חיפוש מתקדם
New Forests
Garau, A.M., Cátedra Dasonomía, Depto. Producción Vegetal, Universidad de Buenos Aires, Av. San Martín 4453 (C1417DSE), Buenos Aires, Argentina
Ghersa, C.M., IFEVA, Depto. Recursos Naturales y Ambiente, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453 (C1417DSE), Buenos Aires, Argentina
Lemcoff, J.H., Institute of Soil, Water and Environmental Sciences, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet Dagan 50250, Israel
Barañao, J.J., Departamento de Tecnología, Facultad de Agronomía, Universidad Nacional de Luján, Rutas 5 y 7 (CC221), Luján 6700, Argentina
The effect of herbaceous vegetation on growth and survival was assessed in planted eucalyptus saplings grown under four levels of weed cover. Seedlings of Eucalyptus globulus subsp. maidenii were planted with 0 (W0), 25 (W25), 50 (W50) and 100% (W100) weed cover. Weed species composition and aboveground biomass was determined. Soil water content was evaluated by the gravimetric method. Seedling leaf area, diameter and height were evaluated at planting and during the 3 months following establishment. Tree height, diameter and stem volume was estimated at 12, 24 and 36 months. First year tree survival was recorded. The ratio of cumulative stem growth under W100: cumulative stem growth under W0 was used to measure competitive performance. Regression analysis was used to determine competition thresholds. Weeds seriously threaten the growth of E. globulus subsp. maidenii. Early negative effects of competition on growth were evident as from the second month after establishment, and both seedlings and 1-year-old saplings were more affected than 2- and 3-year-old ones. A "minimum-response threshold" was determined near 500 kg/ha (corresponding to W25 cover). No clear effect was found between sapling survival and weed biomass. © 2008 Springer Science+Business Media B.V.
פותח על ידי קלירמאש פתרונות בע"מ -
הספר "אוצר וולקני"
אודות
תנאי שימוש
Weeds in Eucalyptus globulus subsp. maidenii (F. Muell) establishment: Effects of competition on sapling growth and survivorship
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Garau, A.M., Cátedra Dasonomía, Depto. Producción Vegetal, Universidad de Buenos Aires, Av. San Martín 4453 (C1417DSE), Buenos Aires, Argentina
Ghersa, C.M., IFEVA, Depto. Recursos Naturales y Ambiente, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453 (C1417DSE), Buenos Aires, Argentina
Lemcoff, J.H., Institute of Soil, Water and Environmental Sciences, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet Dagan 50250, Israel
Barañao, J.J., Departamento de Tecnología, Facultad de Agronomía, Universidad Nacional de Luján, Rutas 5 y 7 (CC221), Luján 6700, Argentina
Weeds in Eucalyptus globulus subsp. maidenii (F. Muell) establishment: Effects of competition on sapling growth and survivorship
The effect of herbaceous vegetation on growth and survival was assessed in planted eucalyptus saplings grown under four levels of weed cover. Seedlings of Eucalyptus globulus subsp. maidenii were planted with 0 (W0), 25 (W25), 50 (W50) and 100% (W100) weed cover. Weed species composition and aboveground biomass was determined. Soil water content was evaluated by the gravimetric method. Seedling leaf area, diameter and height were evaluated at planting and during the 3 months following establishment. Tree height, diameter and stem volume was estimated at 12, 24 and 36 months. First year tree survival was recorded. The ratio of cumulative stem growth under W100: cumulative stem growth under W0 was used to measure competitive performance. Regression analysis was used to determine competition thresholds. Weeds seriously threaten the growth of E. globulus subsp. maidenii. Early negative effects of competition on growth were evident as from the second month after establishment, and both seedlings and 1-year-old saplings were more affected than 2- and 3-year-old ones. A "minimum-response threshold" was determined near 500 kg/ha (corresponding to W25 cover). No clear effect was found between sapling survival and weed biomass. © 2008 Springer Science+Business Media B.V.
Scientific Publication
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