Variación entre procedencias y respuesta a la poda química en plántulas de Pinus Greggii (original) (raw)

The response to chemical root pruning on seedlings from nine provenances from the two regions (varieties) of Pinus greggii Engelm. was evaluated in the nursery and in the field. Seedlings were grown for six months in a greenhouse in copper-treated or untreated containers. Chemical root pruning improved seedling height, root collar diameter and shoot dry weight compared to non-treated seedlings, both in the nursery and in the field. After nine months in field conditions at New Mexico, copper-treated seedlings were 5% taller, had 4% larger root collar diameter, 8% and 3.6% higher shoot and root dry weight, respectively, and higher survival (90 vs. 87%). Significant differences were found between seedlings from northern and southern provenances in greenhouse and field. Seedlings from southern region were 71% taller, had 7% larger root collar diameter, and had 23% more shoot dry weight than seedlings from northern provenances after nine months in the field. However, root dry weight was 14% higher in northern seedlings. Consequently, seedlings from northern provenances had higher root:shoot ratios (0.38 vs. 0.27) and higher survival (94 vs.

Sign up for access to the world's latest research.

checkGet notified about relevant papers

checkSave papers to use in your research

checkJoin the discussion with peers

checkTrack your impact