Agriculture Reference
In-Depth Information
TABLE 6.3
Structure of tuber yield in various varieties depending on mineral nutrition, years
2012-2013
Yield structure
Marketabil-
ity
(%)
Starch con-
tent
(%)
Nitrates con-
tent
(mg%)
Experiment variants
Yield
(t/ha)
Volzhanin
Control
10.2
78
13.5
23
N
32
P
32
K
32
13.6
81
13.8
56
N
48
P
48
K
48
15.9
86
14.1
68
N
64
P
64
K
64
19.9
90
13.6
129
НСР
05
1.08
Udacha
Control
12.5
82
14.6
45
N
32
P
32
K
32
16.5
85
16.4
65
N
48
P
48
K
48
20.1
88
16.9
77
N
64
P
64
K
64
25.6
92
15.2
128
НСР
05
1.72
Bars
Control
12.6
83
15.9
26
N
32
P
32
K
32
16.8
86
17.8
46
N
48
P
48
K
48
20.9
89
18.5
66
N
64
P
64
K
64
25.8
93
16.6
126
НСР
05
1.73
Data of our researches revealed (Table 6.4) that the increase in productivity and
marketability, and also quality indicators (the content of starch, dry matters, and reduc-
ing sugars), during the increase in fertilizer dose occurred due to a certain increase in
level of mineral nutrition, and then started to decrease. The nitrates content of all the
varieties did not exceed the maximum permissible rates (250 mg of %/kg), but it is
possible to note that with the rise in the level of mineral nutrition this sign increased.
At dose N
64
P
64
K
64
, the content of nitrates for varieties Volzhanin, Udacha, and Bars
were 129, 128, and 126 mg of %/kg, respectively.
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