Nutrient absorption by oil palm primary roots as affected by empty fruit bunch application

Various parts of the oil palm primary roots were tested to determine the part which absorbs nutrients. An understanding of this aspect of nutrient absorption by the oil palm will explain why the application of empty fruit bunches (EFB) is important. Applying EFB increases the amount of roots, thus i...

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Main Authors: Liew, Voon Kheong, Abdul Rahman, Zaharah, Musa, Mohamed Hanafi, Hussin, Aminuddin
Format: Article
Language:English
English
Published: Malaysian Palm Oil Board (MPOB) 2010
Online Access:http://psasir.upm.edu.my/id/eprint/15868/1/Nutrient%20absorption%20by%20oil%20palm%20primary%20roots%20as%20affected%20by%20empty%20fruit%20bunch%20application.pdf
http://psasir.upm.edu.my/id/eprint/15868/
http://palmoilis.mpob.gov.my/publications/joprv22april10-Liew.pdf
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spelling my.upm.eprints.158682015-10-05T04:05:03Z http://psasir.upm.edu.my/id/eprint/15868/ Nutrient absorption by oil palm primary roots as affected by empty fruit bunch application Liew, Voon Kheong Abdul Rahman, Zaharah Musa, Mohamed Hanafi Hussin, Aminuddin Various parts of the oil palm primary roots were tested to determine the part which absorbs nutrients. An understanding of this aspect of nutrient absorption by the oil palm will explain why the application of empty fruit bunches (EFB) is important. Applying EFB increases the amount of roots, thus increasing the palm’s ability to absorb nutrients and hence, potentially making fertilizer applications more effective. To determine which part of the roots collects and absorbs nutrients, various locations on the primary roots, starting from the root tip, were treated with a solution of KH2PO4 containing 5 μg P ml-1 and 4 μCi of carrier-free 32P. The various locations were identified based on their colour, i.e. creamy white for the root tip, beige for that part of the root just after the creamy white portion, and dark brown for the oldest part of the root. After 24 hr of exposure, the amount of radioactivity emitted from each location was determined. Another experiment was conducted to determine the nutrient distribution pattern in the root after the nutrient was absorbed. In this experiment, the root tip and the part of the root that was dark brown in colour were treated with potassium chloride solution laced with 86Rb for 24 hr. After that time period, about 1 cm of each treated root, starting from the root tip and moving towards the palm base was cut, and their radioactivity determined. Results show that the part of the root that was creamy white (root tip) was significantly more active (P<0.05) in absorbing the nutrient compared to the other parts of the root. The amount of nutrient absorbed at that part of the root increased over time and was significantly higher (p<0.05) at 72 hr compared to absorption at 24 hr. The nutrient distribution pattern in the root from the point of exposure towards the palm base was different when the nutrient was absorbed from the root tip compared to the older part of the root which was dark brown in colour. When the nutrient was absorbed at the root tip, the distribution pattern of the nutrient along the length of the root from the tip to the base of the palm showed a certain pattern. Nutrient concentration was highest at the tip of the root and gradually decreased along the root towards the palm base. However, the nutrient distribution in the treatment of the dark brown part of the root did not follow the same pattern. It is suggested that the nutrient collected within the spaces in the older brown part of the root and flowed towards the root tip before being absorbed. Application of EFB increased the mass of roots. The results imply that for fertilizer application to be more effective, the fertilizers should be applied to those places where most of the roots are formed, i.e. especially under the heaps of EFB. Malaysian Palm Oil Board (MPOB) 2010 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/15868/1/Nutrient%20absorption%20by%20oil%20palm%20primary%20roots%20as%20affected%20by%20empty%20fruit%20bunch%20application.pdf Liew, Voon Kheong and Abdul Rahman, Zaharah and Musa, Mohamed Hanafi and Hussin, Aminuddin (2010) Nutrient absorption by oil palm primary roots as affected by empty fruit bunch application. Journal of Oil Palm Research, 22 (April). pp. 711-720. ISSN 1511-2780 http://palmoilis.mpob.gov.my/publications/joprv22april10-Liew.pdf English
