NURSERY MANAGEMENT OF Pinus greggii ENGELM. AND PLANT QUALITY
Seedling quality in a forest nursery refers to the physiological and morphological characteristics which allow plant survival and adaptation to field conditions after transplanting. In this study three cultural practices were compared in independent experiments, during five months, in Pinus greggii Engelm seedlings. Each experiment had 3 treatments with 10 replications, randomly allocated. The experiments were: root pruning (0, 25 and 50 % of root length), top pruning (0, 25 and 50 % of the leaf zone), and preconditioning by edaphic drought stress treatments (irrigation each 3, 14 or 28 days). Root pruning promoted root growth without significantly affecting the stem growth rates in height and diameter, or the biomass accumulation of the shoot or the root. Stem pruning induced significant gains in dry weight, up to 2.5 times in the shoot and up to 3.0 times in the root system, as well as the formation of new roots and branches. Edaphic drought stress reduced plant growth in all the observed parameters. Therefore, stem pruning of 50 % may be recommended as an effective nursery technique to improve seedling quality in this species
| Main Authors: | , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Colegio de Postgraduados
1999
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| Online Access: | https://www.agrociencia-colpos.org/index.php/agrociencia/article/view/1628 |
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| Summary: | Seedling quality in a forest nursery refers to the physiological and morphological characteristics which allow plant survival and adaptation to field conditions after
transplanting. In this study three cultural practices were compared in independent experiments, during five months, in Pinus greggii Engelm seedlings. Each experiment had 3 treatments with 10
replications, randomly allocated. The experiments were: root pruning (0, 25 and 50 % of root length), top pruning (0, 25 and 50 % of the leaf zone), and preconditioning by edaphic drought
stress treatments (irrigation each 3, 14 or 28 days). Root pruning promoted root growth without significantly affecting the stem growth rates in height and diameter, or the biomass
accumulation of the shoot or the root. Stem pruning induced significant gains in dry weight, up to 2.5 times in the shoot and up to 3.0 times in the root system, as well as the formation of
new roots and branches. Edaphic drought stress reduced plant growth in all the observed parameters. Therefore, stem pruning of 50 % may be recommended as an effective nursery technique to
improve seedling quality in this species |
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