Báo cáo lâm nghiệp: "Afforestation/reforestation of New Zealand marginal pasture lands by indigenous shrublands: the potential for Kyoto forest sinks" ppt

... of succession in NZ shrublands have Figure 1. Potential area for afforestation/reforestation of marginal pasture lands by indigenous shrublands and forests. Study site loca- tions are also indicated. ... shrubland or forest remnants. We assume, for the purposes of this study, that all such land is eligible for the creation of Kyoto forest (for further dis...

Ngày tải lên: 08/08/2014, 00:22

... but also others involving the preservation of biodiversity and the landscape, etc., are the lengthening of the rotation, retention of part of the trees in final cutting and, to a lesser extent, the ... with the retention of a portion of the stand in the final cutting, and the extension of rotation to fulfill these non-timber producing objectives in the othe...

Ngày tải lên: 08/08/2014, 01:22

... to the standards set by C et al. (1990), the content of calcium in the second year of needles in all the analyzed groups of stands is on the decrease for the growth of trees and, in the ... to the atmosphere in recent years, the soils of the research area show a higher degree of its presence in forests at high altitudes than in the lower forest z...

Ngày tải lên: 07/08/2014, 10:21

... seem to act by reestab- lishing the original forest composition before the selective pressure of coppice manage- ment. Such a theory was also proposed by other authors (Becker ... (1988) Oak decline alters habitat in southern upland forest. Proceed- ings of the annual conference of the Southeast Asso- ciation of the Fish and Wildlife...

Ngày tải lên: 08/08/2014, 18:21

... only 75%, the lowest value for the study clones; maxi- mum interception for the other 2 clones was intermediate (85%). At the end of the season (mid-November), the 2 parental clones ... Seattle, WA 98195, U.S.A., 2 Institute of Forest Biology, University of Tuscia, 01100 Viterbo, Italy, and 3 Forestry Sciences Laboratory, USDA -Forest...

Ngày tải lên: 09/08/2014, 04:20

... probably elicited by the cortical cells. It is therefore presumed, that the growth pattern is beneficial for the cortical cells as well as for the fungus. By modeling we try ... by the cortical cells, although the plasmalemma of the cortical cells is not enlarged. Acknowledgments The investigations have been supported by grants from...

Ngày tải lên: 09/08/2014, 04:20

... taxoceno- ses structure. Furthermore, they might be a perfect tool for evaluation of changes in forest ecosystems in the future. We confirmed the hypothesis that psocids, as a part of forest ecosystem, ... single habitats of the 7 th AVZ occur in the field of the 4 th and 5 th AVZ. From the view of hydricity (q-axis), habitats of the 7 th AVZ are on the...

Ngày tải lên: 07/08/2014, 03:22

... characteristics change uniformly. For instance, the finest leaves are at the base of young stems. They increase gradually in size along the length of the stem towards the apex. However, the upper leaves ... in the zone of continuous distribution of the species. Some increase in fre- quency of hybridization is noted by the northern boundary of the speci...

Ngày tải lên: 07/08/2014, 03:22

... in the same year at 23% (in 1995–2003 at 11–20%) and 41%, respectively. e situation of Czech forestry is complicated by the fact that the use of production potentials of the forest and forest ... that the economy is built-up by concrete economic agents – forest owners to- gether with business entities engaged in forestry (taking into account the nature of the...

Ngày tải lên: 07/08/2014, 03:22

... the qualitative aspects of features (e.g. damage to the forest stands). At the beginning of the 90’s, forestry mapping changed from the analogue making of the maps with thematic forestry themes ... data for the creation of forest maps and projects for various purposes such as position identification and for the survey of the forest spatial organizat...

Ngày tải lên: 07/08/2014, 03:22