<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Rapp, M</style></author><author><style face="normal" font="default" size="100%">Derfoufi, F</style></author><author><style face="normal" font="default" size="100%">Blanchard, A</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Productivity and nutrient uptake in a holm oak (Quercus ilex L.) stand and during regeneration after clearcut</style></title><secondary-title><style face="normal" font="default" size="100%">Plant Ecology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">biomass</style></keyword><keyword><style  face="normal" font="default" size="100%">Clearcut</style></keyword><keyword><style  face="normal" font="default" size="100%">coppice</style></keyword><keyword><style  face="normal" font="default" size="100%">nutrient use</style></keyword><keyword><style  face="normal" font="default" size="100%">production</style></keyword><keyword><style  face="normal" font="default" size="100%">Quercus ilex L.</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1992</style></year></dates><volume><style face="normal" font="default" size="100%">99-100</style></volume><pages><style face="normal" font="default" size="100%">263-272</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The effect of clearcutting on biomass production and nutrient consumption was examined during the two years in a clearcut and a mature Quercus ilex L. coppice. The comparison was limited to the leaf com- partment and to the annual shoots, which were the only con]parable compartments in the two situations. At the same time, the dynamics of the nutrient pool (N, P, K, Ca, Mg), monthly uptake and recycling from the foliage, were studied. The second year after cutting, the leaf production was roughly the same at the two sites. However, the photosynthates appear to be used differently: in the young stand the perennial wood production was greater than in the mature stand, where the maintenance costs are higher. This is corroborated by the patterns of nutrient use.</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">LEONARDI, S</style></author><author><style face="normal" font="default" size="100%">Rapp, M</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">BIOMASS PRODUCTION AND NUTRIENT REQUIREMENT DURING RESTORATION OF A HOLM OAK COPPICE</style></title><secondary-title><style face="normal" font="default" size="100%">ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">biomass</style></keyword><keyword><style  face="normal" font="default" size="100%">coppice</style></keyword><keyword><style  face="normal" font="default" size="100%">NUTRIENT REQUIREMENT</style></keyword><keyword><style  face="normal" font="default" size="100%">STAND RESTORATION</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1990</style></year></dates><publisher><style face="normal" font="default" size="100%">GAUTHIER-VILLARS</style></publisher><pub-location><style face="normal" font="default" size="100%">S P E S-JOURNAL DEPT, 120 BD ST GERMAIN, F-75006 PARIS, FRANCE</style></pub-location><volume><style face="normal" font="default" size="100%">11</style></volume><pages><style face="normal" font="default" size="100%">819-834</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The restoration of a holm oak (Quercus ilex L.) coppice was studied during three years following a clear-cut. Leaf area rebuilding, above-ground biomass production and nutrient requirement are especially studied. The new produced above-ground biomass amounts respectively to 151, 913 and 2 161 g m-2, one, two and three years after clear-cut. Leaf area index, at the same ages, amounts respectively to 0,3-1,9 and 4,4 m2/m2. The last value is nearly the same as those of the 30 year old coppice stand (4,4 m2/m2). The biomass increment corresponds to a current yearly above-ground productivity of 165, 748 and 1 248 g m-2 of fresh material during these three years. The mean annual above-ground production, calculated over thirty years, only amounts to 800 g m-2. Concerning nutrients, it seems that the early years are characterized by a higher requirement of nitrogen, phosphorus and potassium in comparison to the mature stand. The needs for calcium start to be important only after the third year, with the reappearance of ``stems{''} and later trunks.</style></abstract></record></records></xml>