Uptake of iron, according to the age, by sugarcane in soils of the state of São Paulo

Abstract

Three field trials were carried out to study the uptake of iron by stalks, leaves and "stalks + leaves" by sugarcane. The trials were carried out on the 3 great groups of soils, which were: Latossolic B "Terra Roxa" - LR, Ortho Dark Red Latossol - LE and Red Yellow Podzolic - Laras variation-PV1s, in the State of Sao Paulo. Variety under investigation was CB41-76. Harvests were made every two months, from the 4 th to the 16 th month for plant cane, and 4 th to 12 th month for ratoons. At each harvest and for each replicate, samples were drawn from a furrow 3 metres in length. The experimental design was a splite-plot, and each time of sampling constituted a su-plot. It was concluded that there is a soil influence on iron concentration (stalks, leaves and leaf +3) and on the iron uptake (stalks, leaves and "stalks + leaves") for plant cane and ratoons on, where the values of PVls soil were lower than LR and LE soils. The concentration of iron in the leaf +3 behave differently, according to the age.