Báo cáo khoa học: "Influence of browsing cessation on Picea sitchensis radial growth" pdf

... precising deer browsing consequences on growth regeneration of Picea sitchensis. Using ring-width series, an empiricalmodel is built which describes browsing impact on radial growth and removal of these ... when itis present, little browsing occurs on Picea sitchensis. Coates et al. (1985) studied the effectof deer browsing in HaidaGwaii and found few browsing loss...

Ngày tải lên: 08/08/2014, 14:21

... 1992, 76(6), 979~984. 8. Jones, R.S. and Snowdon, S.L. Experimental inve- stigation of the cardiovascular and respiratory effects of increasing concentrations of isoflurane in the dog. Res. Vet. ... between the isoflurane-anesthetized and the conscious dogs. In conclusion, the isoflurane anesthesia did not influence the PI and PSV in the basilar artery of dogs. Key words: Dog, Doppler...

Ngày tải lên: 07/08/2014, 15:20

Ngày tải lên: 07/08/2014, 18:21

... was only small. Hamilton and Johnson (1978) demonstrated the decreasing availability of NO -3 because of its absorption to the sub- strate. Optimal availability of NO -3 was found ... optimum addition of Osmocote, its effects on rooting and shoot growth should be considered. But high concentrations should be avoided to re- duce leaching of NO...

Ngày tải lên: 08/08/2014, 19:21

... Samples of spodic horizons consisted of a uniform column of soil cut by a trowel from the top of the horizon to a depth of 10 cm. A total of 10 samples per pedon and ... used for further fractionation into humic and fulvic acid fractions, with each being analyzed for carbon content. The methods of sequential fractionation are described...

Ngày tải lên: 08/08/2014, 19:21

... que les conditions météorologiques et la disponibilité offerte interfèrent sur le ré- gime alimentaire du Cerf. Dans les deux cas, on constate : - une consommation importante ... this view. In the case of roe deer, Maillard (1984) also found a high consumption of acorns, reaching 87% (by weight) of the rumen contents. Jackson (1977, 1980), F...

Ngày tải lên: 08/08/2014, 23:22

... efficient stomatal control of transpirational water loss. This result is consistent with previous studies on Pinus nigra and confirm the water stress adapta- tion of this collective ... table I. No fertiliza- tion was applied because chemical composi- tion corresponded to optimal conditions of plant nutrition [36]. At the beginning of March 19...

Ngày tải lên: 09/08/2014, 04:20

... type consists of a dark-brown carbonated A horizon (15 to 20 cm thick) with 40 to 60% of stones, on a fragmented C hori- zon. The calcisol type consists of a dark-brown carbon- ate-free A horizon ... estab- lishment and growth of seedlings in natural regeneration is to study the response of seedlings to both types of variation. The effects of the degree of canopy closure on...

Ngày tải lên: 08/08/2014, 14:21

... devel- opment of brain, skull and extremities. References 1. Beir, V. Health effects of exposure to low levels of ionizing radiation. Biological effects of ionizing radiations. Washing- ton, National ... Protective effect of selenium against ionizing radiation-induced malfor- mations in mice. Acta Radiol. Oncol. 1985, 24, 267-271. 5. Committee on the biological effects of radiat...

Ngày tải lên: 07/08/2014, 14:23

Ngày tải lên: 07/08/2014, 18:21