EFFECTS OF PHOSPHORUS AND INOCULATION OF VAM FUNGUS, ON NUTRITION OF 2 CITRUS ROOTSTOCKS

This study was carried out to evaluate the effects of phosphorus and i noculation with the VAM fungus, Glomus clarum, on nutrition of orange rootstocks, planted in plastic containers until the grafting period. A factorial design (4 x 2 x 2) with four phosphorus doses (O, 320, 640 and 1280 g of P2O5/m(3)), two orange rootstocks [Rangpur lime (Citrus limonia L. Osbeck) and Cleopatra mandarin (Citrus reshni Hort. ex Tan. )] with and without inoculation of Glomus clarum was used. Increased d osages of phosphate resulted in higher amounts of P and Ca, lower amou nts of Cu and Zn, higher amounts of B in dry matter of Rangpur lime an d lower amounts of B in dry matter of Cleopatra mandarin. The inoculat ion of VAM decreased the amounts of K in dry matter in both plants. Ra ngpur lime when inoculated had lower amounts of S. Cleopatra mandarins when inoculated had higher amounts of S. The amounts of micronutrient s in dry matter wasn't influenced by the inoculation.