Báo cáo lâm nghiệp: "Influence of herbaceous competitors on early growth in direct seeded Fagus sylvatica L and Quercus robur L" ppt

... 781–788 © INRA, EDP Sciences, 2005 DOI: 10.1051/forest:2004075 zOriginal article Influence of herbaceous competitors on early growth in direct seeded Fagus sylvatica L. and Quercus robur L. Magnus L F*, ... and above herbaceous competitors (0.3 m and 1.5 m) in the middle of July in 1995 and in August 1996 and 1997 on ten locations per trea...

Ngày tải lên: 08/08/2014, 01:22

... weight in relation to environmental conditions in California, Ecology 53 (1972) 997–1010. [5] Bonfil C., The effects of seed size, cotyledon reserves and herbivory on seedling survival and growth in ... Number of replications in each experiment, stage of growth and experimental conditions. Factorial experiment Harvest at different stages of growth Full light Shad...

Ngày tải lên: 08/08/2014, 01:21

... to flush in late April or early May, while autumn leaf coloring starts in late October. 2.2. Micrometeorology and soil moisture content Meteorological conditions were monitored from scaffolding ... RESULTS AND DISCUSSION 3.1. Forest microclimate and variations in soil moisture content Daily rainfall (P day ) in late summer was extremely low with no measured rainfall between...

Ngày tải lên: 08/08/2014, 00:21

... chemicals in plant cuticles. Rev Environ Contam Toxicol 108, 1-70 Original article Influence of marine salts on the localization and accumulation of surfactant in the needles of ... sulfonate could accumulate in the leaf cuticle of P halepensis Mill after a 2 min immersion of the foliage in a saline solution of LABS simulating a storm...

Ngày tải lên: 08/08/2014, 18:21

... were not observed in leaves harvested in mid- August. Chlorophyll content The chlorophyll content of early leaves was also influenced by the light conditions of year n (Fig. ... were less noticeable in early leaves harvested later, and were no longer significant in late leaves. Discussion All analyzed characteristics (structure, anatomy and...

Ngày tải lên: 09/08/2014, 04:20

... ‘quenching shift rate’ declined as well. Overall, Quercus alba seedlings demonstrated strong growth and allometric responses to light intensity. white oak / shade tolerance / biomass allocation ... réponses allométriques à l intensité de l éclairement. Quercus alba / tolérance à l ombre / répartition de la biomasse / fluorescence modulée de la chlorophylle / acclimatation à la lu...

Ngày tải lên: 08/08/2014, 00:22

... 1995 and were 1 year when they were planted on an area of around 5 ha, on a shallow, stony, chalky soil. The planting alternated one row of one-year seedling pines and five rows of vines. The pines ... during an uninterrupted elongation phase. The growth units of the genus Pinus, which are clearly structured with three main zones –a scale leaves zone, a brachyblastes (dwarf...

Ngày tải lên: 08/08/2014, 01:21

... had little effect on the height of loblolly pine seedlings. Longleaf pine, however, showed a much larger increase in both height and seedling dry weight than loblolly pine ... in dry mat- ter accumulation by seedlings; root collar diameter is a more useful indicator of seedling size. Taller seedlings generally remain taller in the years fol...

Ngày tải lên: 09/08/2014, 04:20

... cell enlargement. Two cellular processes may be involved in tur- gor maintenance: variation in cell wall elasticity and/ or accumulation of intracellu- lar solutes. Actually, ... and Lamant, 1989), a more intense osmoregulation was found in root apices of young seed- lings of the Tamjoute population compared to seedlings of the Landes populat...

Ngày tải lên: 09/08/2014, 04:20

... regional index residual tree-ring chronology was created in the ARSTAN application. e chronol- ogy has low values of autocorrelation. e standard regional tree-ring chronology was also established. ... evaporation in- tensively and the following decrease in soil moisture in the top ground layer then reduces the creation of nutrients and also water availability during the f...

Ngày tải lên: 07/08/2014, 03:22