Abstract:
Fertilization of grape plantations represents one of the basic
technological steps, allowing for the long period of time of exploitation (30 –
40 years), intensive character of the used technologies and of highly
requirements of nutritive elements. With a view to satisfy the nourishment
demands of the grapevine, plant known as a big consumer of nutritive
element, (N 6-15kg/t grapes, P2O5 1-3,7 kg/t grapes, K2O 3,8-12 kg/t
grapes), busides the mineral fertilization, an important role owns the leaf
fertilization with positive implications over the grape production. In this
purpose by applying leaf fertilizers that towards the macroelements with
NPK base, they also contain microelements, it is favourised a quick
absorbtion of mineral elements that stimulates the growth and bear of the
grape vine with an impact over the production and avoiding the environment
poluation. On this scientifical work we watch over the efficiency of some leaf
fertilizers application on two different agrofonds: N0P0K0 and N50P25K90
(ecological doses), on main grape physiological parameters (offshoot’s
length, leaf area and fertility parameters). For this purpose we used seven
different leaf fertilizers, five chemical F221, Folvifer, Fertcomplex C,
Kristalon green, Poly-Feed, and two biological Maxiroot şi Biostar, used on
those two agrofonds, which had contribute to physiological parameters
growing and also to maintaining an unpolluted environment. From our
research it has establish the fact that the leaf and mineral fertilized variants
had obtained the highest results of absolute and relative fertility parameter
relatively to the leaf fertilized variants. Vine shoot length and leaf area were
influenced by the fertilization type also to leaf fertilized variants and to
combined fertilization, this one has registered superior values from
unfertilized variant.
