Quencez Pierre. 2002. Agronomy missions to PRESCO oil palm estates (Nigeria), 10 - 15 September 2001, 21 - 26 May 2002. Montpellier : CIRAD-CP, 77 p. N° de rapport : CP_SIC 1535
Résumé : This report takes stock of nutrition trends over the past years, up to the current situation (latest analyses/samples at the end of 2001). This study is based on leaf analysis results (K on the one hand, N and P on the other hand) per plot sample and data taken from the fertilization reports sent to us (CD ROM: plot file per application date). The nutrition situation can be summed up as follows: At Obaretin: nutrition is satisfactory for N and P; K nutrition has improved overall, especially for plots that have received EFB, though reactions are irregular, given the time lapse between application and leaf analysis. In immature plantings, we ran emphasize the merits of applying MOP to improve Cl nutrition; the use of by products has proved to be effective apart from this one exception. At Cowan: interpretation of the leaf analysis results is not as easy, due to changes in the sampling sites; care should be taken to keep the same ones. However, the situation is satisfactory for N and P, and the K contents are even rather high, which is surprising in view of reduced MOP rates in 2000 and 2001. The fertilization recommendations: are given, as in the past, per planting year (with a few exceptions for some plots) based on the MOP rate. Use of by products (such as EFB, PKC...) in zones reserved for organic production is distinct; for lack of local experimental results, an average EFB rate (17.5 t/ha) equivalent to 1.6 kg MOP/palm will be applied. A new schedule for the immature fields is described: it includes PKC, urea, compound and MOP. Particular instructions are proposed for ensuring that the various fertilizing products are put to optimum use; based on various results of analyses carried out on fresh products, equivalences in quantities with mineral fertilizers are given; they can be used as a reminder for making any necessary changes in the usable products. Nutrition trial PR CP 01: A protocol modification is given; it should be applied right away. Observation of fertilizer application errors led us to emphasize the need for closer supervision of all work, and especially fertilizer applications. All the leaf analysis and production data have been analysed and statistically processed; the trial is too young to draw any conclusions. It will be necessary to prepare the thinning operation which we propose carrying out rapidly at the end of this season. It will be necessary to be very strict. A palm by palm map (the centres of hexagons are systematically removed) and a list will have to be drawn up. We gave a general talk on the subject to those in charge of nutrition and fertilization operations; a recent basic publication can be found in the annex; it would be a good idea to distribute it. Thinning The principles and methods are given for successful completion of this operation in all the plantings originally set up at 180 palms/ha; this operation needs to be carried out at 7 years. Trials are proposed to test different products to poison the surplus palms.
Mots-clés Agrovoc : Elaeis guineensis
Mots-clés géographiques Agrovoc : Nigéria
Classification Agris : F01 - Culture des plantes
F04 - Fertilisation
Auteurs et affiliations
- Quencez Pierre, CIRAD-CP-PALMIER (FRA)
Autres liens de la publication
Source : Cirad - Agritrop (https://agritrop.cirad.fr/513040/)
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