The Research Of Calcium, Magnesium, Boron, Iron Absorption Rules Of Vitis Davidii Fo(e|")x

Vitis davidii Foex, as one with featured germplasm, has the following characteristics: strong flower bud differentiation ability, strong resistance, high and stable production. Vitis davidii Foex was soilless cultivatied to study the absorb and accumulate discipline of calcium, magnesium, boron and iron.(1) Vitis davidii Foex need calcium to 66.50 g/strains annual. Before grape flowering need calcium to 21.78 g/strains, flowering to fruit enlargement period with 13.04 g/strains, fruit enlargement to coloration period with 6.00 g/strains, coloration to maturity period with 17.15 g/strains, maturity to defoliation period with 8.53 g/strains.Vitis davidii Foex absorption and accumulation of calcium mainly occured at the fruit enlargement period. Throughout the growing season leaves increased the amount of calcium, calcium decreased in stems, fruit appeared a single peak in expansion period. The amount of calcium descending order were:leaves, stems and fruit.(2) Vitis davidii Foex need magnesium to 43.84 g/strains annual. Before grape flowering need magnesium to 19.09 g/strains, flowering to fruit enlargement period with 9.59 g/strains, fruit enlargement to coloration period with 7.13 g/strains, coloration to maturity period with 3.51 g/strains, maturity to defoliation period with 4.52 g/strains.Vitis davidii Foex absorption and accumulation of magnesium mainly occured at the fruit enlargement period. Throughout the growing season leaves appeared a valley at the coloration period with amount of magnesium, magnesium stable in stems, fruit appeared a single peak in expansion period. The amount of magnesium descending order were:leaves, stems and fruit.(3) Vitis davidii Foex need boron to 0.30 g/strains annual. Before grape flowering need boron to 0.20 g/strains, flowering to fruit enlargement period with 0.02 g/strains, fruit enlargement to coloration period with 0.04 g/strains, coloration to maturity period with 0.02 g/strains, maturity to defoliation period with 0.02 g/strains.Vitis davidii Foex absorption and accumulation of calcium mainly occured at the flowering period. Throughout the growing season fruit slowly declined the amount of boron, boron in the leaves rised tortuous, boron in stems tortuous declined. The amount of boron in descending order were:fruits, leaves, stems.(4) Vitis davidii Foex need iron to 0.95 g/strains annual. Before grape flowering need iron to 0.41 g/strains, flowering to fruit enlargement period with 0.20 g/strains, fruit enlargement to coloration period with 0.07 g/strains, coloration to maturity period with 0.07 g/strains, maturity to defoliation period with 0.19 g/strains.Vitis davidii Foex absorption and accumulation of iron mainly occured in the fruit at previous period while occured in leaves at late period. Throughout the growing season leaves appeared a valley at the coloration period with amount of iron, iron slowly decreased in stems, fruit appeared a single peak in expansion period. The amount of iron descending order were:leaves, stems and fruit.