Titlebook: Nutrient Uptake and Cycling in Forest Ecosystems; Proceedings of the C L. O. Nilsson,R. F. Hüttl,U. T. Johansson Conference proceedings 199

平庸的人或物

巨大沒(méi)有

Nitrogen mineralization and potential nitrification at different depths in acid forest soilssts in S Sweden and E Denmark for determination of net N mineralization and potential nitrification. The samples were sieved while still fresh and incubated at a constant temperature (15°C) and soil moisture for 74–117 days with periodic subsamplings. Net N mineralization rates, expressed per g orga

說(shuō)笑

tooth-decay

Effects of forest fertilization on nitrogen leaching and soil microbial properties in the Northern Cg) may pose nitrate problems for the groundwater or decrease microbial activity..With the aim to investigate potential nitrogen leaching after fertilization we set up an experiment employing intact soil cores (11 cm diameter, 20–40 cm long) from a mixed forest and a . stand (soil type Rendsina) in t

機(jī)構(gòu)

退出可食用

Decomposition and nitrogen dynamics of fine roots of Norway spruce (, (L.) Karst) at different sitesroot litter-bag techniques. The seasonal decomposition of the finest roots was investigated in a 40-year-old high site quality stand grown on brown lessive soil at different depths as part of productivity studies. The fine root decomposition studies were conducted on 8 permanent plots in the Estonia

搖擺

Quantification of ammonium sorption in acid forest soils by sorption isothermse soil profile. Two haplic podzols (originating from Phyllite and Granite) from the German Fichtelgebirge were used. Exchange isotherms were obtained from batch experiments with NH.. concentrations between 0.01 to 0.6 mmol NH.. L.. Background solutions had a composition close to the natural soil sol

名詞

Soil changes in different age classes of Norway spruce (, (L) Karst.) on afforested farmlandhe A- horizon of land previously used in agriculture, and that such soil changes depend on stand development. The investigation was evaluated as a completely randomised design with three treatments representing different age classes of trees: 20 years (Y20), 40 years (Y40) and 55 years (Y55). Eighte

Anhydrous

Generalize

Measurements of abundances of 15N and 13C as tools in retrospective studies of N balances and water dances of .N and .C, respectively, are discussed. Most evidence is from the Swedish Forest Optimum Nutrition Experiments, which have been running for two decades. Annual additions of N have been given either alone or in combination with other elements, notably P and K, every third year. Processes le