9789401054348 - management of nutrition in forests under stress: proceedings of the international symposium, sponsored by the international union of forest research ... at the albert-ludwigs-university in freibu (4 Ergebnisse)
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Taschenbuch. Zustand: Neu. Management of Nutrition in Forests under Stress | Proceedings of the International Symposium, sponsored by the International Union of Forest Research Organization (IUFRO, Division I) and hosted by the Institute of Soil Science and Forest Nutrition at the Albert-Ludwigs-University in Freibu | Oleg I. La…richev (u. a.) | Taschenbuch | Einband - flex.(Paperback) | Englisch | 2012 | Springer Netherland | EAN 9789401054348 | Verantwortliche Person für die EU: Springer Netherlands, Haberstr. 7, 69126 Heidelberg, buchhandel-buch[at]springer[dot]com | Anbieter: preigu.
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Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - During the 1970s and 1980s, Sitka spruce (Picea sitchensis, Bong. Carr. ) was planted extensively on northern Vancouver Island (B. C. , Canada) to regenerate slashburned clearcuts previously occupied by old-growth Thuja p1icata, Donn, Tsuga heterophy…11a, Raf. Sarg. , and an ericaceous unders tory shrub salal (Gaul ther ia sha11on, Pursh [CH sites 1 ) . The planted Sitka spruce grew well initially on these sites, but experienced nutritional stress and reduced growth 8 to 14 yr after planting (Germain, 1985; Weetman et a1. , 1990a,b). Accompanying the onset of the nutritional stress was the reestablishment of a complete ground cover of salal, and it has been suggested that there is a causal connection between these two temporally synchronous events (Weetman et al. , 1990a,b). Other ericaceous species have been implicated in nutritional stress in conifer plantations (Mallik, 1987; Robinson, 1972; Handley, 1963; Rose et a1. , 1983). Three hypotheses to explain this nutritional stress were tested in the study reported in this paper: (1) that salal competition for N can provide an adequate explanation for the observed nutritional stress; (2) that salal inhibits the availability of nutrients to seedlings by interfering with their mycorrhizae; and (3) that the fertility of these CH sites declines after 8 yr following clearcutting and slashburning due to the termination of the flush of nutrients (or 'assart effect') associated with this disturbance. A series of pot and field experiments was carried out to test these hypotheses. 1 2.
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Paperback. Zustand: Brand New. 1990 edition. 692 pages. 9.50x6.30x1.50 inches. In Stock.
