The results of studies on productivity of single-species crops of perennial grasses,
depending on the depth of the main soil tillage on the same sod-podzolic soils, as in
the previous experiment on the background introduction of N
90
Р
60
К
60
, given in table 5.
Table 5 Productivity of perennial grasses, t/ha
Grass species and
seeding rates, kg/ha
Fertilizers
Dry mass over the years of use
2011
2012
2013
average
Phleum pratense L., 14
20-22
5,75
5,75
5,66
5,72
16-18
5,70
5,68
5,60
5,66
8-10
5,60
5,63
5,53
5,59
Lolium perenne L., 26
20-22
6,90
7,30
6,31
6,84
16-18
6,85
7,25
6,20
6,77
8-10
6,80
7,12
6,15
6,69
Festuca orientalis, 26
20-22
6,50
6,78
6,81
6,70
16-18
6,41
6,70
6,75
6,62
8-10
6,30
6,58
6,63
6,50
Bromus inermis, 26
20-22
6,08
6,63
6,79
6,50
16-18
6,00
6,55
6,70
6,42
8-10
5,90
6,43
6,67
6,33
Dactylis glomerata, 16
20-22
5,99
6,40
6,61
6,33
16-18
5,95
6,33
6,55
6,28
8-10
5,80
6,22
6,40
6,14
Festuca rubra L., 18
20-22
5,35
5,70
5,75
5,60
16-18
5,32
5,65
5,70
5,56
8-10
5,20
5,51
5,60
5,44
Phalaris arundinacea,
14
20-22
6,07
6,68
6,75
6,50
16-18
6,00
6,62
6,72
6,45
8-10
5,91
6,51
6,67
6,36
НІР
05
, t/ha by factors:
grass stand
0,38
0,35
0,32
0,35
depth of soil tillage
0,31
0,29
0,30
0,30
Share of factors, %:
grass stand
59
57
56
57
depth of soil tillage
41
43
44
43
On average, for the first three years of use, namely of 2011-2013, more powerful
output factor from 1 ha of dry mass was factor of grass stand with the share of 57%.
Meanwhile the share factor of the depth of soil tillage is 43%. Should note that in the
first year living of grass the share of influence factor of grass stand was the largest and
made up 59%. At the second and third years it decreased by 57 and 56% respectively.
Conversely, the influence of depth of soil tillage factor over the years slightly
decreased.
Analyzing the results of research it turned out that productivity of single-species
perennial cereal grasses at different depths of main tillage over the 2011-2013 have
fluctuated in average 5,59-6,84 t/ha of dry mass, 3.91-4.92 t/ha of fodder units, 0,82-
1,08 t/ha of crude protein and 45,3-56,8 kJ/ha of exchange energy.
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