Nutrient uptake, canopy volume and yield of Nagpur mandarin as affected by different rootstocks

Influence of various rootstock genotypes of rough lemon, Rangpur lime, Cleopatra mandarin, sour orange and Trifoliate orange on leaf nutrient composition of three-year-old Nagpur mandarin grown on black soil was studied. Almost all the nutrients except Mn have shown significant difference in their concentration in the Nagpur mandarin scion due to rootstock influence. Rough lemon (Tirupati) rootstock recorded highest uptake of P, Cu and Fe with highest canopy volume and intermediate fruit yield. Similarly, Rangpur lime (Gonnicoppal) recorded highest uptake of N and K with highest fruit yield and higher plant vigour. Cleopatra mandarin (Morrocco) recorded the highest uptake of Mg, Mn and Zn with lower canopy volume and fruit yield. The nutrient uptake pattern of N, K and Cu showed strong positive correlation with canopy volume as well as fruit yield of the plant. While, Mn uptake showed negative significant correlation with fruit yield.