Sunflower seeds grade Donskoy large-fruited
The grade is created by selection of plants from the difficult population received at repollination of grades and numbers of sunflower with a high weight of 1000 seeds.
Height of plants of a grade – 180–210 cm. The stalk is upright, not branching, roundish, without antotsianovy coloring. Leaves of an ovate-heart-shaped form, green without antotsian. The basket is round, slightly convex, with a diameter of 19-25 cm.
Semyanki armor-clad, dark, with a weak polosatost. The Luzzhistost of seeds of 25-32%, a maslichnost of 39-45%, weight is 1000 seeds of 130-160 g.
On length of the vegetative period the grade concerns to group of mid-season. The period from shoots to economic ripeness in the conditions of the Rostov region makes 104–111 days.
The grade is high-yielding. For years of competitive studying the harvest of seeds of this grade averaged 33,4 c/hectare.
The main distinctive feature of a grade is its high mass of 1000 seeds. On average for years of studying in a competitive sortoispytaniye weight is 1000 seeds
made 138,9 g. The high mass of 1000 seeds in combination with a large kernel causes steady demand for commodity seeds of this grade from the enterprises of a food and confectionery profile from the most different regions of Russia and the CIS countries.
Along with high efficiency of a plant of a new grade in weak degree are surprised zarazikhy, false mealy dew, are practically not surprised vertitsillezy, a podsolnechnikovy pyralid, are well adapted for kombaynovy cleaning.
On production crops optimum density of plants of this grade should not exceed 30–32 thousand plants on hectare to cleaning.
The regions recommended for cultivation - the Steppe, the Forest-steppe.