Citation
Chew P.S., . and Goh K.J., . and Kee K.K., . (1996) Spatial soil fertility in mature oil palm agroecosystem and its implications on fertiliser management. [Proceedings Paper]
Abstract
Understanding spatial soil variability and fertlity will allow site-specitic management of our land minimise soil loss and prevent soil degradation. The conventional fertiliser mangement of oil palms is known to create spatial soil fertility in the system but it has not been quantified in Malaysia. Therefore two experiments were conducted to study the scale of spatial dependence in soil fertility and the impacts of continuous applications fo fertilisers in the palm circles. Results showed that the maximum variances of the soil properties were reached at about 2 cm. Within this scale distance soil pH and exchangeable cations showed strong spatial correlation. 57 to 86 of the variances were found in the microsite component of variance. There were negative variances between the palms for soil pH exchangeable cations and base saturation which were attributed to intra-class correlations. Soil fertility status was highest in the palm circle and frond heap. K uptake was most rapid in the palm circle. However long-term applications of fertilisers in the palm circle resulted in pronounced soil acidification greater risk of leaching loss of K and higher N and K runoff losses. To maintain nutrient uptake efficiency and minimise detrimental effects it is proposed to apply fertilisers in the palm circles of immature palms and gradually extend to the interrows only when the palms are at least 10 years old and their canopies are fully closed. However fertiliser applications in the harvesters path and high rainfall months should be avoided.
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Abstract
Understanding spatial soil variability and fertlity will allow site-specitic management of our land minimise soil loss and prevent soil degradation. The conventional fertiliser mangement of oil palms is known to create spatial soil fertility in the system but it has not been quantified in Malaysia. Therefore two experiments were conducted to study the scale of spatial dependence in soil fertility and the impacts of continuous applications fo fertilisers in the palm circles. Results showed that the maximum variances of the soil properties were reached at about 2 cm. Within this scale distance soil pH and exchangeable cations showed strong spatial correlation. 57 to 86 of the variances were found in the microsite component of variance. There were negative variances between the palms for soil pH exchangeable cations and base saturation which were attributed to intra-class correlations. Soil fertility status was highest in the palm circle and frond heap. K uptake was most rapid in the palm circle. However long-term applications of fertilisers in the palm circle resulted in pronounced soil acidification greater risk of leaching loss of K and higher N and K runoff losses. To maintain nutrient uptake efficiency and minimise detrimental effects it is proposed to apply fertilisers in the palm circles of immature palms and gradually extend to the interrows only when the palms are at least 10 years old and their canopies are fully closed. However fertiliser applications in the harvesters path and high rainfall months should be avoided.
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| Additional Information: | Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. mal S590.2 S683 1995 Call Number |
| AGROVOC Term: | ELAEIS GUINEENSIS |
| AGROVOC Term: | OIL PALMS |
| AGROVOC Term: | FERTILIZER APPLICATION |
| AGROVOC Term: | SOIL FERTILITY |
| AGROVOC Term: | NUTRIENT UPTAKE |
| AGROVOC Term: | POTASSIUM |
| AGROVOC Term: | FERTILIZERS |
| AGROVOC Term: | SOIL CHEMICOPHYSICAL PROPERTIES |
| AGROVOC Term: | GROWTH |
| AGROVOC Term: | YIELDS |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Norfaezah Khomsan |
| Last Modified: | 24 Apr 2025 05:27 |
| URI: | http://webagris.upm.edu.my/id/eprint/16300 |
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