Rotan manau intercropped with rubber: rate of root growth between three and four years after planting

Wan Rashidah Kadir, . and Aminuddin Mohamad, . and Ahmad Sahali Mardi, . and Zaharah Abd Rahman, . Rotan manau intercropped with rubber: rate of root growth between three and four years after planting. pp. 86-93. ISSN 0128-1283

Wan Rashidah K. Aminuddin M. Ahmad Sahali M. Zaharah A.R. 1997. Rotan manau intercropped with rubber: rate of root growth between three and four years after planting. Efficient fertiliser management depends partly on understanding the active root distribution. In the present study the active root distribution of 3- and 4-y-old plantation grown rotan manau (Calamus manan) was assessed using isotope tracer technique. For the 3-y-old rotan manau three distances from the plant base (0.5 1.0 and 1.5 m) at 5 and 30 cm depths were examined. For the 4-y-old plants two distances viz-a-viz at a centre between two rattan plants and another in the middle between two rattan plants and two rubber trees were studied. The isotope used was 32P applied as a solution with KH2PO4. The rotan manau plants had been established under mature rubber plantation. High proportions of feeder roots were found at 0.5 and 1.0 m distances at the surface (5 cm depth) for the 3-y-old plants. Uptake of 32P was also observed for the application at 1.5 m distance for both depths but the counts were small. Statistical analysis gave a highly significant difference within the distances and within the different depths. For a better synchronisation between fertiliser application and plant uptake it seems that application at approximately between 0.5 and 1.0 m distance around the plant is most appropriate at this age. At four years after planting important uptake was obtained only for the two plants located near the application area. Anyhow to some extent it reflected that roots had already extended for another 1 m compared to the 3-y-old plants.

Full text available from:

Abstract

Wan Rashidah K. Aminuddin M. Ahmad Sahali M. Zaharah A.R. 1997. Rotan manau intercropped with rubber: rate of root growth between three and four years after planting. Efficient fertiliser management depends partly on understanding the active root distribution. In the present study the active root distribution of 3- and 4-y-old plantation grown rotan manau (Calamus manan) was assessed using isotope tracer technique. For the 3-y-old rotan manau three distances from the plant base (0.5 1.0 and 1.5 m) at 5 and 30 cm depths were examined. For the 4-y-old plants two distances viz-a-viz at a centre between two rattan plants and another in the middle between two rattan plants and two rubber trees were studied. The isotope used was 32P applied as a solution with KH2PO4. The rotan manau plants had been established under mature rubber plantation. High proportions of feeder roots were found at 0.5 and 1.0 m distances at the surface (5 cm depth) for the 3-y-old plants. Uptake of 32P was also observed for the application at 1.5 m distance for both depths but the counts were small. Statistical analysis gave a highly significant difference within the distances and within the different depths. For a better synchronisation between fertiliser application and plant uptake it seems that application at approximately between 0.5 and 1.0 m distance around the plant is most appropriate at this age. At four years after planting important uptake was obtained only for the two plants located near the application area. Anyhow to some extent it reflected that roots had already extended for another 1 m compared to the 3-y-old plants.

[error in script]

Item Type:	Article
Additional Information:	Summaries (En Ms)
AGROVOC Term:	CANES AND RATTANS
AGROVOC Term:	CALAMUS (PALMAE)
AGROVOC Term:	HEVEA BRASILIENSIS
AGROVOC Term:	INTERCROPPING
AGROVOC Term:	PLANTING
AGROVOC Term:	GROWTH RATE
AGROVOC Term:	ROOTS
AGROVOC Term:	FERTILIZER APPLICATION
AGROVOC Term:	NUTRIENT INTAKE
AGROVOC Term:	RADIOISOTOPES
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:52
URI:	http://webagris.upm.edu.my/id/eprint/17742

Actions (login required)

View Item