2. ENVIRONMENTAL ChEMISTRy & TEChNOLOGy 2.1. Lectures

Chem. Listy, 102, s265–s1311 (2008) Environmental Chemistry & Technology
Table VI
Impact of waste treatment on some composition features of green oat plants
Experimental alternative
Dry weight
mg piece
Dry matter Protein content
–1 % D.M. % P % %
C0 A1
R
R
Rn
162
159
248
100
98
153
44.8
48.1
41.9
10.08
5.42
12.56
100
53.8
124.6
A2
R
Rn
167
255
103
157
46.9
41.0
4.75
12.65
47.1
125.5
A3
R
Rn
161
255
99
157
47.9
39.2
5.01
13.68
49.7
135.7
A4
R
Rn
183
300
113
185
47.3
41.0
5.03
12.78
49.9
126.8
B1
R
Rn
155
233
96
144
51.3
43.0
5.41
12.31
53.6
122.1
B2
R
Rn
158
273
98
169
45.6
46.0
4.98
11.89
49.4
118.0
R 184 114 46.5 4.63 45.9
B3
B4
Rn 200 123 43.4 12.59 124.9
R 150 93 40.8 5.83 57.8
Rn 250 154 42.9 12.99 128.9
Because of their trace elements content, the soil treatment
with waste of type A and B generates in soil a different
trace element level in comparison to the control alternative,
presented in Table IV.
Analysing the iron content of the experimental alternatives,
it was established that unimportant increases of the iron
content took place once with the growth of both waste type
doses. The highest iron concentrations were found in alternative
A 4 and B 4 representing the highest waste doses and
having an increase of 12.7 % (A) and 8.1 % (B).
The manganese content in soil has lower values for all
the experimental alternatives than that of the control alternative.
An exception is represented by A 2 registering an increase
of 8.2 % and B 1 of 9.0 %, both with nitrogen contribution.
The zinc content in soil decreases once with the increase
of the waste dose. The highest value was registered for A 1
and the increase was of 190.4 %. By addition of waste B, the
zinc content in soil decreases having lower values than the
control alternative.
The copper content in soil remains almost constant after
waste addition. The highest increase was registered for A 4
representing 12.3 %. Treating soil with waste B, the highest
registered increase was 11.3 % for B 3 .
The effects of soil treatment with waste A and B show
an important influence on the development and nutrition of
green oat plants. The results are presented in Table V and
Table VI.
The enhance of the waste A amounts in soil treatment
had a beneficial effect on the grain germination praised by
a higher number of risen plants. Adding nitrogen to soil, the
number of risen plants remained low. The effects are similar
for soil treatment with waste B, except for B 1 and B 3 ,
where the nitrogen contribution increases the number of risen
s485
plants. The highest number of risen plants was established for
B 4 , 30 representing 100 % of the sown oat grains.
Green oat plants grew taller once with the increase of the
waste dose in both cases (waste A and waste B). Adding nitrogen,
an obvious increase of the plant size was established.
The tallest plants were find for alternatives A 4 (highest waste
A dose + nitrogen contribution), namely 77 cm and 78 cm for
B 2 (second waste B dose + nitrogen contribution).
At harvest time, green oat plants for all alternatives were
thinner, having a reduced fresh weight in comparison with the
control alternative for those without nitrogen contribution.
The nitrogen supplement makes the plants more vigorous
having a higher fresh weight and dry weight for all the experimental
alternatives. The fresh weight increase was more
evident for soil treatment with waste A; for the highest waste
dose (A 4 ), the increase was of 104 % in comparison with the
control alternative. Similar to the fresh weight increase, took
place the dry weight increase. The most evident results were
established for the alternatives treated with waste A. The
increase of the dry weight was the highest of 85 % for the
alternative A 4 .
The altering of dry matter was increasing for the alternatives
without nitrogen treatment and decreasing for those
with nitrogen treatment. The highest dry matter value was of
51.3 % for B 1 (lowest waste B dose) and the lowest value was
39.2 % for A 3 (waste A + nitrogen contribution).
The protein content of green oat plants shows, at harvest
time, two different aspects comparative with the control alternative.
For the alternatives in which no nitrogen was added,
the protein content represents half of the control alternative
content. Adding nitrogen, the protein content has increased
and became double given to the alternatives without nitrogen
contribution. The highest protein level was found for