Effects of Paclobutrazol and its method of application on the growth and transpiration of Acacia Mangium Seedlings
Ten-week-old potted A. mangium seedlings were subjected to a growth retardant, paclobutrazol (PP333), at concentrations of 0, 0.5, 1, 4 and 12 gil. Four methods of application were tested namely S, soil drenching at week 0; F1, foliar spray (potting soil protected from chemical) at week 0; F2, fol...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Universiti Putra Malaysia Press
1993
|
| Online Access: | http://psasir.upm.edu.my/id/eprint/3105/ http://psasir.upm.edu.my/id/eprint/3105/1/Effects_of_Paclobutrazol_and_its_Method_of_Application_on_the_Growth_and.pdf |
| _version_ | 1848839437088194560 |
|---|---|
| author | S. A., Abod L. T., Jeng |
| author_facet | S. A., Abod L. T., Jeng |
| author_sort | S. A., Abod |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Ten-week-old potted A. mangium seedlings were subjected to a growth retardant, paclobutrazol (PP333), at
concentrations of 0, 0.5, 1, 4 and 12 gil. Four methods of application were tested namely S, soil drenching at
week 0; F1, foliar spray (potting soil protected from chemical) at week 0; F2, foliar spray (potting soil protected
from chemical) at week 0 and 6; and S+F, soil and foliar spray (potting soil exposed to chemical spray) at week
O. Plants were harvested after 12 weeks for various growth measurements. Height and leaf area increments,
transpiration and stomatal conductance were monitored at weekly intervals. Paclobutrazol was found to be
effective in reducing root and shoot growth, transpiration and stomatal conductance of the seedlings. Treated
plants had higher root to shoot ratios. The effects of the chemical increased with increasing concentration and
frequency of application for the foliar spray. The chemical was most effective when applied through the soil either
l7y drenching (S) or soil and foliar spray (S+F). |
| first_indexed | 2025-11-15T07:11:26Z |
| format | Article |
| id | upm-3105 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T07:11:26Z |
| publishDate | 1993 |
| publisher | Universiti Putra Malaysia Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-31052015-09-01T03:25:40Z http://psasir.upm.edu.my/id/eprint/3105/ Effects of Paclobutrazol and its method of application on the growth and transpiration of Acacia Mangium Seedlings S. A., Abod L. T., Jeng Ten-week-old potted A. mangium seedlings were subjected to a growth retardant, paclobutrazol (PP333), at concentrations of 0, 0.5, 1, 4 and 12 gil. Four methods of application were tested namely S, soil drenching at week 0; F1, foliar spray (potting soil protected from chemical) at week 0; F2, foliar spray (potting soil protected from chemical) at week 0 and 6; and S+F, soil and foliar spray (potting soil exposed to chemical spray) at week O. Plants were harvested after 12 weeks for various growth measurements. Height and leaf area increments, transpiration and stomatal conductance were monitored at weekly intervals. Paclobutrazol was found to be effective in reducing root and shoot growth, transpiration and stomatal conductance of the seedlings. Treated plants had higher root to shoot ratios. The effects of the chemical increased with increasing concentration and frequency of application for the foliar spray. The chemical was most effective when applied through the soil either l7y drenching (S) or soil and foliar spray (S+F). Universiti Putra Malaysia Press 1993 Article NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/3105/1/Effects_of_Paclobutrazol_and_its_Method_of_Application_on_the_Growth_and.pdf S. A., Abod and L. T., Jeng (1993) Effects of Paclobutrazol and its method of application on the growth and transpiration of Acacia Mangium Seedlings. Pertanika Journal of Tropical Agricultural Science, 16 (2). pp. 143-150. ISSN 0126-6128 http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JTAS%20Vol.%2016%20(2)%20Aug.%201993/11%20JTAS%20Vol.16%20(2)%201993%20(Pg%20143-150).pdf |
| spellingShingle | S. A., Abod L. T., Jeng Effects of Paclobutrazol and its method of application on the growth and transpiration of Acacia Mangium Seedlings |
| title | Effects of Paclobutrazol and its method of application on the growth and transpiration of Acacia Mangium Seedlings |
| title_full | Effects of Paclobutrazol and its method of application on the growth and transpiration of Acacia Mangium Seedlings |
| title_fullStr | Effects of Paclobutrazol and its method of application on the growth and transpiration of Acacia Mangium Seedlings |
| title_full_unstemmed | Effects of Paclobutrazol and its method of application on the growth and transpiration of Acacia Mangium Seedlings |
| title_short | Effects of Paclobutrazol and its method of application on the growth and transpiration of Acacia Mangium Seedlings |
| title_sort | effects of paclobutrazol and its method of application on the growth and transpiration of acacia mangium seedlings |
| url | http://psasir.upm.edu.my/id/eprint/3105/ http://psasir.upm.edu.my/id/eprint/3105/ http://psasir.upm.edu.my/id/eprint/3105/1/Effects_of_Paclobutrazol_and_its_Method_of_Application_on_the_Growth_and.pdf |