Сводный каталог книг

[Текст] / Authors: C.O.Tamm a.o. - Uppsala : Swedish University of Agricultural Sciences, Faculty of Forestry, 1999. - 129 с. : figures + tables. - (Studia Forestalia Suecica, ISSN 0039-3150 ; 206). - Библиогр: p. 116-126. - ISBN 91-576-5958-3 : 34.00 р.

УДК

06

Аннотация: Long-term field experiments are described, in which nitrogen and other plant nutrients were added regularly to young Scots pine stands at two sites in Sweden, Lisselbo (1969-1988) and Norrliden (1971-1989; some treatments still in progress). A main aim was to establish a range of needle nitrogen concentration levels, as stable as possible, and to study the effects of these and of other factors (other added nutrients, soil acidity changes, irrigation) in tree growth and tree nutrient status. The importance of long-term field experiments in the study of urgent environmental problems, such as nitrogen saturation and soil acidification, is discussed.

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[Text] : научное издание / L. Finer. - Helsinki : The Society of Forestry in Finland-The Finnish Forest Research Institute, 1991. - 42 p. : рис., табл. - (Acta Forestalia Fennica ; vol. 223). - eng. - Библиогр.: 29-31. - ISSN 0001-5636. - ISBN 951-40-1179-1 : 2.00 р.

УДК

06

Аннотация: The fertilized stands accumulated more N,P,K and B than the unfertilized ones during the three-year study period. The increased accumulation corresponded to 35 % (52 kg/ha) of the N applied on the NPK fertilized plots, 10% (6 kg/ha) of the P, 25% (25 kg/ha) of the K and 10% (0.2 kg/ha) of the B on the PK and NPK fertilized plots. The increased amount of B released in litterfall after fertilization was equivalent to 4% of the applied B. Fertilization inhibited the uptake of Mn and Ca.

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