Report on the mission to the GOPDC estates (Ghana), 8 to 14 december 2007

Bonneau Xavier. 2007. Report on the mission to the GOPDC estates (Ghana), 8 to 14 december 2007. Montpellier : CIRAD, 150 p. N° de rapport : CIRAD-PERSYST N°2175

Résumé : After modification of the protocol as planned in 2007, experiment GH ES 02 (testing of fertilizers compatible with organic oil status) is confirming the good performance of Flanamat as a potassium fertilizer, and is also showing the start of a tendency for Sulpomag natural mineral fertilizer to perform well, also as a potassium fertilizer. The experiment also confirms that split fertilizer applications have no effect, and particularly shows a very strong soil effect: all other things being equal, palms planted in valley bottoms on Temang type soil have much better yields than those on lower slopes on Kokofu type soil. Experiment GH ES 03 (comparison of 4 potassium fertilizers) confirms the results from last year, with very good growth and a good start to bearing for the young oil palms, and, for the time being, an absence of any effect between the 4 fertilizers being compared. It should be noted that the supplemental NaCl applied in treatment Si- provided chlorine that has been taken up by the young palms. Sodium chloride in moderate amounts therefore proves to be an excellent source of chlorine, without the drawback of excess of sodium. Experiment GH ES 04 (testing of increasing Flanamat rates on young palms) was set up in May 2007, in compliance with the protocol. The first results are expected in 2008. Experiment GH CP 03 (testing of two cultural techniques: subsoiling and gypsum application) was set up in May 2007, in compliance with the protocol. The first results are expected in 2008. In the Kwae Nucleus, 501 ha have been planted in 2007. The priority is to eradicate the Oryctes outbreak, probably occurring because the soil was not cleared enough at the time of planting. At Okumaning, 91 ha have been planted in 2007. Panicum eradication is almost complete, and young palm upkeep has progressed well. In the Outgrowers, Sulpomag was applied in 2007, between 1 and 3 kg per palm, and a halt to the drop in K leaf contents has been seen (though it is not possible to show a correlation). For fertilization in 2008, a generalized application of Flanamat is recommended, at the standard rates (rather than Sulpomag which is still at the experimental stage in the trials) and supplemental NaCl is also recommended on palms with a low Cl content (usually in an upland situation) to strengthen their ability to resist water stress.

Mots-clés Agrovoc : Elaeis guineensis, plantations, expérimentation, fertilisation, Oryctes

Mots-clés géographiques Agrovoc : Ghana

Classification Agris : F04 - Fertilisation
F08 - Systèmes et modes de culture

Auteurs et affiliations

• Bonneau Xavier, CIRAD-PERSYST-UPR Systèmes de pérennes (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/544006/)

Métriques

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