was on the variant with the Dactylis glomerata, which was 79.1 mg/kg. The lowest
content of nitrogen observed during the cultivation of Lolium perenne L. - 75.8-77.8
mg/kg respectively.
Table 6 Changing of physico-chemical rates of sod-podzolic soils during the
cultivation of cereal grasses
№
Variant
Plowing, cm
On average during the years of growing
alkaline
hydrolyzed
nitrogen
mobile
phosphorus
exchangeable
potassium
1
Phleum pratense L.
20-22
76,5
81,5
108,6
16-18
78,1
81,9
100,4
8-10
77,2
80,8
101,4
2
Lolium perenne L.
20-22
75,8
81,4
106,7
16-18
77,8
82,2
103,7
8-10
77,1
81,4
103,2
3
Festuca orientalis
20-22
77,8
106,5
114,5
16-18
78,4
108,2
116,5
8-10
78,1
104,5
112,2
4
Bromus inermis
20-22
77,4
81,6
106,4
16-18
79,0
82,1
103,7
8-10
77,9
81,2
103,0
5
Dactylis glomerata
20-22
77,9
106,9
110,1
16-18
79,1
108,4
110,3
8-10
77,8
108,0
116,8
6
Festuca rubra L.
20-22
77,1
106,3
110,3
16-18
77,7
106,8
111,3
8-10
76,6
106,3
112,2
7
Phalaris arundinacea
20-22
76,2
107,3
115,2
16-18
77,6
108,0
120,3
8-10
76,9
107,2
128,1
Analysis of experiment results showed that during the growth of all investigated
cereal grasses, content of alkaline hydrolyzed nitrogen in the soil increased,
irrespective from the variant of soil tillage.
The content of phosphorus in plants is much less than nitrogen. However, the
availability of phosphorus for plants requires no less care than nitrogen supply. Unlike
nitrogen, naturally phosphorus rich soils practically do not exist.
The availability of phosphates in the soil for plants depends, firstly on optimizing
of the conditions for microbiological activity of the soil that is from the creation of
appropriate aeration and increase of moisture content through the structure formation,
tilling of the soil and organic fertilizers use.
The accumulation of mobile phosphorus in the 0-10 cm layer of soil is due to
localization of fertilizers in it, also because phosphates are in contact with smaller
volume of soil and, therefore, less fixed by the absorptive complex [7, 312].
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