<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>47</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Carmona, E.</style></author><author><style face="normal" font="default" size="100%">Ordovas, J.</style></author><author><style face="normal" font="default" size="100%">Ortega, M. C.</style></author><author><style face="normal" font="default" size="100%">Aguado, M. T.</style></author></authors><secondary-authors><author><style face="normal" font="default" size="100%">Roeber, R. U.</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default" size="100%">Nitrogen availability in composted cork</style></title><secondary-title><style face="normal" font="default" size="100%">INTERNATIONAL SYMPOSIUM ON GROWING MEDIA AND PLANT NUTRITION IN HORTICULTURE</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">bark; growing media; N immobilization</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1997</style></year><pub-dates><date><style  face="normal" font="default" size="100%">1997///</style></date></pub-dates></dates><publisher><style face="normal" font="default" size="100%">INTERNATIONAL SOCIETY HORTICULTURAL SCIENCE</style></publisher><pages><style face="normal" font="default" size="100%">349 - 352</style></pages><isbn><style face="normal" font="default" size="100%">90-6605-988-5</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Previous studies showed that plants grown in fresh cork (Quercus suberL. bark) had a reduced growth compared with peat and low rates of N. In
composted cork, however, plant growth was similar with those in peat,
but the N content of plants was still slightly lower.
The purpose of this study was to investigate N availability in fresh and
composted cork during 4, 5.5 and 7 months, using peat as control medium.
The substrates were also incubated at 25 degrees C during 60 days after
adding 0.25, 1.0, 1.75 or 3.0 g ammonium nitrate per 1 of substrate.
Samples were taken periodically to measure NO3-N, NH4-N and total N.
Also the Nitrogen Drawdown Index (NDI) for the addition of 75 mg.l(-1) N
and 150 mg.l(-1) N was measured after incubation at 25 degrees C.
N immobilization rates were well correlated to NDI. NH and soluble N
drawed down rapidly in cork substrates while total N stayed constant.
High rates of ammonium nitrate should be added to maintain a constant
level of available N to plants in cork.
</style></abstract><notes><style face="normal" font="default" size="100%">The following values have no corresponding Zotero field:&lt;br/&gt;periodical: INTERNATIONAL SYMPOSIUM ON GROWING MEDIA AND PLANT NUTRITION IN HORTICULTURE&lt;br/&gt;issue: 450&lt;br/&gt;pub-location: PO BOX 500, 3001 LEUVEN 1, BELGIUM</style></notes></record></records></xml>