Results of NPKMg fertilizer trial conducted on coconut in Indonesia

Davis T.A., . and Louis I.H., . Results of NPKMg fertilizer trial conducted on coconut in Indonesia. pp. 620-629. ISSN 0126-575X

A large-scale NPKMg fertilizer trial was in progress in Indonesia from 1977/1978 at two locations one at Pangandaran West Java and the other at Manado North Sulawesi. Data recorded on the palms at Pangandaran (coastal area) after the fifth and final-year application of fertilizers completed in 1983 gave the following results: Palms receiving fertilizer K recorded a two-fold benefit as it increased both the number of fruits and the quantity of copra when applied singly or in combination with some of the other elements. Thus compared to the performance of control palms these palms showed a statistically significant improvement in yield. P had either no beneficial effect or gave a negative response at Pangandaran where the soil already had a fairly high level of P. On the other hand for Manado a volcanic region rich in Mg fertilizer Mg had only a marginally favourable effect. In some instances Mg depressed fruit yield. On the other hand K increased the yield significantly. N was beneficial when applied alone or in combination with some elements but the magnitude was not high. P had only a marginally beneficial effect. The repeated volcanic eruptions of Mt. Galunggung in West Java disrupted the Pangandaran trial at the end of 1983 because of the deposition of a 2 cm thick layer of warm volcanic mud sand and ash. Hence recording of observations was stopped from 1984. On the basis of results already obtained from this trial supported by information gathered through leaf tissue analysis a project for fertilization of palms in the main coconut regions of Indonesia was initiated.

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Abstract

A large-scale NPKMg fertilizer trial was in progress in Indonesia from 1977/1978 at two locations one at Pangandaran West Java and the other at Manado North Sulawesi. Data recorded on the palms at Pangandaran (coastal area) after the fifth and final-year application of fertilizers completed in 1983 gave the following results: Palms receiving fertilizer K recorded a two-fold benefit as it increased both the number of fruits and the quantity of copra when applied singly or in combination with some of the other elements. Thus compared to the performance of control palms these palms showed a statistically significant improvement in yield. P had either no beneficial effect or gave a negative response at Pangandaran where the soil already had a fairly high level of P. On the other hand for Manado a volcanic region rich in Mg fertilizer Mg had only a marginally favourable effect. In some instances Mg depressed fruit yield. On the other hand K increased the yield significantly. N was beneficial when applied alone or in combination with some elements but the magnitude was not high. P had only a marginally beneficial effect. The repeated volcanic eruptions of Mt. Galunggung in West Java disrupted the Pangandaran trial at the end of 1983 because of the deposition of a 2 cm thick layer of warm volcanic mud sand and ash. Hence recording of observations was stopped from 1984. On the basis of results already obtained from this trial supported by information gathered through leaf tissue analysis a project for fertilization of palms in the main coconut regions of Indonesia was initiated.

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Item Type:	Article
Additional Information:	2 plates; 3 tables; 20 ref. Summary (En)
AGROVOC Term:	COCOS NUCIFERA
AGROVOC Term:	ABONOS NPK
AGROVOC Term:	ABONOS MAGNESICOS
AGROVOC Term:	INDONESIA/ FRUTALES
AGROVOC Term:	COPRA
AGROVOC Term:	RENDIMIENTO
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:55
URI:	http://webagris.upm.edu.my/id/eprint/20102

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