Báo cáo lâm nghiệp: "Biomass, litterfall and nutrient content in Castanea sativa coppice stands of southern Europe" ppt

... 99.6 Mg ha-1 ; San Original article Biomass, litterfall and nutrient content in Castanea sativa coppice stands of southern Europe S Leonardi 1 I Santa Regina M Rapp 4 HA Gallego 3 M ... VII. This indicates again that there was much higher calcium content in the litterfall in the Etna Castanea sativa stands as compared to the San Mar...

Ngày tải lên: 08/08/2014, 18:21

... 149 derplantings increases with a decreasing content of these nutrients in needles. An opposite correlation was determined for aluminium: with an increasing proportion of this element in nutrition ... diminishing proportion of C ox in Ae/Ep horizons the content of basic nutrients decreases there (Fig.3).  e proportion of humus substances (C ox ) in the organomin...

Ngày tải lên: 07/08/2014, 10:21

... by hand only partially, and then, remaining leaves had to be collected in a net enclosing the crown as and when they were naturally falling until the end of leaf fall (DOY 306 and 296 in 1994 and ... the end of the growing season in 1994 to the end of the next one in 1995. In 1995, three trees of variable competitive status and aged 25 were studied. Stem, branch a...

Ngày tải lên: 08/08/2014, 01:22

... Spain (Fig. 1). Two of these fires occurred in the provinces of Barcelona and Tarragona (NE Spain), where 50 000 ha and 12 500 ha were burned, respectively, and the other two in the provinces of ... provinces of Albacete and Murcia (SE Spain), where 14 000 and 30 000 ha were burned. In all of these areas, natural regen- eration resulted in high-density stands of...

Ngày tải lên: 07/08/2014, 16:21

... the cytokinin content in the shoot. In discussing the elevated content of cytokinin ribosides in shoots of seedlings grown on STRESS-AlCl 3 – and STRESS- NAA-medium, we assume that the increased ... 2A and 2B it is obvious that in almost all shoot samples the content of isopentenyladenosine is higher than the content of the zeatin riboside. Comparing the content...

Ngày tải lên: 08/08/2014, 00:22

... plants growing in saturated soil is often ascribed to of seedlings established in hypoxic nutrient solution. Seedlings established in normoxic nutrient solution grew 131 % larger in ... RL (1981) Flood tolerance and related characteristics of trees of the bottomland forests of the southern United States. In: Wetlands of Bottomland Hard...

Ngày tải lên: 08/08/2014, 18:21

... and turf and 50% sand; they were then maintained in the nursery, with a plant density of 30 plants/m 2, in Florence, during the winter and the following growing season. ... sprouting in F sylvatica seedlings in spring also depended upon prior chilling received. Fa- lusi and Calamassi (1990), also working with seedlings, found that chillin...

Ngày tải lên: 08/08/2014, 18:21

... University, Fukuoka, Japan Introduction Information about water flow resistance is essential to understanding and simulating water movement in trees (Yahata, 1987). There are a number of papers ... long and to find a simple equation to predict the effect of stem form on it. Materials and Methods 14 yr old C. japonica trees growing in a plan...

Ngày tải lên: 09/08/2014, 04:20

... the seedlings had been cultivated in groups of 50 on a 3:1 mixture of quartzsand and vermiculite irrigated with tap water. Cultivation took place in glass vessels in continuous ... products of secondary metabolism in conifers, could play a role in forest decline. Monoterpenes are synthesized in leuco- plasts at the basis of needles and...

Ngày tải lên: 09/08/2014, 04:20

... interpretation of the data is that the efficiency of root system in terms of plant growth remains stable at least in that first growing period of plant in the forest disregarding their functions of conduction ... explaining 92% of the relationship. An adequate proportion of fine roots (thinner than 2 mm) in the root system is another important parameter of planting s...

Ngày tải lên: 07/08/2014, 03:22