, extractable P, and exchangeable K were observed in the 0-5cm layer for the conservation tillage systems (minimum tillage and no-tillage), as compared to the conventional tillage systems (disk plow and moldboard plow). The values of soil organic matter, P, and K were higher in the 0-5 cm layer, when compared to the ones observed in the 15-20cm layer, in all soil management and cropping systems.
- Subjects :
- fertilidade do solo
cultivo mínimo
Conventional tillage
General Veterinary
soil fertility
Soil organic matter
conventional tillage
Latosol
semeadura direta
rotação de culturas
Soil management
Tillage
Minimum tillage
Harrow
crop rotation
preparo convencional de solo
Agronomy
minimum tillage
no-tillage system
Animal Science and Zoology
Soil fertility
Agronomy and Crop Science
Mathematics
Subjects
Details
- ISSN :
- 01038478
- Volume :
- 33
- Database :
- OpenAIRE
- Journal :
- Ciência Rural
- Accession number :
- edsair.doi.dedup.....1147021f493aa4077cf40a22ea4c34ef
- Full Text :
- https://doi.org/10.1590/s0103-84782003000300013