Browsing by Author "KUMMEROW, J"

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    EFFECT OF FERTILIZER ON FINE ROOT DENSITY AND SHOOT GROWTH IN CHILEAN MATORRAL
    (1982) KUMMEROW, J; AVILA, G; ALJARO, ME; ARAYA, S; Montenegro Rizzardini, Gloria
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    GROWTH DYNAMICS OF CHILEAN MATORRAL SHRUBS
    (1979) Montenegro Rizzardini, Gloria; ALJARO, ME; KUMMEROW, J
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    ROOT STUDIES IN CHILEAN MATORRAL
    (1978) HOFFMANN, A; KUMMEROW, J
    The roots of matorral shrubs were excavated from an 18 m2 site of a mixed matorral stand located on a 27.degree. northeast facing slope at 1000 m elevation 40 km north northwest from Santiago (Chile). The climate in this area is similar to that of the southern Californian [USA] chaparral. The main species present were Lithraea caustica, Cryptocarya alba, Colliguaya odorifera, Mutisia retusa and Satureja gilliesii. After harvesting the above ground biomass, the soil was washed out in 20 cm layers down to a depth of 60 cm. The roots were harvested according to their position in the site, separated into species and root size classes. Soil analysis indicated a fertile and deep reaching, clayish soil. L. caustica was a deep rooting species with many thick roots growing deeper than 60 cm. This species had a massive burl of 67 kg dry wt in the excavation site. Cryptocarya was less deep rooting and C. odorifera had a shallow root system. The root:shoot biomass ratios of 4.9 and 1.4 for L. caustica and C. alba, respectively, are indicative of the forest character of this site in the past. This forest would have been destroyed by continuous charcoal manufacture. The bulk of the fine roots was found in the 20-40 cm soil layer. The average distance between fine roots was calculated as 1.9 cm. The results were compared with an earlier excavation in the Californian chaparral.
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    SEASONAL CAMBIUM ACTIVITY OF CHILEAN AND CALIFORNIAN SHRUBS
    (1975) AVILA, G; ALJARO, ME; ARAYA, S; Montenegro Rizzardini, Gloria; KUMMEROW, J
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    SECONDARY ROOT AND STEM GROWTH IN A CHILEAN MATORRAL SHRUB (COLLIGUAYA-ODORIFERA-MOL)
    (1978) AVILA, G; ARAYA, S; RIVEROS, F; KUMMEROW, J
    The annually produced xylem of an individual shrub of C. odorifera Mol. (Euphorbiaceae) was analyzed for 4 consecutive years (1972-1975). In addition to the primary growth, secondary thickening growth in stems and roots contributed to about 20% of the biomass produced. A survey of the shrub''s bark biomass (all tissue peripheral to the vascular cambium) showed that contributions to biomass by bark in smaller branches and roots (diameter < 0.5 cm) were 56 and 90%, respectively, while in larger stems and roots (diameter > 0.5 cm) bark contributions to the dry wt were 22 and 53%, respectively.