RELACION ENTRE LA CONCENTRACION DE AL Y MN, CRECIMIENTO, PRODUCCION DE MATERIA SECA, Y CONTENIDO FOLIAR DE NUTRIMENTOS EN PLANTULAS DE CACAO (Theobroma cacao L.)

R. Lemus and K.D. Ritchey

No 259349, 26th Annual Meeting, July 29 to August 4, 1990, Mayaguez, Puerto Rico from Caribbean Food Crops Society

Abstract: Two greenhouse experiments were carried out to evaluate the effect of lime on soil pH, Mn level and Al saturation and growth, dry matter production and foliar nutrient content in 6-month old cacao (Theobroma cacao L.) plants. A factorial randomized complete block design (4 genotypes x 5 treatments) was replicated 5 times. Two Ultisols from the humid zone of Puerto Rico were used. A Dystropeptic Tropudult (Maricao) with a pH of 4.8, high in Al, received four levels of lime (0, 4, 8 and 12 meq/lOOg of Ca as Ca(OH)2), and one treatment of 4 meq/lOOg Al as A12(S04)3. A Plinthic Palehumult (Torres) with a pH of 4.9 high in Mn, received four lime levels (0, 3, 6, and 9 meq/100 Ca) plus a treatment of 170 mg/kg Mn as MnSO*. Liming reduced extractable Al, Mn, P and Mg in both soils. Growth of 6-month old seedlings increased as Al and Mn decreased. Foliar P, Ca and Mg increased with liming and Al, Mn and Zn decreased. The leaves of the Al-toxic plants were small and chlorotic. In treatments where toxicity of Mn was observed, leaves had 4000 to 6000 mg/kg Mn. Young leaf interveinal areas were chlorotic and older leaves, stems and apical meristems had necrotic spots.

Keywords: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies (search for similar items in EconPapers)
Pages: 17
Date: 1990-07-29
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://ageconsearch.umn.edu/record/259349/files/26_29.pdf (application/pdf)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:ags:cfcs90:259349

DOI: 10.22004/ag.econ.259349

Access Statistics for this paper

More papers in 26th Annual Meeting, July 29 to August 4, 1990, Mayaguez, Puerto Rico from Caribbean Food Crops Society
Bibliographic data for series maintained by AgEcon Search ().