características físicas do solo e produtividade da batata dependendo de sistemas de preparo do solo soil physical characteristics and potato yield as affected by soil tillage systems
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ID: 172034
2007
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Abstract
Foi avaliado o efeito de sistemas de preparo do solo sobre o diâmetro médio dos agregados (DMA), porcentagem de cobertura da superfície do solo (CSS), profundidade da camada arada (PCA) e produção de tubérculos de batata. Foram instalados dois experimentos em solo argiloso com os mesmos tratamentos, sendo um irrigado por gotejamento e outro por aspersão. Os tratamentos foram: T1 = apenas abertura do sulco de plantio, prática comum aos demais tratamentos; T2 = uma subsolagem (SS); T3 = duas passadas de enxada rotativa (ER); T4 = uma aração com disco (AD) + duas gradagens niveladoras (GN); T5 = 1AD + 2GN + 1ER; T6 = 1AD + 2GN + 2ER; T7 = 1SS + a sequencia de T6; T8 = uma aração com aiveca (AA) + 2GN. Os tratamentos foram distribuídos em blocos ao acaso com quatro repetições e o plantio foi manual. Os maiores valores de DMA e de CSS foram observados em T1 e T2 e o maior valor de PCA, 29,6 cm, foi observado em T8. Em ambos experimentos, a produção de tubérculos comerciais (PCT) foi maior em T8, menor em T1 e T2 e intermediária nos demais tratamentos. Na média dos experimentos, o aumento médio da PCT pela aração com aiveca (T8) foi 52% em relação ao disco (T4).
The effects of soil tillage systems were evaluated on soil aggregate mean diameter (DMA), soil surface cover (CSS), deep-ploughed soil layer (PCA) and potato tuber yield. Two experiments, one sprinkle-irrigated and the other drip-irrigated, were conducted in a clay soil with the same treatments. The treatments were: T1 = no tillage, except furrowing before planting, also performed in the other treatments; T2 = one sub soiling (SS); T3 = twice rotary hoeing (ER); T4 = one disc plowing (AD) + twice disc harrow leveling (GN); T5 = 1AD + 2GN + 1ER; T6 = 1AD + 2GN + 2ER; T7 = 1SS + T6 sequence; T8 = one moldboard plowing (AA) + 2GN. Treatments were arranged in a randomized block design with four replications. Planting was manually performed, in previously open furrows. The highest DMA and CSS values were obtained at T1 and T2 and the highest PCA value, 29.6 cm, was observed at T8. In both experiments, commercial tuber yield was the largest in T8, the smallest in T1 and T2, and intermediate in the remaining treatments. In both experiments, the commercial tuber yield increased 52% due to moldboard plow (T8) in comparison to disk plow (T4).
The effects of soil tillage systems were evaluated on soil aggregate mean diameter (DMA), soil surface cover (CSS), deep-ploughed soil layer (PCA) and potato tuber yield. Two experiments, one sprinkle-irrigated and the other drip-irrigated, were conducted in a clay soil with the same treatments. The treatments were: T1 = no tillage, except furrowing before planting, also performed in the other treatments; T2 = one sub soiling (SS); T3 = twice rotary hoeing (ER); T4 = one disc plowing (AD) + twice disc harrow leveling (GN); T5 = 1AD + 2GN + 1ER; T6 = 1AD + 2GN + 2ER; T7 = 1SS + T6 sequence; T8 = one moldboard plowing (AA) + 2GN. Treatments were arranged in a randomized block design with four replications. Planting was manually performed, in previously open furrows. The highest DMA and CSS values were obtained at T1 and T2 and the highest PCA value, 29.6 cm, was observed at T8. In both experiments, commercial tuber yield was the largest in T8, the smallest in T1 and T2, and intermediate in the remaining treatments. In both experiments, the commercial tuber yield increased 52% due to moldboard plow (T8) in comparison to disk plow (T4).
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fontes2007horticulturacaractersticas
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|---|---|
| Authors | ;Paulo Cezar Rezende Fontes;Julio Cezar Silveira Nunes;Haroldo Carlos Fernandes;Eduardo Fontes Araújo |
| Journal | research on biomedical engineering |
| Year | 2007 |
| DOI |
10.1590/S0102-05362007000300007
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| URL | |
| Keywords | Keywords not found |
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