Effect of Undercutting and Wrenching on Growth of Pinus radiata D. Don Seedlings

Rook, D. A.

doi:10.2307/2402884

Cited by 48 publications

(14 citation statements)

References 12 publications

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“…Several authors (Brouwer, 1983;Brouwer and Dewit, 1969;Kramer and Kozlowski, 1979) have proposed that a functional equilibrium exists in plants and that after a portion of either the root or shoot system is removed, the growth of the remaining part is invigorated, which restores the root/ shoot balance. Short-term studies with small potted plants demonstrate a redistribution of growth and translocation of assimilates in favor of the root system following root pruning (Geisler and Ferree, 1984;Ghobrial, 1983;Rook, 1971;Schupp and Ferree, 1990). However, overall plant dry weight was reduced by root pruning in these studies.…”

mentioning

confidence: 82%

Root Distribution following 9 Years of Root-pruning `Me1rose'/M.26 Apple Trees

Ferree¹

1994

HortSci

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`Melrose'/M.26 apple (Malus domestics Borkh.) trees were mechanically root-pruned annually for 9 years at bloom to a 25-cm depth at 80 cm from the trunk on two sides. An evaluation of the number of roots of four size categories on the exposed wall of a 1.2 x 2-m trench located 1 m from the trunk indicated that root pruning caused a reduction in all root size categories. Roots < 1 mm in diameter were reduced 20% by root pruning, while the reduction in larger roots was nearly double this amount. The effect of root pruning on root distribution was greatest in the top 30 cm of soil, parallel to the location of the root-pruning cut. Roots below 30 cm were unaffected. The number of roots in all size categories in samples taken parallel and perpendicular to the row decreased linearly with soil depth.

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mentioning

confidence: 82%

Root Distribution following 9 Years of Root-pruning `Me1rose'/M.26 Apple Trees

Ferree¹

1994

HortSci

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“…A pretransplant increase in the root:shoot ratio of young plants (liners) is considered advantageous for outplanting (Kozlowski and Pallardy, 1997). Increased ratios usually result when liners are root pruned during production (Hipps et al, 1997;Rook, 1971;Tanaka et al, 1976), although some studies reported no effect (Duryea and Lavender, 1982;Hipps et al, 1997). Root pruning field-grown landscape trees is also a recommended practice (Watson, 1986).…”

mentioning

confidence: 99%

Root Pruning Pin Oak Liners Affects Growth and Root Morphology

Harris¹,

Niemiera²,

Fanelli³

et al. 2001

horttech

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Two experiments tested the effects of root pruning on growth during first-season production of pin oak (Quercus palustris Muenchh.). Experiment one tested the effect of root pruning developing radicles at 5, 10, or 15 cm (2, 4, or 6 inches) below the substrate surface. After 11 weeks, total root length was not affected by root pruning, but root-pruned seedlings had more main lateral [>2-mm (0.08-inch) diameter] roots than those that were not root pruned. Shallow pruning increased the number of main lateral roots. Experiment two tested the effect of initially producing plants in different-depth bottomless containers [5, 10, 15, or 20-cm (2, 4, 6, or 8-inch) depth] on growth after transplanting to #2 [6 L (1.6 gal)] containers. Shoot and root growth in #2 containers were lowest when plants were originally produced in 5-cm-deep containers. Plants with the greatest height and highest root:shoot ratios were obtained when plants were grown initially in 10-cm-deep containers. Predicted optimum depth of bottomless containers from regression equations ranged from 11.3 cm (4.5 inches) to 14.2 cm (5.5 inches) for the different growth parameters measured. The importance of these findings are: Pruning developing radicles of pin oak seedlings increases the number of main lateral roots but not overall root length. Growers can maximize growth in #2 containers by initially growing in 10-cm-deep bottomless containers before transplanting to #2 containers.

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“…Las plantas sin acondicio namiento superan en promedio en un 40 y 12% r e s p e c t i v a m e n t e en a l t u r a y d i á m e t r o a l a s plantas acondicionadas. Estos resultados son con sistentes con los obtenidos por distintos autores (Rook, 1971; V a n Dorsser y Escobar y Rivera, 1985).…”

Section: Las Plantas Acondicionadas Más Tempranamenunclassified

“…N u m e r o s o s autores (Cameron y Rook, 1969;Rook, 1969Rook, , 1971Rook, , 1973Van Dorsser y Moberly, 1971;Will et al, 1971 Benson y Shepherd, 1977;Chavasse, 1980;Duryea, 1984;Escobar y Rivera, 1985;Shepherd, 1986;Liegel y Venator, 1987;Escobar y González, 1987) han estudiado en detalle los efectos de esta labor cultural, las modificaciones que origina en los atri butos morfológicos y fisiológicos de las plantas en vivero y su comportamiento en terreno, respecto a supervivencia y crecimiento. Es así c o m o existe abundante evidencia en relación a que las técnicas de acondicionamiento de las plantas en vivero con ducen a la obtención de un material de plantación más resistente, capaz de soportar el estrés que ocu rre entre la extracción del vivero y la plantación en terreno (Armitage, 1969cit., por Chavasse, 1980.…”

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