Soil and lodgepole pine foliar responses to two fertilizer sulphur forms in the Sub-Boreal Spruce zone, central interior British Columbia
| Autor: | R P Brockley, P T Sanborn, J Prietzel |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Pinus contorta
Global and Planetary Change Ecology biology Soil chemistry Forestry engineering.material biology.organism_classification Mineralization (biology) Soil management chemistry.chemical_compound Agronomy chemistry Botany Soil water engineering Environmental science Ammonium Fertilizer Soil fertility |
| Zdroj: | Canadian Journal of Forest Research. 35:2316-2322 |
| ISSN: | 1208-6037 0045-5067 |
| DOI: | 10.1139/x05-138 |
| Popis: | Sulphur (S) fractions, total nitrogen (N) concentrations, and cumulative net S mineralization of forest floors and surface mineral soils (0-20 cm) were measured 13 years after an S-deficient lodgepole pine (Pinus contorta var. latifolia Engelm.) stand was fertilized (100 kg S·ha1 + 400 kg N·ha1) in 1990. Fertilizer treatments compared two S sources: elemental S (S0) and ammonium sulphate (AS). Total S and ester sulphate-S (SO4-S) concentrations and cumulative net S mineralization in forest floors were significantly higher in the S0 treatment than in the control and AS treatment. Except for a slight elevation of extractable SO4-S, such differences were absent in the mineral soils. Total S and SO4-S concentrations in current-year (2002) pine foliage from the S0 treatment were significantly higher than in foliage from the control and AS treatment, while foliar N concentrations indicated that all treatments had caused a return to N-deficiency. These results indicate that prolonged amelioration of S deficiencies in lodgepole pine stands in central interior British Columbia may be possible with single applications of S0. |
| Databáze: | OpenAIRE |
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