Revista Brasileira de Engenharia Agrícola e Ambiental
versión On-line ISSN 1807-1929
SANTOS, Valdevan R. dos et al. Growth and yield of sugarcane under different phosphorus sources. Rev. bras. eng. agríc. ambient. [online]. 2009, vol.13, n.4, pp. 389-396. ISSN 1807-1929. http://dx.doi.org/10.1590/S1415-43662009000400004.
This work had as its objective in the evaluation of the growth and production of the sugarcare plant under different phosphorus sources. The experiment was carried out in Coruripe, AL, Brazil with 10 fertilizer treatments: 1) Control; 2) NK + micronutrient; 3) Super Phosphate Simple; 4) Triple Super Phosphate; 5) Fosmag; 6) Gafsa; 7) MAP; 8) NPK 06-26-24 (460 kg ha-1); 9) Compost and 10) Simple Super Phosphate - splitdose. The experiment was in random blocks, with four replicates. Parameters evaluated were: number of tillers, height of plants, IAF, rate of stalk growth, rate of biomass production of the stalk, relative growth rate, production and P in leaf and available in soil. P sources did not show any significant influence upon the growth of cane-plant due to the residual effect of previous manuring, with average yield of 80 t ha-1. The triple super phosphate produced the best production in the cane-plant, which presented three growth phases: 1st phase: intense tillering until 120 days after planting (DAP); 2nd phase:intense growth between 120 and 240 DAP; and 3rd phase: maturation, between 240 and 360 DAP. The major growth rate and fresh matter stalk production occurred after intense tillering phase between 120 and 240 DAP.
Palabras llave : biometric indexes; plant-cane; phosphate fertilization.