MINERAL NUTRITION AND POTATOES EFFICIENCY IN CONDITIONS OF RNO–ALANIA - Ecological Consequences of Increasing Crop Productivity - page 51

Considering data of our researches, we can note that the variety Bars had the maxi-
mum plant height, the variety Udacha conceded to it but not much, but the variety
Volzhanin had the minimum height (Table 6.1). Bars had maximum signs according to
the top mass and leaf area.
Thus, with increase in the dose of mineral nutrition, plant height, top mass, and
area of assimilatory surface also increased. According to Table 6.2, the increase in the
dose of fertilizers has no essential impact on stalk quantity. Therefore, we can note that
this sign (quantity of stalks per a bush) belongs to varietal features.

TABLE 6.2 Influence of mineral nutrition on formation of potato top mass during flowering
phase: years 2012-2013

Structure of top mass

Variant

Plant height
(cm)

Stalk quantity
(per bush)

Top mass
(g/bush)

Leaf area
(m 2 /bush)

Volzhanin

Control 42 3.2 274 1.8

N 32 P 32 K 32 47 3.2 296 2.0

N 48 P 48 K 48 51 3.0 320 2.4

N 64 P 64 K 64 55 3.4 352 2.3

Udacha

Control 46 4.1 310 2.0

N 32 P 32 K 32 56 4.0 420 2.3

N 48 P 48 K 48 58 3.9 436 2.3

N 64 P 64 K 64 65 4.2 512 2.5

Bars

Control 48 4.2 320 2.1

N 32 P 32 K 32 60 4.1 412 2.5

N 48 P 48 K 48 65 3.9 486 2.4

N 64 P 64 K 64 69 3.7 524 2.8

In the variety Volzhanin, on the variant, with the application of N 64 P 64 K 64 , plant
height increased by 13 cm in relation to control, the top mass—78 g/bush, the leaf
area—0.5 2 m/bush. In the varieties Udacha and Bars, on the same variant, the increase
of 19 cm, 202 g/bush, 0.5 2 m/bush, 21 cm, 204 g/bush, and 0.7 2 m/a bush was noted.
With increasing doses rose all indicators structure of aboveground mass of potato
plants of all studied sorts (Table 6.3).