ISSN:
1573-5095
Keywords:
conifer nutrition
;
genotype × environment interaction
;
nutrient productivity
;
nutrient use efficiency
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract Seedlings of nine controlled crosses of westernhemlock (Tsuga heterophylla (Raf.) Sarg.) withknown differences in growth rate after six years inthe field were grown for one year, and then subject tothree nutrient treatments. Nutrient treatments variedthe amount of nitrogen (N) and phosphorus (P) innutrient solutions as follows (N:P): 20:4 mgL−1,100:20 mgL−1, and 250:60 mgL−1. Nutrientsolutions were used to subirrigate pots containing theseedlings in a peat:perlite medium for two growingseasons. Biomass and foliar N and P concentrationsincreased while nutrient productivity (biomass/shootN content) decreased with increasing nutrient supply. The nine crosses were divided into fast, medium andslow-growing parental ranks. There was a significantparental rank × nutrient treatment interaction forshoot and total biomass, and root:shoot ratio. Theresults indicate that tree improvement programs forwestern hemlock should plant progeny trials on sitesof different fertilities to examine relative responseof crosses.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1006781609922
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