B. J. Rogan
For the successful implementation of the plan Bookmarks vineyards in the Moldavian SSR is necessary to identify and use all available reserves of production of seedlings.
Average yield seedlings in the Republic for a number of years is 25 to 30% of the planted in shkolku graft cuttings. Increasing the output of the first varieties grafted seedlings is now acquiring particular importance.
Increase the yield of planting material may be due to the expansion of the areas under shkolku and by increasing the output of seedlings per unit area.
Experience advanced pitomnikovodcheskih farms and the results of our studies show that this can be achieved with good quality grafted cuttings and optimal growth conditions in their shkolke.
Rootstock varieties of grapes, such as Ripariagluar and Riparia X Rupestri 101-14 better take root and grow in wet soil, light, highly productive with a small amount of lime; Berlandieri X Riparia Kober 5BB and Chasselas X Berlandieri 41-B drought-resistant, not demanding to the lime content and grow well in poor soils.
Site selection under shkolku all agricultural practices at planting grafted cuttings should be carried out taking into account the requirements of the stock to the growing conditions (depth of planting, watering and soil compaction in the series, types and standards of fertilizers).
The farm «Pauleshty» călăraşi district (1958 and 1959)., Aligote cuttings, grafted on Riparia X Rupestris 3309, planted on calcareous loamy black soil. In an embodiment of planting with irrigation at the rate of two buckets of water per 1 running. m shkolki and subsequent sealing of the soil in the row yield seedlings of first grade was 15.3%, and without irrigation and soil compaction — 41.8% of the planted in shkolku graft cuttings. Output grew seedlings when the first watering is carried out about two weeks after planting and the soil in the row is not very compacted.
In an embodiment where the rootstock was Riparia Gloire (grafted cuttings planted on loamy leached chernozem), the yield was respectively 67.1 and 34.2%.
For the successful cultivation of seedlings is not less important is the depth of planting grafted cuttings. The results of experiments carried out by us at the farm Frunze district of Tiraspol (1957- 1959 biennium.) Show that with decreasing planting depth from 35 to 15 cm on calcareous loamy black soil yield seedlings increased from 30 to 58%. On a lighter-textured leached chernozem of the farm «Pauleshty» best planting depth of 25 cm.
Adding fertilizer to the ranks determined by the characteristics of the stock and soil conditions in shkolke. So, on calcareous loamy black soil best results are obtained when making P2O5 — 20 kg per 1 hectare, especially under the grafted cuttings, where rootstocks are trudnoukorenyayuschiesya varieties such as Berlandieri X Riparia Kober 5BB or Chasselas X Berlandieri 41-B.
If the soil lighter in texture and rootstocks legkoukorenyayuschiesya (Riparia Riparia Gloire or X Rupestris 3309), the ranks of the landing made by nitrogen, phosphorus and potash at the rate of 15 kg of active ingredient per 1 hectare.