Problems in the uptake of potash by the oil palm (E. [Elaeis] guineensis) in Papua New Guinea

Guiking F.C.T., . (1985) Problems in the uptake of potash by the oil palm (E. [Elaeis] guineensis) in Papua New Guinea. In: International Conference on Soils and Nutrition of Perennial Crops, 13-15 Aug 1985, Kuala Lumpur (Malaysia).

The soils in Papua New Guinea are of volcanic origin with a relatively high pH (>6) and a very high proportion (60-80%) of the Cation Exchange Capacity (CEC) occupied by Ca. From experimental data it became apparent that with these soils applied with muriate of potash decreased the leaf K levels and increased the Cl levels in oil palm. To investigate the effect of potassium on growth and production an experiment was done using different sources of potash: muriate of potash (MoP) sulphate of potash (SoP) and bunch ash (BA) at two different K/Mg ratios. To obtain equivalent levels sulphur was added as necessary. Treatments started when the palms were 4 yrs old followed by 6 yrs. Yield of fertilized plots did not differ from unfertilized ones. Leaf K levels (just over 0.8%) were not raised by the use of SOP and BA; but MoP decreased the leaf K by more than 5% and raised leaf Cl levels from 0.3-0.4 to > 0.5% Cl. Oil to pulp was determined in some selected plots but there was no increase due to the treatments

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Abstract

The soils in Papua New Guinea are of volcanic origin with a relatively high pH (>6) and a very high proportion (60-80%) of the Cation Exchange Capacity (CEC) occupied by Ca. From experimental data it became apparent that with these soils applied with muriate of potash decreased the leaf K levels and increased the Cl levels in oil palm. To investigate the effect of potassium on growth and production an experiment was done using different sources of potash: muriate of potash (MoP) sulphate of potash (SoP) and bunch ash (BA) at two different K/Mg ratios. To obtain equivalent levels sulphur was added as necessary. Treatments started when the palms were 4 yrs old followed by 6 yrs. Yield of fertilized plots did not differ from unfertilized ones. Leaf K levels (just over 0.8%) were not raised by the use of SOP and BA; but MoP decreased the leaf K by more than 5% and raised leaf Cl levels from 0.3-0.4 to > 0.5% Cl. Oil to pulp was determined in some selected plots but there was no increase due to the treatments

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Item Type:	Conference or Workshop Item (Paper)
Additional Information:	Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor. S597 P4I61 1984 Call Number
AGROVOC Term:	Elaeis guineensis
AGROVOC Term:	Oil palm
AGROVOC Term:	Fertilization
AGROVOC Term:	Potash fertilizers
AGROVOC Term:	Nutrient uptake
AGROVOC Term:	Soil chemistry
AGROVOC Term:	Papua New Guinea
Geographical Term:	MALAYSIA
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:52
URI:	http://webagris.upm.edu.my/id/eprint/7682

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