Báo cáo lâm nghiệp: "Physiological, morphological and growth responses to rhizosphere hypoxia by seedlings of North American bottomland oaks" potx

... 400 and 800 μmol m -2 s -1 . Stomatal conductance and Original article Physiological, morphological and growth responses to rhizosphere hypoxia by seedlings of North American ... stomatal and photosynthetic responses of three bottomland tree species. For Sci 32, 914- 923 Ponnamperuma FN (1984) Effects of flooding on soils. In:...

Ngày tải lên: 08/08/2014, 18:21

... ring width and the standardized vessel diagram. In fact, profiles relative to years 1952 and 1953 appear more similar to each other than they do to years 1951 and 1953, ... residuals and total mean annual precipitation and the mean annual temper- ature, both arranged from October of year t-1 to September of year t. There are many p...

Ngày tải lên: 08/08/2014, 18:21

... Italian and French sites. The only major source of dif- ference seems to be between the DBH rep- artition of all trees of each of the six sites, which induced us to consider ... studied in Spain, and some of those of France, had smaller DBH in comparison to some trees felled in Italy. Stand biomass estimates As two of the Etna st...

Ngày tải lên: 08/08/2014, 18:21

... fumigation of spruce (Picea abies (L.) Karst.) seedlings and young plants with P-pinene resulted in a monoter- pene concentration- and photofluency- dependent destruction of chloroplast ... to the experimental treatments, the seedlings had been cultivated in groups of 50 on a 3:1 mixture of quartzsand and vermiculite irrigated with tap wat...

Ngày tải lên: 09/08/2014, 04:20

... result of the different timing of shoot and root growth, and the impor- tance of current photosynthate to new root growth [32]. After budbreak, provided that seedlings are not exposed to severe drought, ... from –0.96 MPa to –2.22 MPa, indicating probably down-regulation of primary photochemistry and the augmentation of photoprotective mechanisms to avoid overre-...

Ngày tải lên: 08/08/2014, 00:21

... for an adequate asymptote estimation due to the absence of old stands, probably as a result of the traditional use of Q. pyrenaica stands for firewood and charcoal. In spite of the apparent differences ... treatments that need to be carried out in each of them. At present, due to the state of abandonment and decay in which many of these stands have fallen [10, 12], it is...

Ngày tải lên: 07/08/2014, 16:20

... F-values and significance of analysis of variance and RGP values for each test according to the stocklot factor (CA, CL, FA, GE, HT and HU). Mean values and standard error . In the same column, stocklots ... be conducted in growth chambers due to root growth susceptibility to low temperatures and to be able to complete the test in a short period of time (10 days)....

Ngày tải lên: 07/08/2014, 16:21

... cover and a well developed understory of annual grasses. They occupy 275 000 ha (58% of the total surface of Spanish cork oak stands) and produce 48 000 t of cork, which corresponds to 54% of the ... 000 ha (42% of the total surface) and produce 41 000 t of cork (46% of the total production) [27, 41]. According to Dewar [16], models can contribute directly to the...

Ngày tải lên: 08/08/2014, 00:22

... area and above- and belowground growth responses of loblolly pine to nutrient and water additions, For. Sci. 44 (1998) 317–328. [3] Beaudet M., Messier C., Growth and morphological responses of yellow ... radiation data (MJ m –2 d –1 ) of Tõravere Actino- metric Station, and a conversion factor of 1.92 mol/MJ [53] were used to transform the values of I sum...

Ngày tải lên: 08/08/2014, 01:21

... used to increase root growth potential and thereby improve the survival and growth of seedlings used in reforestation. 5. CONCLUSION The results of this trial improve the understanding of how seedlings ... and to count needle primordia in the buds of 13 to 30 randomly selected seedlings (averaging 20) per treatment each week. Weekly height growth was assessed...

Ngày tải lên: 08/08/2014, 01:21