Use of belowground growing degree days to predict rooting of dormant hardwood cuttings of Populus
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Silvae Genetica. 53: 154-160.
Planting Populus cuttings based on calendar days neglects soil temperature extremes and does not promote rooting based on specific genotypes. Our objectives were to: 1) test the biological efficacy of a thermal index based on belowground growing degree days (GDD) across the growing period, 2) test for interactions between belowground GDD and clones, and 3) identify beneficial planting windows based on combinations of genotypes and belowground GDD. We tested two clones of Populus deltoides Bartr. ex Marsh (D133, D134) and four hybrid clones of P. deltoides x P. maximowiczii A. Henry (DM101, DM105, NC14105, NC14107).
KeywordsPopulus deltoides; P. maximowiczii; hybrid poplar; soil temperature; genotype x environment interaction
Zalesny, R.S., Jr.; Bauer, E.O.; Riemenschneider, D.E. 2004. Use of belowground growing degree days to predict rooting of dormant hardwood cuttings of Populus. Silvae Genetica. 53: 154-160.