institution Universiti Putra Malaysia
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continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description Various parts of the oil palm primary roots were tested to determine the part which absorbs nutrients. An understanding of this aspect of nutrient absorption by the oil palm will explain why the application of empty fruit bunches (EFB) is important. Applying EFB increases the amount of roots, thus increasing the palm’s ability to absorb nutrients and hence, potentially making fertilizer applications more effective. To determine which part of the roots collects and absorbs nutrients, various locations on the primary roots, starting from the root tip, were treated with a solution of KH2PO4 containing 5 μg P ml-1 and 4 μCi of carrier-free 32P. The various locations were identified based on their colour, i.e. creamy white for the root tip, beige for that part of the root just after the creamy white portion, and dark brown for the oldest part of the root. After 24 hr of exposure, the amount of radioactivity emitted from each location was determined. Another experiment was conducted to determine the nutrient distribution pattern in the root after the nutrient was absorbed. In this experiment, the root tip and the part of the root that was dark brown in colour were treated with potassium chloride solution laced with 86Rb for 24 hr. After that time period, about 1 cm of each treated root, starting from the root tip and moving towards the palm base was cut, and their radioactivity determined. Results show that the part of the root that was creamy white (root tip) was significantly more active (P<0.05) in absorbing the nutrient compared to the other parts of the root. The amount of nutrient absorbed at that part of the root increased over time and was significantly higher (p<0.05) at 72 hr compared to absorption at 24 hr. The nutrient distribution pattern in the root from the point of exposure towards the palm base was different when the nutrient was absorbed from the root tip compared to the older part of the root which was dark brown in colour. When the nutrient was absorbed at the root tip, the distribution pattern of the nutrient along the length of the root from the tip to the base of the palm showed a certain pattern. Nutrient concentration was highest at the tip of the root and gradually decreased along the root towards the palm base. However, the nutrient distribution in the treatment of the dark brown part of the root did not follow the same pattern. It is suggested that the nutrient collected within the spaces in the older brown part of the root and flowed towards the root tip before being absorbed. Application of EFB increased the mass of roots. The results imply that for fertilizer application to be more effective, the fertilizers should be applied to those places where most of the roots are formed, i.e. especially under the heaps of EFB.
format Article
author Liew, Voon Kheong
Abdul Rahman, Zaharah
Musa, Mohamed Hanafi
Hussin, Aminuddin
spellingShingle Liew, Voon Kheong
Abdul Rahman, Zaharah
Musa, Mohamed Hanafi
Hussin, Aminuddin
Nutrient absorption by oil palm primary roots as affected by empty fruit bunch application
author_facet Liew, Voon Kheong
Abdul Rahman, Zaharah
Musa, Mohamed Hanafi
Hussin, Aminuddin
author_sort Liew, Voon Kheong
title Nutrient absorption by oil palm primary roots as affected by empty fruit bunch application
title_short Nutrient absorption by oil palm primary roots as affected by empty fruit bunch application
title_full Nutrient absorption by oil palm primary roots as affected by empty fruit bunch application
title_fullStr Nutrient absorption by oil palm primary roots as affected by empty fruit bunch application
title_full_unstemmed Nutrient absorption by oil palm primary roots as affected by empty fruit bunch application
title_sort nutrient absorption by oil palm primary roots as affected by empty fruit bunch application
publisher Malaysian Palm Oil Board (MPOB)
publishDate 2010
url http://psasir.upm.edu.my/id/eprint/15868/1/Nutrient%20absorption%20by%20oil%20palm%20primary%20roots%20as%20affected%20by%20empty%20fruit%20bunch%20application.pdf
http://psasir.upm.edu.my/id/eprint/15868/
http://palmoilis.mpob.gov.my/publications/joprv22april10-Liew.pdf
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