Báo cáo lâm nghiệp: "in leaf development and thesis of Prunus serotina seedlings" doc

... of the variation. The simplest of these models is the linear regression which explained 98% of the variation and does a good job of predicting leaf area from length and ... (Dickmann, 1971). ). Results All of the models tested to predict leaf area from various combinations of leaf length and width had good correla- tions and signif...

Ngày tải lên: 09/08/2014, 04:20

... characteristics and photosynthesis of saline-stressed seedlings of non-halophyte species T. Suzaki H. Yahata H. Shigenaga Laboratory of Silviculture, Department of Forestry, Faculty of Agriculture, ... The objective of the present study was to ex- amine the distribution of salts and its effect on photosynthesis for non-halophyte woody species. In...

Ngày tải lên: 09/08/2014, 04:20

... region of Krušné hory Mts. and in the region of Bohemian-Moravian Upland or in a mu- tual comparison between the two regions (see stand situation 5, mutual comparison of stand situation 2 and ... system development, archi- tecture and health condition in the trees of identical height from planting between the Krušné hory Mts. and the Bohemian-Moravian Upland (see stand sit...

Ngày tải lên: 07/08/2014, 04:20

... petraea and Q cerris that potentially differ widely in drought tolerance (Epron et al, 1993). CARBON ALLOCATION AND WATER STRESS Water stress and leaf development Leaf development ... Dreyer E (1990) Stomatal and non-stomatal limitations of photosynthesis by leaf water deficits in three oak species: a comparison of gas exchange and chlor...

Ngày tải lên: 08/08/2014, 18:21

... between leaf nitrogen, leaf mass per area and photosynthesis in maple and oak trees. Plant Cell Environ 14, 251- 259 Rice EL, Penfound WT (1959) The upland forests of Oklahoma. ... of tem- perature and light on photosynthesis of dominant tree species of a northern hardwood forest. Bot Gaz 149, 203-208 Keever C (1953) Present composition of...

Ngày tải lên: 08/08/2014, 18:21

... the works of Lester [25] and Williams [52] and based on the heteroblasty of shoot development [21]. Seedlings were assigned to the values 0 for the cotyledonary stage, (1) for emergence of the epicotyl ... sig- nificance of those phenotypic changes from the perspective of the phenotypic plasticity of populations and the relationship among the observed changes and species...

Ngày tải lên: 07/08/2014, 16:20

... regen- erated even-aged stand, an uneven-aged stand, a stand with oak un- derstorey (Quercus pyrenaica Willd.) and a plantation. All four stands were situated at altitudes of between 1400 and 1500 m (Tab. ... the stands were first identified by photo-interpretation, visited by experts, and a representative area of each type of structure was delimited. In each of these representati...

Ngày tải lên: 07/08/2014, 16:21

... 6,27]. Removal of the whorl and lateral buds and whorl branches had a more severe effect on plant growth and caused a reduction in root length and DW. Removal of a significant part of the photosynthetic area ... September and shoot DW ended up not significantly dif- ferent from that of the untreated control seedlings. Removal of whorl and lateral buds and whorl branches r...

Ngày tải lên: 07/08/2014, 16:20

... of N and P, and lower return of Ca than coniferous ones. While the amount of poten- tial return of K and Mg show no clear trend between broadleafs and conifers. Initial lignin concentration and ... loss of 14–48%; and the values of k K were much higher than those of k (Tab. V). This indicated initial leaching loss of K because of its solubility. Release of N b...

Ngày tải lên: 08/08/2014, 01:22

... fluctuations of soil moisture and many pests. Localities character- istic of central uplands of the Hrubý Jeseník Mts., where natural spruce stand, spruce stand influenced by silvicultural activities and ... analysis of variance (MANOVA) was applied. CLU and MANOVA were used to evaluate the close- ness of the nutrient status of the spruce stands and to assess the closen...

Ngày tải lên: 07/08/2014, 03:22