02172naa a2200325 a 450000100080000000500110000800800410001910000200006024501010008026000090018150001490019052010850033965000200142465000200144465000200146465000110148465000160149565000160151165000300152765000320155765000190158965000220160865300190163065300200164965300280166970000210169770000190171870000170173777300920175420938272018-08-02       2006    bl uuuu     u00u1 u    #d1 aNUNES, J. C. S.  aPotato plant growth and macronutrient uptake as affected by soil tillage and irrigation systems.  c2006  aTítulo em portguês: Crescimento da batateira e absorção de macronutrientes influenciados pelos sistemas de preparo de solo e de irrigação.  aThe objective of this study was to evaluate potato plant growth and macronutrient uptake, as affected by soil tillage methods, in sprinkle and drip irrigated experiments. Eight treatments were set: T1, no tillage, except for furrowing before planting; T2, one subsoiling (SS); T3, twice rotary hoeing (RH); T4, one disc plowing (DP) + twice disc harrow leveling (DL); T5, 1DP + 2DL + 1RH; T6, 1DP + 2DL + 2RH; T7, 1SS + T6; T8, one moldboard plowing (MP) + 2DL. Treatments were arranged in a randomized block design with four replications. In both irrigation systems, plants presented higher emergence velocity index (EVI), when the soil was not tillaged, and the EVI was inversely related to the maximum tuber dry mass production. In both experiments, a functional direct relationship was found between the leaf area index and maximum tuber dry mass yield. The growth of plant organs (tuber, leaf, stem and root) and the macronutrient (N, P, K, Ca and Mg) contents in potato plant responded positively to a deeper soil revolving caused by plowing, especially with moldboard plow.  aMinimum tillage  aMoldboard plows  aArado de Aiveca  aBatata  aCrescimento  aIrrigação  aIrrigação por Aspersão  aIrrigação por Gotejamento  aManejo do Solo  aSolanum Tuberosum  aMacronutriente  aPreparo do solo  aPreparo mínimo de solo1 aFONTES, P. C. R.1 aARAÚJO, E. F.1 aSEDIYAMA, C.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 41, n. 12, p. 1787-1792, dez. 2006