Adubação orgânica e mineral sobre características produtivas do tomateiro, cultivar Santa Cruz em ambiente protegido.

Abstract

The tomato is quite demanding in a culture nutrients are readily available for absorption, necessitating the use of large amounts of fertilizer and lime in its production process. The research aimed to study the effect of organic and mineral fertilizer in a Red Yellow Podzolic with high acidity and low fertility levels on some growth characteristics of tomato cultivar Santa Cruz environmental conditions in screenhouse. The experiment was conducted in protected environment (green-house) of DSER / CCA / UFPB, in Areia - PB. We used a surface layer material of a Red Yellow Podzolic the city of Sand - PB, collected at a depth of 0-20 cm, with sandy clay loam texture, with high acidity, low fertility and presenting average organic matter content. The treatments were defined by six quantities of organic matter (manure) in the proportions percentage of the base volume (% organic matter soil +%): T1 - MO 0% and 100% soil, T2 - 20% MO and 80% soil, T3 - 40% and 60% soil OM, T4 - 60% and 40% soil MO; T5 - 80% and 20% MO and soil; T6 - 100% and 0% MO and soil treatment with mineral fertilizer , 80-180-80 kg / ha N-P2O5-K2O, experimental design used in a randomized block with seven treatments and three replications. We used a tomato crop (Lycopersicumesculentum Mill.) Variety Santa Cruz as test crop. We evaluated the results for plant height (AP), leaf area (AF), stem diameter (DC), dry matter (MSPA), water consumption by the plant (ETc). The results revealed a significant effect (p ≤ 0.01) of treatment on the results of the variables analyzed. The addition of organic manure in amounts equal to or greater than 40% contributed to the improved results in leaf area, dry matter production of shoots of tomato. The results of ETc fit significantly (p ≤ 0.01) and AP and DC significantly (p ≤ 0.05) to a linear function of the 2nd degree, while that for AF and the effect was linear MS depending on the levels of organic matter used. The addition of organic matter in proportions greater than or equal to 40% promoted better results for leaf area, dry matter and evapotranspiration.