Interspecific and Intraspecific Rootstock Suitability for Vegetative Propagation of Petai (Parkia speciosa, Hassak.)
Bibliographic record
Abstract
The intraspecific and interspecific suitability of five species as rootstocks for the vegetative propagation of petai (Parkia speciosa, Hassak.) was tested in a two-step study testing budwood and top grafting methods. Stage 1 used rootstock of lamtoro (Leucaena leucocephala), flamboyant (Delonix regia) and petai (as a control). The results showed that the petai-lamtoro and petai-flamboyant graft combinations all died within two weeks of grafting. The petai-petai combination demonstrated 25% survival one month after grafting. Stage 2 again tested lamtoro and petai (as a control), as well as sengon (Paraserianthes falcataria) and kedawung (Parkia timoriana) as rootstocks. Similar to Stage 1 results, the petai-lamtoro and petai-sengon combinations suffered 100% mortality two weeks after grafting. The petai-kedawung and petai-petai combinations demonstrated 40% and 50% survival, respectively, one month after grafting. Based on results it is concluded that kedawung and petai are suitable rootstocks for petai scion with the budwood and top grafting methods, but lamtoro, sengon and flamboyant are incompatible. Examination during the study indicated that grafts of the dead specimen were discoloured and dried. Furthermore, all the species in the study have thin cambiums that are sensitive to high temperature, low humidity and desiccation. Recommendations are provided to reduce the vulnerability of petai grafts to desiccation during scion harvesting, pre-grafting nursery management, grafting operations and post-grafting management. An alternative for multiplying small numbers of high-yielding petai individuals and varieties is suggested.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".