Yield responses to phosphate fertilizer in oil palm

Zin Z. Zakaria, . and Foster H.L., . and Tarmizi Mohammed A., . and Mohd Tayeb Dolmat, . (1992) Yield responses to phosphate fertilizer in oil palm. [Proceedings Paper]

The yield response to rock phosphate fertilizers was studied in oil palm. Data from 10 field trials conducted on different soil types in Peninsular Malaysia at two different time periods were analysed. Results indicate that for inland soils yield response to oil palm replants to application of CIRP is generally profitable up to at least 3-4kg per palm per year. However for the coastal soils the rate is up to 2-3kg P fertilizer per palm per year. It was also noted that there was no indication of any reduction in P requirements with time on these soils. For both soil types full P response depends on adequate N fertilization. Conversely no response to N fertilizer is obtained if P is inadequate. It was also observed that on inland soils the optimum leaf P level was approximately 0.165 percent regardless of age. If P level is found to be lower an increase in P fertilizer rate is recommended. A very strong response to P fertilizer can be expected if soil extractable P in the weeded circle is below 15 ppm. However on coastal soils neither leaf nor soil P level has been found to be of any use in indicating P fertilizer requirement

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Abstract

The yield response to rock phosphate fertilizers was studied in oil palm. Data from 10 field trials conducted on different soil types in Peninsular Malaysia at two different time periods were analysed. Results indicate that for inland soils yield response to oil palm replants to application of CIRP is generally profitable up to at least 3-4kg per palm per year. However for the coastal soils the rate is up to 2-3kg P fertilizer per palm per year. It was also noted that there was no indication of any reduction in P requirements with time on these soils. For both soil types full P response depends on adequate N fertilization. Conversely no response to N fertilizer is obtained if P is inadequate. It was also observed that on inland soils the optimum leaf P level was approximately 0.165 percent regardless of age. If P level is found to be lower an increase in P fertilizer rate is recommended. A very strong response to P fertilizer can be expected if soil extractable P in the weeded circle is below 15 ppm. However on coastal soils neither leaf nor soil P level has been found to be of any use in indicating P fertilizer requirement

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Item Type:	Proceedings Paper
Additional Information:	6 tables 3 ref.; Summary En
AGROVOC Term:	ELAEIS GUINEENSIS
AGROVOC Term:	ABONOS FOSFATADOS
AGROVOC Term:	RENDIMIENTO DE CULTIVOS
AGROVOC Term:	MALASIA
AGROVOC Term:	NITROGENO/ TIPOS DE SUELO
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:26
URI:	http://webagris.upm.edu.my/id/eprint/15049

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