Báo cáo lâm nghiệp: "Carbon accumulation in Finland’s forests 1922–2004 – an estimate obtained by combination of forest inventory data with modelling of biomass, litter and soil" potx

... stock of litter and soil and its annual changes in Finland’s forests between 1922 and 2004. The black lines show these variables when the transfers of carbon in litter and soil between forests and ... uses in Finland’s forests between 1922 and 2004. Figure 6. Annual changes in the carbon stock of litter and soil in Fin- land’s forests between 19...

Ngày tải lên: 07/08/2014, 16:20

... glu- coneogenesis and thus TP are diverted into starch synthesis. In July, in contrast, an opposite situation emerges with decreased amounts of F6P and F26BP and high levels of TP. ... the rate of starch synthesis is controlled by the rates of sucrose formation and trans- port. Metabolites involved in the regulation of carbon partit...

Ngày tải lên: 09/08/2014, 04:20

... that clearfelling of hardwood and spruce forests in USA caused an increase of between 5 and 14% in bulk density in the top 20 cm of mineral soil. The increase depended on the severity of the disturbance. In ... stands in Canada. Smethurst et al. [23] Figure 3. Soil C (t ha –1 ) in litter, organic and mineral layers of three paired plots in 40-yr stands...

Ngày tải lên: 08/08/2014, 00:22

... overestimated and might in fact be rather low. This effect is linked to a far larger decrease of the standing volume of trees (and thus carbon) in the forests and of soil carbon because of the ... effects of an increased use of wood within technosphere. One important effect of an increased use of wood was neglected: the decline of the carbon storage in the...

Ngày tải lên: 08/08/2014, 00:22

... was steeper than that in RSA N resulting in a significant decrease in the ratio of the two. 3.4. Seasonal changes in content and partitioning of winter C and N in plants Winter C and N represent ... Remobilisation of stored C and N in cork oak 727 Figure 1. Total (open bars) and winter (closed bars) carbon in first and second year leaves, branches, stem, coa...

Ngày tải lên: 08/08/2014, 01:22

... allocation within the plant and cycling within the plant may differ between and among deciduous and evergreen trees in many details, the major seasonal patterns of carbon and nitrogen ... and glutamine; the amino acids, glutamate, aspartate, arginine and proline; and the ureides, allantoin, allantoic acid and citrul- line, are common and...

Ngày tải lên: 09/08/2014, 04:20

... rates of LP-M plants with HP-N and HP-M plants, without a concomitant increase in dry matter, may suggest a substantial respiration cost of the mycorrhizas. Mycorrhizal inoculation ... of seedlings grown with the high phosphorus fertilizer regime caused: 1 ) only a small increase in phosphorus content and concentration within the plant; 2)...

Ngày tải lên: 09/08/2014, 04:20

... both yellowing and green seedlings were planted in the soil from the decomposing stand and compared with both yellowing and green seedlings planted in the soil from the beech stand (Table ... seedlings planted in the sub- strate from the beech stand (without the in uence of acid litter) . In the case of P and K we observed significant dif - ferences between variants...

Ngày tải lên: 07/08/2014, 03:22

... forest stands, with a share of 88.7% in the number of trees and 84.9% in the total stand volumes. Additional tree species include fir (5.7% in the tree count and 9.5% in stand volumes) and sycamore ... W., 1994. Structure and dynamics of lower subalpine timber stands of Carpathian Mts of primeval character. In: Research and Management of the Carpathian...

Ngày tải lên: 07/08/2014, 03:22

... of dieback and species spectrum are close to qualitative changes in the phloem and the structure of fauna on standing spruce breaks in stands of the 2 nd and 3 rd age classes but also in ... standing trees maintain higher relative air hu- midity in the stand, do not hinder the development of newly planted seedlings and their eventual break-up and decomposition...

Ngày tải lên: 07/08/2014, 03:22