studia universitatis babeÅ-bolyai biologia 2
studia universitatis babeÅ-bolyai biologia 2
studia universitatis babeÅ-bolyai biologia 2
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PHOSPHATASE ACTIVITIES IN A BROWN LUVIC SOIL<br />
Table 3<br />
Significance of the differences between phosphatase activities in a brown luvic<br />
soil submitted to different management practices<br />
Management practices Soil phosphatase<br />
activity*<br />
Significance of<br />
the differences<br />
Soil<br />
depth<br />
Mean activity values<br />
in management practices<br />
(cm) a b (a-b)<br />
1 2 3 4 5 6 7<br />
UPA 0-20 0.4197 0.3712 0.0485<br />
20-40 0.2854 0.3045 -0.0191<br />
40-60 0.1556 0.1865 -0.0309 0.0001>p<br />
No-till (a) versus<br />
conventional tillage (b)<br />
The same crop in the two rotations<br />
Maize in 2-crop UPA<br />
rotation (a) versus AcPA<br />
maize (plot 1) in 6-crop AlkPA<br />
rotation (b)<br />
Maize in 2-crop<br />
rotation (a) versus<br />
maize (plot 4) in 6-crop<br />
rotation (b)<br />
Wheat in 2-crop<br />
rotation (a) versus<br />
wheat in 6-crop<br />
rotation (b)<br />
AcPA 0-20<br />
20-40<br />
40-60<br />
AlkPA 0-20<br />
20-40<br />
40-60<br />
UPA<br />
AcPA<br />
AlkPA<br />
UPA<br />
AcPA<br />
AlkPA<br />
Different crops in the same rotation<br />
2-crop rotation<br />
Maize (a) versus<br />
wheat (b)<br />
6-crop rotation<br />
Maize (plot 1) (a)<br />
versus maize<br />
(FYM)** (b)<br />
Maize (plot 1) (a)<br />
versus clover (b)<br />
Maize (plot 1) (a)<br />
versus maize<br />
(plot 4) (b)<br />
Maize (plot 1) (a)<br />
versus soybean (b)<br />
UPA<br />
AcPA<br />
AlkPA<br />
UPA<br />
AcPA<br />
AlkPA<br />
UPA<br />
AcPA<br />
AlkPA<br />
UPA<br />
AcPA<br />
AlkPA<br />
UPA<br />
AcPA<br />
AlkPA<br />
0.3421<br />
0.1440<br />
0.1027<br />
0.1092<br />
0.0477<br />
0.0307<br />
0-60 0.2487<br />
0.1687<br />
0.0537<br />
0-60 0.2487<br />
0.1687<br />
0.0537<br />
0-60 0.2522<br />
0.1803<br />
0.0570<br />
0-60 0.2487<br />
0.1687<br />
0.0537<br />
0-60 0.2625<br />
0.1920<br />
0.0627<br />
0-60 0.2625<br />
0.1920<br />
0.0627<br />
0-60 0.2625<br />
0.1920<br />
0.0627<br />
0-60 0.2625<br />
0.1920<br />
0.0627<br />
0.2705<br />
0.1791<br />
0.1282<br />
0.0880<br />
0.0545<br />
0.0407<br />
0.2625<br />
0.1920<br />
0.0627<br />
0.2505<br />
0.2102<br />
0.0670<br />
0.2792<br />
0.2090<br />
0.0593<br />
0.2522<br />
0.1803<br />
0.0570<br />
0.3318<br />
0.2370<br />
0.0733<br />
0.3322<br />
0.1792<br />
0.0613<br />
0.2505<br />
0.2102<br />
0.0670<br />
0.3400<br />
0.1788<br />
0.0603<br />
0.0716<br />
-0.0351<br />
-0.0255<br />
0.0212<br />
-0.0068<br />
-0.0100<br />
-0.0138<br />
-0.0233<br />
-0.0090<br />
-0.0018<br />
-0.0415<br />
-0.0133<br />
-0.0270<br />
-0.0287<br />
-0.0023<br />
-0.0035<br />
-0.0116<br />
-0.0033<br />
-0.0693<br />
-0.0450<br />
-0.0106<br />
-0.0697<br />
0.0128<br />
0.0014<br />
0.0120<br />
-0.0182<br />
-0.0043<br />
-0.0775<br />
0.0132<br />
0.0024<br />
0.001>p>0.0001<br />
0.002>p>0.001<br />
0.0001>p<br />
0.001>p>0.0001<br />
0.02>p>0.01<br />
0.001>p>0.0001<br />
0.001>p>0.0001<br />
0.0001>p<br />
0.02>p>0.01<br />
0.05>p>0.02<br />
0.05>p>0.02<br />
0.02>p>0.01<br />
0.10>p>0.05<br />
0.01>p>0.002<br />
0.01>p>0.002<br />
0.01>p>0.002<br />
0.02>p>0.01<br />
0.02>p>0.001<br />
0.02>p>0.01<br />
0.02>p>0.01<br />
0.01>p>0.002<br />
0.10>p>0.05<br />
0.02>p>0.01<br />
0.02>p>0.01<br />
0.05>p>0.02<br />
p>0.10<br />
0.02>p>0.01<br />
0.05>p>0.02<br />
0.02>p>0.01<br />
0.02>p>0.01<br />
p>0.10<br />
0.05>p>0.02<br />
95
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