A qualidade morfológica de mudas de Pinus taeda afeta o seu crescimento em campo no longo prazo?

Trazzi, Paulo André; Santos, Juscelina Arcanjo dos; Dobner, Mário; Higa, Antônio Rioyei; Roters, Diego Fernando; Caldeira, Marcos Vinícius Winckler

doi:10.18671/scifor.v48n127.04

Cited by 1 publication

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“…A few studies followed tree growth until the middle to the end of rotation, many of them in the Pinus plantation [39][40][41]. The authors of [31] found a reduction of 42% of the mean annual increment from the best to the worst treatments (25 × 43 m 3 ha −1 yr −1 ) in Pinus taeda at 9 years after planting. This study showed that one of the main reasons for the loss of productivity was the age of seedlings, corroborating our results, where treatment D had 12% less productivity.…”

Section: Discussionmentioning

confidence: 99%

“…A randomized block design was carried out with four treatments and four repetitions, with a total of 16 plots. In our study, treatment refers to the morphological condition of seedlings, as it was applied by Pezzuti and Caldato (2011) [30] and Trazzi et al (2020) [31]. The plots were represented by 81 plants (9 rows × 9 plants), with a useful area containing 25 plants in the central region of the plots (5 rows × 5 plants).…”

Section: Experimental Designmentioning

confidence: 99%

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Seedling Morphological Characteristics on Survival, Uniformity, and Growth during a Full Short Rotation in Eucalyptus grandis x E. urophylla Plantation

Moreira,

Hakamada,

Silva

et al. 2023

Forests

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The objective of this work was to evaluate the losses in the process, survival, uniformity and growth during an entire short rotation of a clonal planting of Eucalyptus grandis x Eucalyptus urophylla in Brazil as a function of the different morphological characteristics of the seedlings considered a proxy of seedling quality. Seedlings were classified in descending order of quality by the following treatments: A > B > C. Treatment D was composed of prime seedlings 180 days old in the nursery. Treatment A and B experienced a mortality rate of 3% 30 days after planting, while seedlings C and D showed a mortality rate of 8%. Throughout the entire planting process, treatment C had the highest total losses of 24%, which was 15% higher than the average of the other three treatments. The quality of seedlings, as determined by the IQD, positively correlated with stem diameter, leaf biomass, and PH50 at 60 days of age. However, these relationships lost significance at later ages, and the DQI could not explain the variation in volume and stand uniformity (PV50) along the rotation. Despite early differences, from 36 to 64 months, only old seedlings (Treat. D) showed a difference in wood volume to the other treatments.

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Section: Discussionmentioning

confidence: 99%

Section: Experimental Designmentioning

confidence: 99%