摘要:

AbstractOn the relationship between precipitation and fluoride accumulation in coniferous forests under fluoride influence. In forests under the influence of airborne fluorides a relationship of the form F = 2.92 C1.137/P0.508was found. The fluoride accumulation F relates to the F‐contents in dry matter of fir needles (ppm), C means F‐output in tons and P precipitations in mm.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1981.tb00079.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

AbstractEffect of thawing salts on trees and other vegetation. Report to the Forestry Department of the Commission of the European Communities at Brussels. The effects of the chemical composition, the quality, the consumption and the sequences of application of thawing salts, on the soil, on trees and on other vegetation are described. Some conclusions and recommendations are given.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1981.tb00080.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

AbstractDecline of silver fir (Abies alba Mill.) in Poland. On the basis of his own observations and of data from the literature, the author gives a review of silver fir diseases, pests and damage by other biotic and abiotic factors in Poland and on conjectural causes of the decline of this tree species.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1981.tb00081.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

AbstractOn the regeneration and infection of roots of Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) by fungi present in the soil. 167 roots in 4 stands were severed 40–60 cm from the base of the tree. At the proximal cut ends of the thick roots of the 40 years old trees on loamy sand, either replacement roots or callous tissue were formed (only a small percentage of those roots was invaded by rot causing Basidiomycetes), or no new roots and no callus were formed and root rot fungi (Fomes annosus, Coniophora puteana, Resinicium bicolor) had invaded the root sections from the soil. On the root sections of the 35 and 55 years old Douglas firs on sand, with the exception of 2 roots, neither replacement roots nor callus were formed; FomesandConiophorahad invaded the thicker roots of the older trees from the soi

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1981.tb00082.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

AbstractInFomes annosusthe addition of L‐threonine induces specifically branching and septum formation in the leading hyphae of the mycelium. The formation of conidia is stimulated by the combination of light and dark phases and starvatio

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1981.tb00083.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

AbstractThe chemical analysis of needles and wood of roots of trees belonging to four stages of disease caused byA. melleain fertilized (N, P, K, Ca, Mg) and non‐fertilized three Scotch Pine plantations were made. The attack caused gradual interruption of absorption and resulted in the exhaustion of some elements (N, P) and concentration of other ones (K, Ca) in needles and in the decrease of P and transitional growth of Mg‐level in wood of roots. Considerable growth of concentration of some chemical substances in wood of roots of dead trees was observed. This referred to the fertilized and nonfertilized trees as well. The rate of these changes, however, was different after treatment: fertilization had no effect on the concentration of K in needles of trees in intermediate stages of disease, but it influenced in the lower rate the exhaustion of Mg in wood of roots. The role of K and Mg in defensive reactions is discus

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1981.tb00084.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

AbstractMaritime pine (Pinus pinasterAit.) seedlings from four stands of central Italy were inoculated with a suspension of 75,000 basidiospores/ml. Significant differences among the stands were found for the following traits: percentages between nonspotted and inoculated seedlings; and percentages between seedlings with spermagonia ofCronartium flaccidumand spotted seedlings. Genetic variation in blister rust resistance among the stands and among the families within a stand confirms the validity of the idea to select the stands which are exposed to heavy rust infection and then within the selected stands to choose trees able to supply the highest possible number of nonspotted seedlings and seedlings with needle spots but without spermagonia.

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1981.tb00085.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

AbstractCylindrocarpon cylindroides var. tenue as a pathogen of Abies concolor and some Abies hybrids. By artificial inoculations it was proved thatCylindrocarpon cylindroidesWollenw. var.tenueWollenw. is the cause of a disease ofAbies concolorand the progenies of the species‐combinationsA. concolor×A. proceraandA. concolor×A. nordmanniana. The disease finally can cause the death of the tr

ISSN:0300-1237    

DOI:10.1111/j.1439-0329.1981.tb00086.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY