| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 41.5 KB | Adobe PDF | |||
| 799.43 KB | Adobe PDF |
Advisor(s)
Abstract(s)
The quantification and the time-course of organic nitrogen release from slurry applied at
sowing of maize grown for silage is of major importance to increase the efficient use of
slurry-N and to reduce environmental impacts. The objective of this work was to quantify the
net N mineralization measured in the 0-30 cm soil layer during the forage maize growth
period, when cattle slurry was applied at sowing to supply 340 (T1), 190 (T2) and 0 (T3) kg
total N ha
-1
. The experiment was carried out during 1999 in the NW region of Portugal. Net
mineralization rates were significantly different and reached high values, being a relevant
source of N for the plants. During the forage maize crop net mineralization represented 401,
281 and 174 Kg N ha
-1
respectively on treatments T1, T2 and T3, values that correspond to
average net N mineralization rates of 1.3, 0.9 and 0.6 mg N kg
-1
soil day
-1
. The forage maize
dry matter yields on these treatments reached 22, 19 and 13 t ha
-1
, respectively for T1, T2 and
T3.
Description
Keywords
Cattle-slurry maize forage N mineralization
Citation
Pereira J., Trindade H., Coutinho J., Moreira N., 2006. Nitrogen mineralization in soils receiving different rates of cattle-slurry and cropped with forage maize. Grassland Science in Europe 11, 724-726.