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Nahrstoff-versorgung von Kaffee-Pflanzungen (Coffea canephora var. Robusta)

by Schnug, E; Zahn, S; Pissarek, H.P.
Publisher: Oct 1985Subject(s): COFFEA CANEPHORA | PLANTACIONES | NUTRIENTES | DEFICIENCIA DE MINERALES | AFRICA CENTRAL | ANALISIS DE TEJIDOS | ANALISIS DEL SUELO | COFFEA CANEPHORA | PLANTATIONS | NUTRIENTS | MINERAL DEFICIENCIES | CENTRAL AFRICA | TISSUE ANALYSIS | SOIL ANALYSIS | COFFEA CANEPHORA | PLANTATIONS | SUBSTANCE NUTRITIVE | CARENCE MINERALE | AFRIQUE CENTRALE | ANALYSE DE TISSUS | ANALYSE DE SOL In: Tropenlandwirt (Alemania, R.F.) v. 86 p. 129-139Summary: Foliar and soil analysis in 51 coffee plantations of the M'Bomou region (Central African Republic) indicated the following: (1) all the plants were deficient in Zn, while 40-50 of the plants were below the critical levels of N, P, Ca and Fe, and 20-30 below those of K and Mg. No deficiencies could be detected as regards S, Mn, Cu and B; (2) the leaves had an abnormal Zn:Cu ratio (1:2.6, against 5:1 normally); (3) results of soil and plant analysis were not significantly correlated; (4) the type of undergrowth (non-leguminous dicotyledonous plants compared with leguminous plant grasses or bare soil) significantly affected the concentration of certain nutrients (Mn, Mg, N and S) in the leaves. (ATA 11(12):57225. 1986)
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++ Tabs. Figs. 24 ref. Sum. (De, En)

Foliar and soil analysis in 51 coffee plantations of the M'Bomou region (Central African Republic) indicated the following: (1) all the plants were deficient in Zn, while 40-50 of the plants were below the critical levels of N, P, Ca and Fe, and 20-30 below those of K and Mg. No deficiencies could be detected as regards S, Mn, Cu and B; (2) the leaves had an abnormal Zn:Cu ratio (1:2.6, against 5:1 normally); (3) results of soil and plant analysis were not significantly correlated; (4) the type of undergrowth (non-leguminous dicotyledonous plants compared with leguminous plant grasses or bare soil) significantly affected the concentration of certain nutrients (Mn, Mg, N and S) in the leaves. (ATA 11(12):57225. 1986)

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