Chemical Attributes of Savanna Soil Fertility after Low Rates of Fertilizer Application and Initial Growth of Eucalyptus Sprout Strains.

Eucalyptus cultivation occupies large areas of the Brazilian territory, having increasingly relevant within the agriculture of the country this context, driving budding strains is an interesting and common technique used in eucalyptus plantations in Brazil. The objective of this research was to evaluate the effects of mineral fertilizer rates and the development of one or two sprout of eucalyptus (clone I- 144 (Eucalyptus grandis x Eucalyptus urophylla), second cycle, under the nutrient content in the soil layer 0 - 20 cm in savanna soil with low fertility. Experiment was conducted in Tr�s Lagoas, MS, Brazil (20� 45' South , 51� 40' West and 320 m) Experimental design was a randomized complete block design with 8 treatments and 5 replications in a factorial scheme 2 x 4: with one or two sprout of eucalyptus in the production cycle and four rates of mineral fertilizer (0, 50, 100 or 200% of the recommended amount (200 kg ha^-1 the formula 06-30-06 + 1% Ca + 3% S + 1% Mg + 1,5% Cu + 1% Zn) for planting seedlings) applied immediately after the definition of the sprout. Each plot consisted for 49 plants. Highest contents of P, K, Mg, B, Cu, Mn and Zn were obtained when opted for driving a sprout per plant, thus indicating greater nutritional requirement when conducting two buds per vine eucalyptus. The increasing rates of fertilizer increased the contents of P, S-SO₄ and Cu in soil, irrespective of the conduct of one or two sprout of eucalyptus. However, the contents of B, Mn and Zn increased only when it opted for conducting a sprout per eucalyptus plant.