Abstract:
Citrus rootstocks have
prime effects on the size of tree and fruit,
quality of fruit and micorhyza
dependence, which make difference in
their leaf mineral elements concentration
in leaf of grafted cultivars on them. A pot
factorial experiment with two factors
including rootstocks (sour orange,
Citrange, Rough Lemon, Citrumelo and
Yozo) and grafted cultivars (Thomson
Navel, Sanguine, Unshiu Tangerine) was
carried out in farm conditions with three
replications. The studied traits were
concentrations of elements in leaves
including nitrogen, phosphorus, potassium,
sulfur, magnesium, iron, manganese, zinc
and copper. The result of analysis of
variance revealed significant mean
squares of variety, rootstock and their
interaction effects for the elements in
leaves. Citrumelo rootstock had mainly
effect on nutritional elements in leaves.
Unshiu mandarin with Citrumelo
rootstock had the most amount of nitrogen
and sanguine variety with Citrange
rootstock made the highest concentration
of phosphorus and potassium in leaves of
the grafted cultivar. Significant positive
correlation of K with Fe and Zn indicating
that all rootstocks with high mean value
of K in leaf of grafted cultivar will have
high amount of Fe and Zn. Significant
positive correlation also detected between
N and P of leaf of grafted cultivars in
combination with different rootstocks;
therefore, most of combinations with high
mean value of N had also high mean
value of P. Unshiu Tangerine had high
variation for P, but Thomson Novel had
lowest variation for this mineral element.
Due to Significant positive correlation of
S with Mg and Mn, most of rootstocks
with high amount of S in leaf of grafted
cultivar had high mean values of Mg and
Mn in their leaf of grafted cultivars.
